// nodeless version of the Not kernel
vx_status vxNot(vx_image input, vx_image output)
{
vx_uint32 y, x, width = 0, height = 0;
void *dst_base = NULL;
void *src_base = NULL;
vx_imagepatch_addressing_t dst_addr, src_addr;
vx_rectangle_t rect;
vx_status status = VX_SUCCESS;
status = vxGetValidRegionImage(input, &rect);
status |= vxAccessImagePatch(input, &rect, 0, &src_addr, (void **)&src_base, VX_READ_ONLY);
status |= vxAccessImagePatch(output, &rect, 0, &dst_addr, (void **)&dst_base, VX_WRITE_ONLY);
height = src_addr.dim_y;
width = src_addr.dim_x;
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
vx_uint8 *src = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_uint8 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
*dst = ~*src;
}
}
status |= vxCommitImagePatch(input, NULL, 0, &src_addr, src_base);
status |= vxCommitImagePatch(output, &rect, 0, &dst_addr, dst_base);
return status;
}
// generic bitwise op
static vx_status vxBinaryU8Op(vx_image in1, vx_image in2, vx_image output, bitwiseOp op)
{
vx_uint32 y, x, width = 0, height = 0;
void *dst_base = NULL;
void *src_base[2] = {NULL, NULL};
vx_imagepatch_addressing_t dst_addr, src_addr[2];
vx_rectangle_t rect;
vx_status status = VX_SUCCESS;
status = vxGetValidRegionImage(in1, &rect);
status |= vxAccessImagePatch(in1, &rect, 0, &src_addr[0], (void **)&src_base[0], VX_READ_ONLY);
status |= vxAccessImagePatch(in2, &rect, 0, &src_addr[1], (void **)&src_base[1], VX_READ_ONLY);
status |= vxAccessImagePatch(output, &rect, 0, &dst_addr, (void **)&dst_base, VX_WRITE_ONLY);
width = src_addr[0].dim_x;
height = src_addr[0].dim_y;
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
vx_uint8 *src[2] = {
vxFormatImagePatchAddress2d(src_base[0], x, y, &src_addr[0]),
vxFormatImagePatchAddress2d(src_base[1], x, y, &src_addr[1]),
};
vx_uint8 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
*dst = op(*src[0], *src[1]);
}
}
status |= vxCommitImagePatch(in1, NULL, 0, &src_addr[0], src_base[0]);
status |= vxCommitImagePatch(in2, NULL, 0, &src_addr[1], src_base[1]);
status |= vxCommitImagePatch(output, &rect, 0, &dst_addr, dst_base);
return status;
}
static vx_status vxMagnitudeKernel(vx_node node, vx_reference *parameters, vx_uint32 num)
{
vx_status status = VX_FAILURE;
if (num == 3)
{
vx_image grad_x = (vx_image)parameters[0];
vx_image grad_y = (vx_image)parameters[1];
vx_image output = (vx_image)parameters[2];
vx_uint32 y, x;
vx_fourcc format = 0;
vx_uint8 *dst_base = NULL;
vx_int16 *src_base_x = NULL;
vx_int16 *src_base_y = NULL;
vx_imagepatch_addressing_t dst_addr, src_addr_x, src_addr_y;
vx_rectangle rect;
vx_uint32 value;
if (grad_x == 0 || grad_y == 0)
return VX_ERROR_INVALID_PARAMETERS;
vxQueryImage(output, VX_IMAGE_ATTRIBUTE_FORMAT, &format, sizeof(format));
rect = vxGetValidRegionImage(grad_x);
status = VX_SUCCESS;
status |= vxAccessImagePatch(grad_x, rect, 0, &src_addr_x, (void **)&src_base_x);
status |= vxAccessImagePatch(grad_y, rect, 0, &src_addr_y, (void **)&src_base_y);
status |= vxAccessImagePatch(output, rect, 0, &dst_addr, (void **)&dst_base);
for (y = 0; y < src_addr_x.dim_y; y++)
{
for (x = 0; x < src_addr_x.dim_x; x++)
{
vx_int16 *in_x = vxFormatImagePatchAddress2d(src_base_x, x, y, &src_addr_x);
vx_int16 *in_y = vxFormatImagePatchAddress2d(src_base_y, x, y, &src_addr_y);
if (format == FOURCC_U8)
{
vx_uint8 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
vx_int32 grad[2] = {in_x[0]*in_x[0], in_y[0]*in_y[0]};
vx_float64 sum = grad[0] + grad[1];
value = ((vx_int32)sqrt(sum))/4;
*dst = (vx_uint8)(value > UINT8_MAX ? UINT8_MAX : value);
}
else if (format == FOURCC_S16)
{
vx_int16 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
vx_int32 grad[2] = {in_x[0]*in_x[0], in_y[0]*in_y[0]};
vx_float64 sum = grad[0] + grad[1];
value = (vx_int32)sqrt(sum);
*dst = (vx_int16)(value > INT16_MAX ? INT16_MAX : value);
}
}
}
status |= vxCommitImagePatch(grad_x, 0, 0, &src_addr_x, src_base_x);
status |= vxCommitImagePatch(grad_y, 0, 0, &src_addr_y, src_base_y);
status |= vxCommitImagePatch(output, rect, 0, &dst_addr, dst_base);
vxReleaseRectangle(&rect);
}
return status;
}
static vx_status vxPhaseKernel(vx_node node, vx_reference *parameters, vx_uint32 num)
{
vx_status status = VX_FAILURE;
if (num == 3)
{
vx_image grad_x = (vx_image)parameters[0];
vx_image grad_y = (vx_image)parameters[1];
vx_image output = (vx_image)parameters[2];
vx_uint32 y, x;
vx_uint8 *dst_base = NULL;
vx_int16 *src_base_x = NULL;
vx_int16 *src_base_y = NULL;
vx_imagepatch_addressing_t dst_addr, src_addr_x, src_addr_y;
vx_rectangle rect;
if (grad_x == 0 && grad_y == 0)
return VX_ERROR_INVALID_PARAMETERS;
rect = vxGetValidRegionImage(grad_x);
status = VX_SUCCESS;
status |= vxAccessImagePatch(grad_x, rect, 0, &src_addr_x, (void **)&src_base_x);
status |= vxAccessImagePatch(grad_y, rect, 0, &src_addr_y, (void **)&src_base_y);
status |= vxAccessImagePatch(output, rect, 0, &dst_addr, (void **)&dst_base);
for (y = 0; y < dst_addr.dim_y; y++)
{
for (x = 0; x < dst_addr.dim_x; x++)
{
vx_int16 *in_x = vxFormatImagePatchAddress2d(src_base_x, x, y, &src_addr_x);
vx_int16 *in_y = vxFormatImagePatchAddress2d(src_base_y, x, y, &src_addr_y);
vx_uint8 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
/* -M_PI to M_PI */
double arct = atan2((double)in_y[0],(double)in_x[0]);
/* 0.0 - 1.0 */
double norm = arct;
if (arct < 0.0)
{
norm = VX_TAU + arct;
}
/* 0 - 255 */
*dst = (vx_uint8)((vx_uint32)(norm * 255u) & 0xFFu);
if (in_y[0] != 0 || in_x[0] != 0)
{
VX_PRINT(VX_ZONE_INFO, "atan2(%d,%d) = %lf [norm=%lf] dst=%02x\n", in_y[0], in_x[0], arct, norm, *dst);
}
}
}
status |= vxCommitImagePatch(grad_x, 0, 0, &src_addr_x, src_base_x);
status |= vxCommitImagePatch(grad_y, 0, 0, &src_addr_y, src_base_y);
status |= vxCommitImagePatch(output, rect, 0, &dst_addr, dst_base);
vxReleaseRectangle(&rect);
}
return status;
}
vx_status vxConvolution3x3(vx_image src, vx_image dst, vx_int16 conv[3][3], const vx_border_mode_t *borders)
{
vx_uint32 y, x;
void *src_base = NULL;
void *dst_base = NULL;
vx_imagepatch_addressing_t src_addr, dst_addr;
vx_rectangle_t rect;
vx_enum dst_format = VX_DF_IMAGE_VIRT;
vx_status status = VX_SUCCESS;
vx_uint32 low_x = 0, low_y = 0, high_x, high_y;
status = vxGetValidRegionImage(src, &rect);
status |= vxAccessImagePatch(src, &rect, 0, &src_addr, &src_base, VX_READ_ONLY);
status |= vxAccessImagePatch(dst, &rect, 0, &dst_addr, &dst_base, VX_WRITE_ONLY);
status |= vxQueryImage(dst, VX_IMAGE_ATTRIBUTE_FORMAT, &dst_format, sizeof(dst_format));
high_x = src_addr.dim_x;
high_y = src_addr.dim_y;
if (borders->mode == VX_BORDER_MODE_UNDEFINED)
{
++low_x; --high_x;
++low_y; --high_y;
vxAlterRectangle(&rect, 1, 1, -1, -1);
}
//printf("%s Rectangle = {%u,%u x %u,%u}\n",__FUNCTION__, rect.start_x, rect.start_y, rect.end_x, rect.end_y);
for (y = low_y; y < high_y; y++)
{
for (x = low_x; x < high_x; x++)
{
vx_int32 value = vx_convolve8with16(src_base, x, y, &src_addr, conv, borders);
if (dst_format == VX_DF_IMAGE_U8)
{
vx_uint8 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
*dst = vx_clamp_u8_i32(value);
}
else
{
vx_int16 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
*dst = vx_clamp_s16_i32(value);
}
}
}
status |= vxCommitImagePatch(src, NULL, 0, &src_addr, src_base);
status |= vxCommitImagePatch(dst, &rect, 0, &dst_addr, dst_base);
return status;
}
// read image
int ReadImage(vx_image image, vx_rectangle_t * rectFull, FILE * fp)
{
// get number of planes, image format, and pixel type
vx_df_image format = VX_DF_IMAGE_VIRT;
vx_size num_planes = 0;
ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_FORMAT, &format, sizeof(format)));
ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_PLANES, &num_planes, sizeof(num_planes)));
// read all image planes into vx_image and check if EOF has occured while reading
bool eofDetected = false;
for (vx_uint32 plane = 0; plane < (vx_uint32)num_planes; plane++){
vx_imagepatch_addressing_t addr;
vx_uint8 * src = NULL;
ERROR_CHECK(vxAccessImagePatch(image, rectFull, plane, &addr, (void **)&src, VX_WRITE_ONLY));
vx_size width = (addr.dim_x * addr.scale_x) / VX_SCALE_UNITY;
vx_size width_in_bytes = (format == VX_DF_IMAGE_U1_AMD) ? ((width + 7) >> 3) : (width * addr.stride_x);
for (vx_uint32 y = 0; y < addr.dim_y; y += addr.step_y){
vx_uint8 *srcp = (vx_uint8 *)vxFormatImagePatchAddress2d(src, 0, y, &addr);
if (fread(srcp, 1, width_in_bytes, fp) != width_in_bytes) {
eofDetected = true;
break;
}
}
ERROR_CHECK(vxCommitImagePatch(image, rectFull, plane, &addr, src));
}
// return 1 if EOF detected, other 0
return eofDetected ? 1 : 0;
}
static vx_status map_vx_image(vx_image vxImg, uint32_t *width, uint32_t *height, mem_info_t *mem_info, vx_enum usage)
{
vx_size vxImgSize;
vx_status status = VX_SUCCESS;
vx_rectangle_t rect;
vx_imagepatch_addressing_t vxImg_addr;
void *vxImg_base = NULL;
status = vxGetValidRegionImage(vxImg, &rect);
if(status != VX_SUCCESS) return status;
status = vxAccessImagePatch(vxImg, &rect, 0, &vxImg_addr, (void **)&vxImg_base, usage);
if(status != VX_SUCCESS) return status;
*width = vxImg_addr.dim_x;
*height = vxImg_addr.dim_y;
status = get_vx_image_size(vxImg, &vxImgSize);
if(status != VX_SUCCESS) return status;
mem_info->len = vxImgSize;
mem_info->ptr = vxImg_base;
mem_info->vxImg_addr = vxImg_addr;
return status;
}
static vx_status VX_CALLBACK vxCopyImagePtrKernel(vx_node node, const vx_reference *parameters, vx_uint32 num)
{
vx_status status = VX_FAILURE;
if (num == 2)
{
vx_scalar input = (vx_scalar)parameters[0];
vx_image output = (vx_image)parameters[1];
vx_uint32 width = 0, height = 0, p = 0, y = 0, len = 0;
vx_size planes = 0;
void *src = NULL;
void *dst = NULL;
vx_imagepatch_addressing_t dst_addr;
vx_rectangle_t rect;
vx_uint8 *srcp = NULL;
vxReadScalarValue(input, &src);
srcp = (vx_uint8 *)src;
status = VX_SUCCESS; // assume success until an error occurs.
status |= vxQueryImage(output, VX_IMAGE_ATTRIBUTE_WIDTH, &width, sizeof(width));
status |= vxQueryImage(output, VX_IMAGE_ATTRIBUTE_HEIGHT, &height, sizeof(height));
status |= vxQueryImage(output, VX_IMAGE_ATTRIBUTE_PLANES, &planes, sizeof(planes));
rect.start_x = rect.start_y = 0;
rect.end_x = width;
rect.end_y = height;
for (p = 0; p < planes && status == VX_SUCCESS; p++)
{
status = VX_SUCCESS;
status |= vxAccessImagePatch(output, &rect, p, &dst_addr, &dst, VX_WRITE_ONLY);
for (y = 0; y < height && status == VX_SUCCESS; y+=dst_addr.step_y)
{
vx_uint8 *dstp = vxFormatImagePatchAddress2d(dst, 0, y, &dst_addr);
len = (dst_addr.stride_x * dst_addr.dim_x * dst_addr.scale_x) / VX_SCALE_UNITY;
memcpy(dstp, srcp, len);
srcp += len;
}
if (status == VX_SUCCESS) {
status |= vxCommitImagePatch(output, &rect, p, &dst_addr, dst);
}
}
}
else
{
status = VX_ERROR_INVALID_PARAMETERS;
}
return status;
}
// write image
int WriteImage(vx_image image, vx_rectangle_t * rectFull, FILE * fp)
{
// get number of planes, image format, and pixel type
vx_df_image format = VX_DF_IMAGE_VIRT;
vx_size num_planes = 0;
ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_FORMAT, &format, sizeof(format)));
ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_PLANES, &num_planes, sizeof(num_planes)));
// write all image planes from vx_image
bool eofDetected = false;
for (vx_uint32 plane = 0; plane < (vx_uint32)num_planes; plane++){
vx_imagepatch_addressing_t addr;
vx_uint8 * src = NULL;
ERROR_CHECK(vxAccessImagePatch(image, rectFull, plane, &addr, (void **)&src, VX_READ_ONLY));
vx_size width = (addr.dim_x * addr.scale_x) / VX_SCALE_UNITY;
vx_size width_in_bytes = (format == VX_DF_IMAGE_U1_AMD) ? ((width + 7) >> 3) : (width * addr.stride_x);
for (vx_uint32 y = 0; y < addr.dim_y; y += addr.step_y){
vx_uint8 *srcp = (vx_uint8 *)vxFormatImagePatchAddress2d(src, 0, y, &addr);
fwrite(srcp, 1, width_in_bytes, fp);
}
ERROR_CHECK(vxCommitImagePatch(image, rectFull, plane, &addr, src));
}
return 0;
}
// Compute checksum of rectangular region specified within an image
void ComputeChecksum(char checkSumString[64], vx_image image, vx_rectangle_t * rectRegion)
{
// get number of planes
vx_df_image format = VX_DF_IMAGE_VIRT;
vx_size num_planes = 0;
ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_FORMAT, &format, sizeof(format)));
ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_PLANES, &num_planes, sizeof(num_planes)));
// compute checksum
CHasher checksum; checksum.Initialize();
for (vx_uint32 plane = 0; plane < (vx_uint32)num_planes; plane++) {
vx_imagepatch_addressing_t addr;
vx_uint8 * base_ptr = nullptr;
ERROR_CHECK(vxAccessImagePatch(image, rectRegion, plane, &addr, (void **)&base_ptr, VX_READ_ONLY));
vx_uint32 width = ((addr.dim_x * addr.scale_x) / VX_SCALE_UNITY);
vx_uint32 height = ((addr.dim_y * addr.scale_y) / VX_SCALE_UNITY);
vx_uint32 width_in_bytes = (format == VX_DF_IMAGE_U1_AMD) ? ((width + 7) >> 3) : (width * addr.stride_x);
for (vx_uint32 y = 0; y < height; y++) {
checksum.Process(base_ptr + y * addr.stride_y, width_in_bytes);
}
ERROR_CHECK(vxCommitImagePatch(image, rectRegion, plane, &addr, base_ptr));
}
// copy the checksum string
strcpy(checkSumString, checksum.GetCheckSum());
}
////////
// main() has all the OpenVX application code for this exercise.
// Command-line usage:
// % solution_exercise2 [<video-sequence>|<camera-device-number>]
// When neither video sequence nor camera device number is specified,
// it defaults to the video sequence in "PETS09-S1-L1-View001.avi".
int main( int argc, char * argv[] )
{
// Get default video sequence when nothing is specified on command-line and
// instantiate OpenCV GUI module for reading input RGB images and displaying
// the image with OpenVX results.
const char * video_sequence = argv[1];
CGuiModule gui( video_sequence );
// Try to grab the first video frame from the sequence using cv::VideoCapture
// and check if a video frame is available.
if( !gui.Grab() )
{
printf( "ERROR: input has no video\n" );
return 1;
}
////////
// Set the application configuration parameters. Note that input video
// sequence is an 8-bit RGB image with dimensions given by gui.GetWidth()
// and gui.GetHeight(). The parameters for the Harris corners algorithm are:
// max_keypoint_count - maximum number of keypoints to track
// harris_strength_thresh - minimum threshold score to keep a corner
// (computed using the normalized Sobel kernel)
// harris_min_distance - radial L2 distance for non-max suppression
// harris_k_sensitivity - sensitivity threshold k from the Harris-Stephens
// harris_gradient_size - window size for gradient computation
// harris_block_size - block window size used to compute the
// Harris corner score
// lk_pyramid_levels - number of pyramid levels for LK optical flow
// lk_termination - can be VX_TERM_CRITERIA_ITERATIONS or
// VX_TERM_CRITERIA_EPSILON or
// VX_TERM_CRITERIA_BOTH
// lk_epsilon - error for terminating the algorithm
// lk_num_iterations - number of iterations
// lk_use_initial_estimate - turn on/off use of initial estimates
// lk_window_dimension - size of window on which to perform the algorithm
vx_uint32 width = gui.GetWidth();
vx_uint32 height = gui.GetHeight();
vx_size max_keypoint_count = 10000;
vx_float32 harris_strength_thresh = 0.0005f;
vx_float32 harris_min_distance = 5.0f;
vx_float32 harris_k_sensitivity = 0.04f;
vx_int32 harris_gradient_size = 3;
vx_int32 harris_block_size = 3;
vx_uint32 lk_pyramid_levels = 6;
vx_float32 lk_pyramid_scale = VX_SCALE_PYRAMID_HALF;
vx_enum lk_termination = VX_TERM_CRITERIA_BOTH;
vx_float32 lk_epsilon = 0.01f;
vx_uint32 lk_num_iterations = 5;
vx_bool lk_use_initial_estimate = vx_false_e;
vx_uint32 lk_window_dimension = 6;
////////
// Create the OpenVX context and make sure the returned context is valid and
// register the log_callback to receive messages from OpenVX framework.
vx_context context = vxCreateContext();
ERROR_CHECK_OBJECT( context );
vxRegisterLogCallback( context, log_callback, vx_false_e );
////////
// Create OpenVX image object for input RGB image.
vx_image input_rgb_image = vxCreateImage( context, width, height, VX_DF_IMAGE_RGB );
ERROR_CHECK_OBJECT( input_rgb_image );
////////********
// OpenVX optical flow functionality requires pyramids of the current input
// image and the previous image. It also requires keypoints that correspond
// to the previous pyramid and will output updated keypoints into
// another keypoint array. To be able to toggle between the current and
// the previous buffers, you need to use OpenVX delay objects and vxAgeDelay().
// Create OpenVX pyramid and array object exemplars and create OpenVX delay
// objects for both to hold two of each. Note that the exemplar objects are not
// needed once the delay objects are created.
//
// TODO STEP 01:********
// 1. Use vxCreatePyramid API to create a pyramid exemplar with the
// same dimensions as the input image, VX_DF_IMAGE_U8 as image format,
// lk_pyramid_levels as levels, and lk_pyramid_scale as scale.
// We gave code for this in comments.
// 2. Use vxCreateArray API to create an array exemplar with
// keypoint data type with num_keypoint_count as capacity.
// You need to add missing parameters to code in comments.
// 3. Use vxCreateDelay API to create delay objects for pyramid and
// keypoint array using the exemplars created using the two steps above.
// Use 2 delay slots for both of the delay objects.
// We gave code for one in comments; do similar for the other.
// 4. Release the pyramid and keypoint array exemplar objects.
// We gave code for one in comments; do similar for the other.
// 5. Use ERROR_CHECK_OBJECT/STATUS macros for proper error checking.
// We gave few error checks; do similar for the others.
// vx_pyramid pyramidExemplar = vxCreatePyramid( context, lk_pyramid_levels,
// lk_pyramid_scale, width, height, VX_DF_IMAGE_U8 );
// ERROR_CHECK_OBJECT( pyramidExemplar );
// vx_delay pyramidDelay = vxCreateDelay( context, ( vx_reference )pyramidExemplar, 2 );
// ERROR_CHECK_OBJECT( pyramidDelay );
// ERROR_CHECK_STATUS( vxReleasePyramid( &pyramidExemplar ) );
// vx_array keypointsExemplar = vxCreateArray( /* Fill in parameters */ );
// vx_delay keypointsDelay = vxCreateDelay( /* Fill in parameters */ );
////////********
// An object from a delay slot can be accessed using vxGetReferenceFromDelay API.
// You need to use index = 0 for the current object and index = -1 for the previous object.
//
// TODO STEP 02:********
// 1. Use vxGetReferenceFromDelay API to get the current and previous
// pyramid objects from pyramid delay object. Note that you need
// to typecast the vx_reference object to vx_pyramid.
// We gave code for one in comments; do similar for the other.
// 2. Similarly, get the current and previous keypoint array objects from
// the keypoint delay object.
// We gave code for one in comments; do similar for the other.
// 3. Use ERROR_CHECK_OBJECT for proper error checking.
// We gave one error check; do similar for the others.
// vx_pyramid currentPyramid = ( vx_pyramid ) vxGetReferenceFromDelay( pyramidDelay, 0 );
// vx_pyramid previousPyramid = ( vx_pyramid ) vxGetReferenceFromDelay( /* Fill in parameters */ );
// vx_array currentKeypoints = ( vx_array ) vxGetReferenceFromDelay( /* Fill in parameters */ );
// vx_array previousKeypoints = ( vx_array ) vxGetReferenceFromDelay( keypointsDelay, -1 );
// ERROR_CHECK_OBJECT( currentPyramid );
////////********
// Harris and optical flow algorithms require their own graph objects.
// The Harris graph needs to extract gray scale image out of input RGB,
// compute an initial set of keypoints, and compute an initial pyramid for use
// by the optical flow graph.
//
// TODO STEP 03:********
// 1. Create two graph objects: one for the Harris corner detector and
// the other for feature tracking using optical flow using the
// vxCreateGraph API.
// We gave code for one graph; do similar for the other.
// 2. Use ERROR_CHECK_OBJECT to check the objects.
// We gave one error check; do similar for the other.
// vx_graph graphHarris = vxCreateGraph( context );
// vx_graph graphTrack = /* Fill in here */;
// ERROR_CHECK_OBJECT( graphHarris );
////////********
// Harris and pyramid computation expect input to be an 8-bit image.
// Given that input is an RGB image, it is best to extract a gray image
// from RGB image, which requires two steps:
// - perform RGB to IYUV color conversion
// - extract Y channel from IYUV image
// This requires two intermediate OpenVX image objects. Since you don't
// need to access these objects from the application, they can be virtual
// objects that can be created using the vxCreateVirtualImage API.
//
// TODO STEP 04:********
// 1. Create an IYUV image and a U8 image (for Y channel) with the same
// dimensions as the input RGB image. Note that the image formats for
// IYUV and U8 images are VX_DF_IMAGE_IYUV and VX_DF_IMAGE_U8.
// Note that virtual objects are specific to a graph, so you
// need to create two sets, one for each graph.
// We gave one fully in comments and you need to fill in missing
// parameters for the others.
// 2. Use ERROR_CHECK_OBJECT to check the objects.
// We gave one error check in comments; do similar for others.
// vx_image harris_yuv_image = vxCreateVirtualImage( graphHarris, width, height, VX_DF_IMAGE_IYUV );
// vx_image harris_luma_image = vxCreateVirtualImage( graphHarris, /* Fill in parameters */ );
// vx_image opticalflow_yuv_image = vxCreateVirtualImage( graphTrack, /* Fill in parameters */ );
// vx_image opticalflow_luma_image = vxCreateVirtualImage( /* Fill in parameters */ );
// ERROR_CHECK_OBJECT( harris_yuv_image );
////////********
// The Harris corner detector and optical flow nodes (see "VX/vx_nodes.h")
// take strength_thresh, min_distance, sensitivity, epsilon,
// num_iterations, and use_initial_estimate parameters as scalar
// data objects. So, you need to create scalar objects with the corresponding
// configuration parameters.
//
// TODO STEP 05:********
// 1. Create scalar data objects of VX_TYPE_FLOAT32 for strength_thresh,
// min_distance, sensitivity, and epsilon. Set their
// initial values to harris_strength_thresh, harris_min_distance,
// harris_k_sensitivity, and lk_epsilon.
// We gave code full code for one scalar in comments; fill in
// missing arguments for other ones.
// 2. Similarly, create scalar objects for num_iterations and
// use_initial_estimate with initial values: lk_num_iterations and
// lk_use_initial_estimate. Make sure to use proper data types for
// these parameters.
// We gave code full code for one scalar in comments; fill in
// missing arguments for the other.
// 3. Use ERROR_CHECK_OBJECT to check proper creation of objects.
// We gave the error check for one scalar; do similar for other 5 scalars.
// vx_scalar strength_thresh = NULL; // vxCreateScalar( context, VX_TYPE_FLOAT32, &harris_strength_thresh );
// vx_scalar min_distance = NULL; // vxCreateScalar( context, /* Fill in parameters */ );
// vx_scalar sensitivity = NULL; // vxCreateScalar( /* Fill in parameters */ );
// vx_scalar epsilon = NULL; // vxCreateScalar( /* Fill in parameters */ );
// vx_scalar num_iterations = NULL; // vxCreateScalar( context, VX_TYPE_UINT32, /* Fill in parameter */ );
// vx_scalar use_initial_estimate = NULL; // vxCreateScalar( context, VX_TYPE_BOOL, &lk_use_initial_estimate );
// ERROR_CHECK_OBJECT( strength_thresh );
////////********
// Now all the objects have been created for building the graphs.
// First, build a graph that performs Harris corner detection and initial pyramid computation.
// See "VX/vx_nodes.h" for APIs how to add nodes into a graph.
//
// TODO STEP 06:********
// 1. Use vxColorConvertNode and vxChannelExtractNode APIs to get gray
// scale image for Harris and Pyramid computation from the input
// RGB image. Add these nodes into Harris graph.
// We gave code in comments with a missing parameter for you to fill in.
// 2. Use vxGaussianPyramidNode API to add pyramid computation node.
// You need to use the current pyramid from the pyramid delay object.
// We gave code in comments with a missing parameter for you to fill in.
// 3. Use vxHarrisCornersNode API to add a Harris corners node.
// You need to use the current keypoints from keypoints delay object.
// We gave code in comments with few missing parameters for you to fill in.
// 4. Use ERROR_CHECK_OBJECT to check proper creation of objects.
// 5. Release node and virtual objects immediately since the graph
// retains references to them.
// 6. Call vxVerifyGraph to check for any errors in the graph.
// Fill in missing parameter in commented code.
// vx_node nodesHarris[] =
// {
// vxColorConvertNode( graphHarris, input_rgb_image, harris_yuv_image ),
// vxChannelExtractNode( graphHarris, /* Fill in parameter */, VX_CHANNEL_Y, harris_luma_image ),
// vxGaussianPyramidNode( graphHarris, /* Fill in parameter */, currentPyramid ),
// vxHarrisCornersNode( graphHarris, /* Fill in missing parameters */, currentKeypoints, NULL )
// };
// for( vx_size i = 0; i < sizeof( nodesHarris ) / sizeof( nodesHarris[0] ); i++ )
// {
// ERROR_CHECK_OBJECT( nodesHarris[i] );
// ERROR_CHECK_STATUS( vxReleaseNode( &nodesHarris[i] ) );
// }
// ERROR_CHECK_STATUS( vxReleaseImage( &harris_yuv_image ) );
// ERROR_CHECK_STATUS( vxReleaseImage( &harris_luma_image ) );
// ERROR_CHECK_STATUS( vxVerifyGraph( /* Fill in parameter */ ) );
////////********
// Now, build a graph that performs pyramid computation and feature
// tracking using optical flow.
//
// TODO STEP 07:********
// 1. Use vxColorConvertNode and vxChannelExtractNode APIs to get a gray
// scale image for Harris and Pyramid computation from the input
// RGB image. Add these nodes into Harris graph.
// We gave the code in comments for color convert node; do similar
// one for the channel extract node.
// 2. Use vxGaussianPyramidNode API to add pyramid computation node.
// You need to use the current pyramid from the pyramid delay object.
// Most of the code is given in the comments; fill in the missing parameter.
// 3. Use vxOpticalFlowPyrLKNode API to add an optical flow node. You need to
// use the current and previous keypoints from the keypoints delay object.
// Fill in the missing parameters in commented code.
// 4. Use ERROR_CHECK_OBJECT to check proper creation of objects.
// 5. Release node and virtual objects immediately since the graph
// retains references to them.
// 6. Call vxVerifyGraph to check for any errors in the graph.
// Fill in the missing parameter in commented code.
// vx_node nodesTrack[] =
// {
// vxColorConvertNode( graphTrack, input_rgb_image, opticalflow_yuv_image ),
// vxChannelExtractNode( graphTrack, /* Fill in parameters */ ),
// vxGaussianPyramidNode( graphTrack, /* Fill in parameter */, currentPyramid ),
// vxOpticalFlowPyrLKNode( graphTrack, /* Fill in parameters */ )
// };
// for( vx_size i = 0; i < sizeof( nodesTrack ) / sizeof( nodesTrack[0] ); i++ )
// {
// ERROR_CHECK_OBJECT( nodesTrack[i] );
// ERROR_CHECK_STATUS( vxReleaseNode( &nodesTrack[i] ) );
// }
// ERROR_CHECK_STATUS( vxReleaseImage( &opticalflow_yuv_image ) );
// ERROR_CHECK_STATUS( vxReleaseImage( &opticalflow_luma_image ) );
// ERROR_CHECK_STATUS( vxVerifyGraph( /* Fill in parameter */ ) );
////////
// Process the video sequence frame by frame until the end of sequence or aborted.
for( int frame_index = 0; !gui.AbortRequested(); frame_index++ )
{
////////
// Copy the input RGB frame from OpenCV to OpenVX.
// In order to do this, you need to use vxAccessImagePatch and vxCommitImagePatch APIs.
// See "VX/vx_api.h" for the description of these APIs.
vx_rectangle_t cv_rgb_image_region;
cv_rgb_image_region.start_x = 0;
cv_rgb_image_region.start_y = 0;
cv_rgb_image_region.end_x = width;
cv_rgb_image_region.end_y = height;
vx_imagepatch_addressing_t cv_rgb_image_layout;
cv_rgb_image_layout.stride_x = 3;
cv_rgb_image_layout.stride_y = gui.GetStride();
vx_uint8 * cv_rgb_image_buffer = gui.GetBuffer();
ERROR_CHECK_STATUS( vxAccessImagePatch( input_rgb_image, &cv_rgb_image_region, 0,
&cv_rgb_image_layout, ( void ** )&cv_rgb_image_buffer, VX_WRITE_ONLY ) );
ERROR_CHECK_STATUS( vxCommitImagePatch( input_rgb_image, &cv_rgb_image_region, 0,
&cv_rgb_image_layout, cv_rgb_image_buffer ) );
////////********
// Now that input RGB image is ready, just run a graph.
// Run Harris at the beginning to initialize the previous keypoints.
//
// TODO STEP 08:********
// 1. Run a graph using vxProcessGraph API. Select Harris graph
// if the frame_index == 0 (i.e., the first frame of the video
// sequence), otherwise, select the feature tracking graph.
// 2. Use ERROR_CHECK_STATUS for error checking.
////////********
// To mark the keypoints in display, you need to access the output
// keypoint array and draw each item on the output window using gui.DrawArrow().
//
// TODO STEP 09:********
// 1. Use vxGetReferenceFromDelay API to get the current and previous
// keypoints array objects from the keypoints delay object.
// Make sure to typecast the vx_reference object to vx_array.
// We gave one for the previous previous keypoint array in comments;
// do a similar one for the current keypoint array.
// 2. OpenVX array object has an attribute that keeps the current
// number of items in the array. The name of the attribute is
// VX_ARRAY_ATTRIBUTE_NUMITEMS and its value is of type vx_size.
// Use vxQueryArray API to get number of keypoints in the
// current keypoint array data object, representing number of
// corners detected in the input RGB image.
// IMPORTANT: Read number of items into "num_corners"
// because this variable is displayed by code segment below.
// We gave most part of this statement in comment; just fill in the
// missing parameter.
// 3. The data items in output keypoint array are of type
// vx_keypoint_t (see "VX/vx_types.h"). To access the array
// buffer, use vxAccessArrayRange with start index = 0,
// end index = number of items in the array, and usage mode =
// VX_READ_ONLY. Note that the stride returned by this access
// call is not guaranteed to be sizeof(vx_keypoint_t).
// Also make sure that num_corners is > 0, because
// vxAccessArrayRange expects end index > 0.
// We gave the code for previous keypoint array in comment;
// do similar one for the current keypoint array.
// 4. For each item in the keypoint buffer, use vxArrayItem to
// access an individual keypoint and draw a marker at (x,y)
// using gui.DrawArrow() if tracking_status field of keypoint
// is non-zero. Also count number of keypoints with
// non-zero tracking_status into "num_tracking" variable.
// We gave most of the code; fill in the missing parameters and uncomment.
// 5. Hand the control of output keypoint buffer over back to
// OpenVX framework by calling vxCommitArrayRange API.
// We gave the code for previous keypoint array in comment;
// do similar one for the current keypoint array.
// 6. Use ERROR_CHECK_STATUS for error checking.
vx_size num_corners = 0, num_tracking = 0;
// previousKeypoints = ( vx_array )vxGetReferenceFromDelay( keypointsDelay, -1 );
// currentKeypoints = ( vx_array )vxGetReferenceFromDelay( /* Fill in parameters */ );
// ERROR_CHECK_OBJECT( currentKeypoints );
// ERROR_CHECK_OBJECT( previousKeypoints );
// ERROR_CHECK_STATUS( vxQueryArray( previousKeypoints, /* Fill in parameter */, &num_corners, sizeof( num_corners ) ) );
if( num_corners > 0 )
{
vx_size kp_old_stride, kp_new_stride;
vx_keypoint_t * kp_old_buf = NULL, * kp_new_buf = NULL;
// ERROR_CHECK_STATUS( vxAccessArrayRange( previousKeypoints, 0, num_corners,
// &kp_old_stride, ( void ** ) &kp_old_buf, VX_READ_ONLY ) );
// ERROR_CHECK_STATUS( vxAccessArrayRange( /* Fill in parameters */ );
for( vx_size i = 0; i < num_corners; i++ )
{
// vx_keypoint_t * kp_old = &vxArrayItem( vx_keypoint_t, kp_old_buf, i, kp_old_stride );
// vx_keypoint_t * kp_new = &vxArrayItem( /* Fill in parameters */ );
// if( kp_new->tracking_status )
// {
// num_tracking++;
// gui.DrawArrow( kp_old->x, kp_old->y, kp_new->x, kp_new->y );
// }
}
// ERROR_CHECK_STATUS( vxCommitArrayRange( previousKeypoints, 0, num_corners, kp_old_buf ) );
// ERROR_CHECK_STATUS( vxCommitArrayRange( /* Fill in parameters */ ) );
}
////////********
// Flip the current and previous pyramid and keypoints in the delay objects.
//
// TODO STEP 10:********
// 1. Use vxAgeDelay API to flip the current and previous buffers in delay objects.
// You need to call vxAgeDelay for both two delay objects.
// 2. Use ERROR_CHECK_STATUS for error checking.
// ERROR_CHECK_STATUS( vxAgeDelay( /* Fill in parameter */ ) );
// ERROR_CHECK_STATUS( vxAgeDelay( /* Fill in parameter */ ) );
////////
// Display the results and grab the next input RGB frame for the next iteration.
char text[128];
sprintf( text, "Keyboard ESC/Q-Quit SPACE-Pause [FRAME %d]", frame_index );
gui.DrawText( 0, 16, text );
sprintf( text, "Number of Corners: %d [tracking %d]", ( int )num_corners, ( int )num_tracking );
gui.DrawText( 0, 36, text );
gui.Show();
if( !gui.Grab() )
{
// Terminate the processing loop if the end of sequence is detected.
gui.WaitForKey();
break;
}
}
////////********
// Query graph performance using VX_GRAPH_ATTRIBUTE_PERFORMANCE and print timing
// in milliseconds. Note that time units of vx_perf_t fields are nanoseconds.
//
// TODO STEP 11:********
// 1. Use vxQueryGraph API with VX_GRAPH_ATTRIBUTE_PERFORMANCE to query graph performance.
// We gave the attribute query for one graph in comments. Do the same for the second graph.
// 2. Print the average and min execution times in milliseconds. Use the printf in comments.
// vx_perf_t perfHarris = { 0 }, perfTrack = { 0 };
// ERROR_CHECK_STATUS( vxQueryGraph( graphHarris, VX_GRAPH_ATTRIBUTE_PERFORMANCE, &perfHarris, sizeof( perfHarris ) ) );
// ERROR_CHECK_STATUS( vxQueryGraph( /* Fill in parameters here for get performance of the other graph */ );
// printf( "GraphName NumFrames Avg(ms) Min(ms)\n"
// "Harris %9d %7.3f %7.3f\n"
// "Track %9d %7.3f %7.3f\n",
// ( int )perfHarris.num, ( float )perfHarris.avg * 1e-6f, ( float )perfHarris.min * 1e-6f,
// ( int )perfTrack.num, ( float )perfTrack.avg * 1e-6f, ( float )perfTrack.min * 1e-6f );
////////********
// Release all the OpenVX objects created in this exercise, and make the context as the last one to release.
// To release an OpenVX object, you need to call vxRelease<Object> API which takes a pointer to the object.
// If the release operation is successful, the OpenVX framework will reset the object to NULL.
//
// TODO STEP 12:********
// 1. For releasing all other objects use vxRelease<Object> APIs.
// You have to release 2 graph objects, 1 image object, 2 delay objects,
// 6 scalar objects, and 1 context object.
// 2. Use ERROR_CHECK_STATUS for error checking.
// ERROR_CHECK_STATUS( vxReleaseContext( &context ) );
return 0;
}
// nodeless version of the Convolve kernel
vx_status vxConvolve(vx_image src, vx_convolution conv, vx_image dst, vx_border_mode_t *bordermode)
{
vx_int32 y, x, i;
void *src_base = NULL;
void *dst_base = NULL;
vx_imagepatch_addressing_t src_addr, dst_addr;
vx_rectangle_t rect;
vx_size conv_width, conv_height;
vx_int32 conv_radius_x, conv_radius_y;
vx_int16 conv_mat[C_MAX_CONVOLUTION_DIM * C_MAX_CONVOLUTION_DIM] = {0};
vx_int32 sum = 0, value = 0;
vx_uint32 scale = 1;
vx_df_image src_format = 0;
vx_df_image dst_format = 0;
vx_status status = VX_SUCCESS;
vx_int32 low_x, low_y, high_x, high_y;
status |= vxQueryImage(src, VX_IMAGE_ATTRIBUTE_FORMAT, &src_format, sizeof(src_format));
status |= vxQueryImage(dst, VX_IMAGE_ATTRIBUTE_FORMAT, &dst_format, sizeof(dst_format));
status |= vxQueryConvolution(conv, VX_CONVOLUTION_ATTRIBUTE_COLUMNS, &conv_width, sizeof(conv_width));
status |= vxQueryConvolution(conv, VX_CONVOLUTION_ATTRIBUTE_ROWS, &conv_height, sizeof(conv_height));
status |= vxQueryConvolution(conv, VX_CONVOLUTION_ATTRIBUTE_SCALE, &scale, sizeof(scale));
conv_radius_x = (vx_int32)conv_width / 2;
conv_radius_y = (vx_int32)conv_height / 2;
status |= vxReadConvolutionCoefficients(conv, conv_mat);
status |= vxGetValidRegionImage(src, &rect);
status |= vxAccessImagePatch(src, &rect, 0, &src_addr, &src_base, VX_READ_ONLY);
status |= vxAccessImagePatch(dst, &rect, 0, &dst_addr, &dst_base, VX_WRITE_ONLY);
if (bordermode->mode == VX_BORDER_MODE_UNDEFINED)
{
low_x = conv_radius_x;
high_x = ((src_addr.dim_x >= (vx_uint32)conv_radius_x) ? src_addr.dim_x - conv_radius_x : 0);
low_y = conv_radius_y;
high_y = ((src_addr.dim_y >= (vx_uint32)conv_radius_y) ? src_addr.dim_y - conv_radius_y : 0);
vxAlterRectangle(&rect, conv_radius_x, conv_radius_y, -conv_radius_x, -conv_radius_y);
}
else
{
low_x = 0;
high_x = src_addr.dim_x;
low_y = 0;
high_y = src_addr.dim_y;
}
for (y = low_y; y < high_y; ++y)
{
for (x = low_x; x < high_x; ++x)
{
sum = 0;
if (src_format == VX_DF_IMAGE_U8)
{
vx_uint8 slice[C_MAX_CONVOLUTION_DIM * C_MAX_CONVOLUTION_DIM] = {0};
vxReadRectangle(src_base, &src_addr, bordermode, src_format, x, y, conv_radius_x, conv_radius_y, slice);
for (i = 0; i < conv_width * conv_height; ++i)
sum += conv_mat[conv_width * conv_height - 1 - i] * slice[i];
}
else if (src_format == VX_DF_IMAGE_S16)
{
vx_int16 slice[C_MAX_CONVOLUTION_DIM * C_MAX_CONVOLUTION_DIM] = {0};
vxReadRectangle(src_base, &src_addr, bordermode, src_format, x, y, conv_radius_x, conv_radius_y, slice);
for (i = 0; i < conv_width * conv_height; ++i)
sum += conv_mat[conv_width * conv_height - 1 - i] * slice[i];
}
value = sum / (vx_int32) scale;
if (dst_format == VX_DF_IMAGE_U8)
{
vx_uint8 *dstp = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
if (value < 0) *dstp = 0;
else if (value > UINT8_MAX) *dstp = UINT8_MAX;
else *dstp = value;
}
else if (dst_format == VX_DF_IMAGE_S16)
{
vx_int16 *dstp = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
if (value < INT16_MIN) *dstp = INT16_MIN;
else if (value > INT16_MAX) *dstp = INT16_MAX;
else *dstp = value;
}
}
}
status |= vxCommitImagePatch(src, NULL, 0, &src_addr, src_base);
status |= vxCommitImagePatch(dst, &rect, 0, &dst_addr, dst_base);
return status;
}
static vx_status vxChannelCombineKernel(vx_node node, vx_reference *parameters, vx_uint32 num)
{
vx_status status = VX_FAILURE;
if (num == 5)
{
vx_image inputs[4] = {
(vx_image)parameters[0],
(vx_image)parameters[1],
(vx_image)parameters[2],
(vx_image)parameters[3],
};
vx_image output = (vx_image)parameters[4];
vx_fourcc format = 0;
vx_rectangle rect;
vxQueryImage(output, VX_IMAGE_ATTRIBUTE_FORMAT, &format, sizeof(format));
rect = vxGetValidRegionImage(inputs[0]);
if ((format == FOURCC_RGB) || (format == FOURCC_RGBX))
{
/* write all the channels back out in interleaved format */
vx_imagepatch_addressing_t src_addrs[4];
vx_imagepatch_addressing_t dst_addr;
void *base_src_ptrs[4] = {NULL, NULL, NULL, NULL};
void *base_dst_ptr = NULL;
uint32_t x, y, p;
uint32_t numplanes = 3;
if (format == FOURCC_RGBX)
{
numplanes = 4;
}
// get the planes
for (p = 0; p < numplanes; p++)
{
vxAccessImagePatch(inputs[p], rect, 0, &src_addrs[p], &base_src_ptrs[p]);
}
vxAccessImagePatch(output, rect, 0, &dst_addr, &base_dst_ptr);
for (y = 0; y < dst_addr.dim_y; y+=dst_addr.step_y)
{
for (x = 0; x < dst_addr.dim_x; x+=dst_addr.step_x)
{
uint8_t *planes[4] = {
vxFormatImagePatchAddress2d(base_src_ptrs[0], x, y, &src_addrs[0]),
vxFormatImagePatchAddress2d(base_src_ptrs[1], x, y, &src_addrs[1]),
vxFormatImagePatchAddress2d(base_src_ptrs[2], x, y, &src_addrs[2]),
NULL,
};
uint8_t *dst = vxFormatImagePatchAddress2d(base_dst_ptr, x, y, &dst_addr);
dst[0] = planes[0][0];
dst[1] = planes[1][0];
dst[2] = planes[2][0];
if (format == FOURCC_RGBX)
{
planes[3] = vxFormatImagePatchAddress2d(base_src_ptrs[3], x, y, &src_addrs[3]);
dst[3] = planes[3][0];
}
}
}
// write the data back
vxCommitImagePatch(output, rect, 0, &dst_addr, base_dst_ptr);
// release the planes
for (p = 0; p < numplanes; p++)
{
vxCommitImagePatch(inputs[p], 0, 0, &src_addrs[p], &base_src_ptrs[p]);
}
}
else if (format == FOURCC_YUV4)
{
/* write all the channels back out in the planar format */
vx_imagepatch_addressing_t src_addrs[3];
vx_imagepatch_addressing_t dst_addrs[3];
void *base_src_ptrs[3] = {NULL, NULL, NULL};
void *base_dst_ptrs[3] = {NULL, NULL, NULL};
uint32_t x, y, p;
// get the planes
for (p = 0; p < 3; p++)
{
vxAccessImagePatch(inputs[p], rect, 0, &src_addrs[p], &base_src_ptrs[p]);
vxAccessImagePatch(output, rect, 0, &dst_addrs[p], &base_dst_ptrs[p]);
}
for (y = 0; y < dst_addrs[0].dim_y; y+=dst_addrs[0].step_y)
{
for (x = 0; x < dst_addrs[0].dim_x; x+=dst_addrs[0].step_x)
{
uint8_t *planes[3] = {
vxFormatImagePatchAddress2d(base_src_ptrs[0], x, y, &src_addrs[0]),
vxFormatImagePatchAddress2d(base_src_ptrs[1], x, y, &src_addrs[1]),
vxFormatImagePatchAddress2d(base_src_ptrs[2], x, y, &src_addrs[2]),
};
uint8_t *dsts[3] = {
vxFormatImagePatchAddress2d(base_dst_ptrs[0], x, y, &dst_addrs[0]),
vxFormatImagePatchAddress2d(base_dst_ptrs[0], x, y, &dst_addrs[0]),
vxFormatImagePatchAddress2d(base_dst_ptrs[0], x, y, &dst_addrs[0]),
};
dsts[0][0] = planes[0][0];
dsts[1][0] = planes[1][0];
dsts[2][0] = planes[2][0];
}
}
// release the planes
for (p = 0; p < 3; p++)
{
// write the data back
vxCommitImagePatch(output, rect, 0, &dst_addrs[p], base_dst_ptrs[p]);
// release the input
vxCommitImagePatch(inputs[p], 0, 0, &src_addrs[p], &base_src_ptrs[p]);
}
}
vxReleaseRectangle(&rect);
status = VX_SUCCESS;
}
else
status = VX_ERROR_INVALID_PARAMETERS;
return status;
}
static vx_status vxEqualizeHistKernel(vx_node node, vx_reference *parameters, vx_uint32 num)
{
vx_status status = VX_FAILURE;
if (num == 2)
{
vx_image src = (vx_image)parameters[0];
vx_image dst = (vx_image)parameters[1];
vx_uint32 y, x, width = 0, height = 0;
void *src_base = NULL;
void *dst_base = NULL;
vx_imagepatch_addressing_t src_addr, dst_addr;
vx_rectangle rect;
status = VX_SUCCESS;
status |= vxQueryImage(src, VX_IMAGE_ATTRIBUTE_WIDTH, &width, sizeof(width));
status |= vxQueryImage(src, VX_IMAGE_ATTRIBUTE_HEIGHT, &height, sizeof(height));
rect = vxCreateRectangle(vxGetContext(node), 0, 0, width, height);
status |= vxAccessImagePatch(src, rect, 0, &src_addr, &src_base);
status |= vxAccessImagePatch(dst, rect, 0, &dst_addr, &dst_base);
if (status == VX_SUCCESS)
{
/* for 16-bit support (U16 or S16), the code can be duplicated with NUM_BINS = 65536 and PIXEL = vx_uint16. */
#define NUM_BINS 256
/* allocate a fixed-size temp array to store the image histogram & cumulative distribution */
vx_uint32 hist[NUM_BINS];
vx_uint32 cdf[NUM_BINS];
vx_uint32 sum = 0;
vx_uint32 maxVal = 0;
vx_float32 scaleFactor = 0.0f;
/* calculate the distribution (histogram) */
memset(hist, 0, sizeof(hist));
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
vx_uint8 *src_ptr = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_uint8 pixel = *src_ptr;
hist[pixel]++;
}
}
/* calculate the cumulative distribution (summed histogram) */
for (x = 0; x < NUM_BINS; x++)
{
cdf[x] = sum;
sum += hist[x];
}
/* find the scale factor from the max cdf value */
maxVal = cdf[0];
for (x = 1; x < NUM_BINS; x++)
{
if (maxVal < cdf[x])
{
maxVal = cdf[x];
}
}
scaleFactor = 255.0f / (float)maxVal;
//printf("* maxVal = %d, scaleFactor = %f\n", maxVal, scaleFactor);
/* map the src pixel values to the equalized pixel values */
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
vx_uint8 *src_ptr = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_uint8 *dst_ptr = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
vx_uint32 equalized_int = cdf[(*src_ptr)];
*dst_ptr = (vx_uint8)(equalized_int * scaleFactor + 0.5f);
}
}
}
status |= vxCommitImagePatch(src, 0, 0, &src_addr, src_base);
status |= vxCommitImagePatch(dst, rect, 0, &dst_addr, dst_base);
vxReleaseRectangle(&rect);
}
return status;
}
static vx_status vxHistogramKernel(vx_node node, vx_reference *parameters, vx_uint32 num)
{
vx_status status = VX_FAILURE;
if (num == 2)
{
vx_image src_image = (vx_image)parameters[0];
vx_distribution dist = (vx_scalar)parameters[1];
vx_rectangle src_rect;
vx_imagepatch_addressing_t src_addr;
void *src_base = NULL, *dist_ptr = NULL;
vx_fourcc format = 0;
vx_uint32 y = 0, x = 0;
vx_uint32 offset = 0, range = 0, numBins = 0, window_size = 0;
vxQueryImage(src_image, VX_IMAGE_ATTRIBUTE_FORMAT, &format, sizeof(format));
vxQueryDistribution(dist, VX_DISTRIBUTION_ATTRIBUTE_BINS, &numBins, sizeof(numBins));
vxQueryDistribution(dist, VX_DISTRIBUTION_ATTRIBUTE_RANGE, &range, sizeof(range));
vxQueryDistribution(dist, VX_DISTRIBUTION_ATTRIBUTE_OFFSET, &offset, sizeof(offset));
vxQueryDistribution(dist, VX_DISTRIBUTION_ATTRIBUTE_WINDOW, &window_size, sizeof(window_size));
src_rect = vxGetValidRegionImage(src_image);
status = VX_SUCCESS;
status |= vxAccessImagePatch(src_image, src_rect, 0, &src_addr, &src_base);
status |= vxAccessDistribution(dist, &dist_ptr);
printf("distribution:%p bins:%u off:%u ws:%u range:%u\n", dist_ptr, numBins, offset, window_size, range);
if (status == VX_SUCCESS)
{
vx_int32 *dist_tmp = dist_ptr;
/* clear the distribution */
for (x = 0; x < numBins; x++)
{
dist_tmp[x] = 0;
}
for (y = 0; y < src_addr.dim_y; y++)
{
for (x = 0; x < src_addr.dim_x; x++)
{
if (format == FOURCC_U8)
{
vx_uint8 *src_ptr = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_uint8 pixel = *src_ptr;
if ((offset <= (vx_size)pixel) && ((vx_size)pixel < (offset+range)))
{
vx_size index = (pixel - (vx_uint16)offset) / window_size;
dist_tmp[index]++;
}
}
else if (format == FOURCC_U16)
{
vx_uint16 *src_ptr = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_uint16 pixel = *src_ptr;
if ((offset <= (vx_size)pixel) && ((vx_size)pixel < (offset+range)))
{
vx_size index = (pixel - (vx_uint16)offset) / window_size;
dist_tmp[index]++;
}
}
}
}
}
status |= vxCommitDistribution(dist, dist_ptr);
status |= vxCommitImagePatch(src_image, 0, 0, &src_addr, src_base);
vxReleaseParameter(&src_rect);
}
return status;
}
vx_status vxFReadImage(vx_array file, vx_image output)
{
vx_char *filename = NULL;
vx_size filename_stride = 0;
vx_uint8 *src = NULL;
vx_uint32 p = 0u, y = 0u;
vx_size planes = 0u;
vx_imagepatch_addressing_t addr = {0};
vx_df_image format = VX_DF_IMAGE_VIRT;
FILE *fp = NULL;
vx_char tmp[VX_MAX_FILE_NAME] = {0};
vx_char *ext = NULL;
vx_rectangle_t rect;
vx_uint32 width = 0, height = 0;
vx_status status = vxAccessArrayRange(file, 0, VX_MAX_FILE_NAME, &filename_stride, (void **)&filename, VX_READ_ONLY);
if (status != VX_SUCCESS || filename_stride != sizeof(vx_char))
{
vxAddLogEntry((vx_reference)file, VX_FAILURE, "Incorrect array "VX_FMT_REF"\n", file);
return VX_FAILURE;
}
fp = fopen(filename, "rb");
if (fp == NULL) {
vxAddLogEntry((vx_reference)file, VX_FAILURE, "Failed to open file %s\n",filename);
return VX_FAILURE;
}
vxQueryImage(output, VX_IMAGE_PLANES, &planes, sizeof(planes));
vxQueryImage(output, VX_IMAGE_FORMAT, &format, sizeof(format));
ext = strrchr(filename, '.');
if (ext && (strcmp(ext, ".pgm") == 0 || strcmp(ext, ".PGM") == 0))
{
FGETS(tmp, fp); // PX
FGETS(tmp, fp); // comment
FGETS(tmp, fp); // W H
sscanf(tmp, "%u %u", &width, &height);
FGETS(tmp, fp); // BPP
// ! \todo double check image size?
}
else if (ext && (strcmp(ext, ".yuv") == 0 ||
strcmp(ext, ".rgb") == 0 ||
strcmp(ext, ".bw") == 0))
{
sscanf(filename, "%*[^_]_%ux%u_%*s", &width, &height);
}
rect.start_x = rect.start_y = 0;
rect.end_x = width;
rect.end_y = height;
for (p = 0; p < planes; p++)
{
status = vxAccessImagePatch(output, &rect, p, &addr, (void **)&src, VX_WRITE_ONLY);
if (status == VX_SUCCESS)
{
for (y = 0; y < addr.dim_y; y+=addr.step_y)
{
vx_uint8 *srcp = vxFormatImagePatchAddress2d(src, 0, y, &addr);
vx_size len = ((addr.dim_x * addr.scale_x)/VX_SCALE_UNITY);
vx_size rlen = fread(srcp, addr.stride_x, len, fp);
if (rlen != len)
{
status = VX_FAILURE;
break;
}
}
if (status == VX_SUCCESS)
{
status = vxCommitImagePatch(output, &rect, p, &addr, src);
}
if (status != VX_SUCCESS)
{
break;
}
}
/* src pointer should be made NULL , otherwise the first plane data gets over written. */
src = NULL;
}
fclose(fp);
vxCommitArrayRange(file, 0, 0, filename);
return status;
}
// nodeless version of the Phase kernel
vx_status vxPhase(vx_image grad_x, vx_image grad_y, vx_image output)
{
vx_uint32 x;
vx_uint32 y;
vx_df_image format = 0;
vx_uint8* dst_base = NULL;
void* src_base_x = NULL;
void* src_base_y = NULL;
vx_imagepatch_addressing_t src_addr_x;
vx_imagepatch_addressing_t src_addr_y;
vx_imagepatch_addressing_t dst_addr;
vx_rectangle_t rect;
vx_status status = VX_FAILURE;
if (grad_x == 0 && grad_y == 0)
return VX_ERROR_INVALID_PARAMETERS;
status = VX_SUCCESS;
status |= vxQueryImage(grad_x, VX_IMAGE_FORMAT, &format, sizeof(format));
status |= vxGetValidRegionImage(grad_x, &rect);
status |= vxAccessImagePatch(grad_x, &rect, 0, &src_addr_x, &src_base_x, VX_READ_ONLY);
status |= vxAccessImagePatch(grad_y, &rect, 0, &src_addr_y, &src_base_y, VX_READ_ONLY);
status |= vxAccessImagePatch(output, &rect, 0, &dst_addr, (void **)&dst_base, VX_WRITE_ONLY);
for (y = 0; y < dst_addr.dim_y; y++)
{
for (x = 0; x < dst_addr.dim_x; x++)
{
void* in_x = vxFormatImagePatchAddress2d(src_base_x, x, y, &src_addr_x);
void* in_y = vxFormatImagePatchAddress2d(src_base_y, x, y, &src_addr_y);
vx_uint8* dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
/* -M_PI to M_PI */
double val_x;
double val_y;
if (format == VX_DF_IMAGE_F32)
{
val_x = (double)(((vx_float32*)in_x)[0]);
val_y = (double)(((vx_float32*)in_y)[0]);
}
else // VX_DF_IMAGE_S16
{
val_x = (double)(((vx_int16*)in_x)[0]);
val_y = (double)(((vx_int16*)in_y)[0]);
}
double arct = atan2(val_y,val_x);
/* 0 - TAU */
double norm = arct;
if (arct < 0.0f)
{
norm = VX_TAU + arct;
}
/* 0.0 - 1.0 */
norm = norm / VX_TAU;
/* 0 - 255 */
*dst = (vx_uint8)((vx_uint32)(norm * 256u + 0.5) & 0xFFu);
if (val_y != 0 || val_x != 0)
{
VX_PRINT(VX_ZONE_INFO, "atan2(%d,%d) = %lf [norm=%lf] dst=%02x\n", val_y, val_x, arct, norm, *dst);
}
}
}
status |= vxCommitImagePatch(grad_x, NULL, 0, &src_addr_x, src_base_x);
status |= vxCommitImagePatch(grad_y, NULL, 0, &src_addr_y, src_base_y);
status |= vxCommitImagePatch(output, &rect, 0, &dst_addr, dst_base);
return status;
}
vx_status vxFWriteImage(vx_image input, vx_array file)
{
vx_char *filename = NULL;
vx_size filename_stride = 0;
vx_uint8 *src[4] = {NULL, NULL, NULL, NULL};
vx_uint32 p, y, sx, ex, sy, ey, width, height;
vx_size planes;
vx_imagepatch_addressing_t addr[4];
vx_df_image format;
FILE *fp = NULL;
vx_char *ext = NULL;
size_t wrote = 0ul;
vx_rectangle_t rect;
vx_status status = vxAccessArrayRange(file, 0, VX_MAX_FILE_NAME, &filename_stride, (void **)&filename, VX_READ_ONLY);
if (status != VX_SUCCESS || filename_stride != sizeof(vx_char))
{
vxCommitArrayRange(file, 0, 0, filename);
vxAddLogEntry((vx_reference)file, VX_FAILURE, "Incorrect array "VX_FMT_REF"\n", file);
return VX_FAILURE;
}
//VX_PRINT(VX_ZONE_INFO, "filename=%s\n",filename);
fp = fopen(filename, "wb+");
if (fp == NULL) {
vxCommitArrayRange(file, 0, 0, filename);
vxAddLogEntry((vx_reference)file, VX_FAILURE, "Failed to open file %s\n",filename);
return VX_FAILURE;
}
status |= vxQueryImage(input, VX_IMAGE_WIDTH, &width, sizeof(width));
status |= vxQueryImage(input, VX_IMAGE_HEIGHT, &height, sizeof(height));
status |= vxQueryImage(input, VX_IMAGE_PLANES, &planes, sizeof(planes));
status |= vxQueryImage(input, VX_IMAGE_FORMAT, &format, sizeof(format));
status |= vxGetValidRegionImage(input, &rect);
sx = rect.start_x;
sy = rect.start_y;
ex = rect.end_x;
ey = rect.end_y;
ext = strrchr(filename, '.');
if (ext && (strcmp(ext, ".pgm") == 0 || strcmp(ext, ".PGM") == 0))
{
fprintf(fp, "P5\n# %s\n",filename);
fprintf(fp, "%u %u\n", width, height);
if (format == VX_DF_IMAGE_U8)
fprintf(fp, "255\n");
else if (format == VX_DF_IMAGE_S16)
fprintf(fp, "65535\n");
else if (format == VX_DF_IMAGE_U16)
fprintf(fp, "65535\n");
}
for (p = 0u; p < planes; p++)
{
status |= vxAccessImagePatch(input, &rect, p, &addr[p], (void **)&src[p], VX_READ_ONLY);
}
for (p = 0u; (p < planes) && (status == VX_SUCCESS); p++)
{
size_t len = addr[p].stride_x * (addr[p].dim_x * addr[p].scale_x)/VX_SCALE_UNITY;
for (y = 0u; y < height; y+=addr[p].step_y)
{
vx_uint32 i = 0;
vx_uint8 *ptr = NULL;
uint8_t value = 0u;
if (y < sy || y >= ey)
{
for (i = 0; i < width; ++i) {
wrote += fwrite(&value, sizeof(value), 1, fp);
}
continue;
}
for (i = 0; i < sx; ++i)
wrote += fwrite(&value, sizeof(value), 1, fp);
ptr = vxFormatImagePatchAddress2d(src[p], 0, y - sy, &addr[p]);
wrote += fwrite(ptr, 1, len, fp);
for (i = 0; i < width - ex; ++i)
wrote += fwrite(&value, sizeof(value), 1, fp);
}
if (wrote == 0)
{
vxAddLogEntry((vx_reference)file, VX_FAILURE, "Failed to write to file!\n");
status = VX_FAILURE;
break;
}
if (status == VX_FAILURE)
{
vxAddLogEntry((vx_reference)file, VX_FAILURE, "Failed to write image to file correctly\n");
break;
}
}
for (p = 0u; p < planes; p++)
{
status |= vxCommitImagePatch(input, NULL, p, &addr[p], src[p]);
}
if (status != VX_SUCCESS)
{
vxAddLogEntry((vx_reference)file, VX_FAILURE, "Failed to write image to file correctly\n");
}
fflush(fp);
fclose(fp);
if (vxCommitArrayRange(file, 0, 0, filename) != VX_SUCCESS)
{
vxAddLogEntry((vx_reference)file, VX_FAILURE, "Failed to release handle to filename array!\n");
}
return status;
}
static vx_status vxCheckImageKernel(vx_node node, vx_reference *parameters, vx_uint32 num)
{
vx_status status = VX_SUCCESS;
if (num == 3)
{
vx_image image = (vx_image)parameters[0];
vx_scalar fill = (vx_scalar)parameters[1];
vx_scalar errs = (vx_scalar)parameters[2];
packed_value_u value;
vx_uint32 planes = 0u, count = 0u, errors = 0u;
vx_uint32 x = 0u, y = 0u, p = 0u;
vx_int32 i = 0;
vx_imagepatch_addressing_t addr;
vx_rectangle rect;
value.dword[0] = 0xDEADBEEF;
vxAccessScalarValue(fill, &value.dword[0]);
vxQueryImage(image, VX_IMAGE_ATTRIBUTE_PLANES, &planes, sizeof(planes));
rect = vxGetValidRegionImage(image);
for (p = 0u; (p < planes) && (rect); p++)
{
void *ptr = NULL;
status = vxAccessImagePatch(image, rect, p, &addr, &ptr);
if ((status == VX_SUCCESS) && (ptr))
{
for (y = 0; y < addr.dim_y; y+=addr.step_y)
{
for (x = 0; x < addr.dim_x; x+=addr.step_x)
{
vx_uint8 *pixel = vxFormatImagePatchAddress2d(ptr, x, y, &addr);
for (i = 0; i < addr.stride_x; i++)
{
count++;
if (pixel[i] != value.bytes[i])
{
errors++;
}
}
}
}
if (errors > 0)
{
vxAddLogEntry(vxGetContext(node), VX_FAILURE, "Checked %p of %u sub-pixels with 0x%08x with %u errors\n", ptr, count, value.dword, errors);
}
vxCommitScalarValue(errs, &errors);
status = vxCommitImagePatch(image, 0, p, &addr, ptr);
if (status != VX_SUCCESS)
{
vxAddLogEntry(vxGetContext(node), VX_FAILURE, "Failed to set image patch for "VX_FMT_REF"\n", image);
}
}
else
{
vxAddLogEntry(vxGetContext(node), VX_FAILURE, "Failed to get image patch for "VX_FMT_REF"\n", image);
}
}
vxReleaseRectangle(&rect);
if (errors > 0)
{
status = VX_FAILURE;
}
}
return status;
}
// nodeless version of the Fast9Corners kernel
vx_status vxFast9Corners(vx_image src, vx_scalar sens, vx_scalar nonm, vx_array points,
vx_scalar s_num_corners, vx_border_mode_t *bordermode)
{
vx_float32 b = 0.0f;
vx_imagepatch_addressing_t src_addr;
void *src_base = NULL;
vx_rectangle_t rect;
vx_uint8 tolerance = 0;
vx_bool do_nonmax;
vx_uint32 num_corners = 0;
vx_size dst_capacity = 0;
vx_keypoint_t kp;
vx_status status = vxGetValidRegionImage(src, &rect);
status |= vxReadScalarValue(sens, &b);
status |= vxReadScalarValue(nonm, &do_nonmax);
/* remove any pre-existing points */
status |= vxTruncateArray(points, 0);
status |= vxAccessImagePatch(src, &rect, 0, &src_addr, &src_base, VX_READ_ONLY);
tolerance = (vx_uint8)b;
status |= vxQueryArray(points, VX_ARRAY_ATTRIBUTE_CAPACITY, &dst_capacity, sizeof(dst_capacity));
memset(&kp, 0, sizeof(kp));
if (status == VX_SUCCESS)
{
/*! \todo implement other Fast9 Corners border modes */
if (bordermode->mode == VX_BORDER_MODE_UNDEFINED)
{
vx_int32 y, x;
for (y = APERTURE; y < (vx_int32)(src_addr.dim_y - APERTURE); y++)
{
for (x = APERTURE; x < (vx_int32)(src_addr.dim_x - APERTURE); x++)
{
vx_uint8 strength = vxGetFastCornerStrength(x, y, src_base, &src_addr, tolerance);
if (strength > 0)
{
if (do_nonmax)
{
if (strength >= vxGetFastCornerStrength(x-1, y-1, src_base, &src_addr, tolerance) &&
strength >= vxGetFastCornerStrength(x, y-1, src_base, &src_addr, tolerance) &&
strength >= vxGetFastCornerStrength(x+1, y-1, src_base, &src_addr, tolerance) &&
strength >= vxGetFastCornerStrength(x-1, y, src_base, &src_addr, tolerance) &&
strength > vxGetFastCornerStrength(x+1, y, src_base, &src_addr, tolerance) &&
strength > vxGetFastCornerStrength(x-1, y+1, src_base, &src_addr, tolerance) &&
strength > vxGetFastCornerStrength(x, y+1, src_base, &src_addr, tolerance) &&
strength > vxGetFastCornerStrength(x+1, y+1, src_base, &src_addr, tolerance))
;
else
continue;
}
if (num_corners < dst_capacity)
{
kp.x = x;
kp.y = y;
kp.strength = strength;
status |= vxAddArrayItems(points, 1, &kp, 0);
}
num_corners++;
}
}
}
}
else
{
status = VX_ERROR_NOT_IMPLEMENTED;
}
if (s_num_corners)
status |= vxWriteScalarValue(s_num_corners, &num_corners);
status |= vxCommitImagePatch(src, NULL, 0, &src_addr, src_base);
}
return status;
}
// Compare rectangular region specified within an image and return number of pixels mismatching
size_t CompareImage(vx_image image, vx_rectangle_t * rectRegion, vx_uint8 * refImage, float errLimitMin, float errLimitMax, int frameNumber, const char * fileNameRef)
{
// get number of planes, image format, and pixel type
vx_df_image format = VX_DF_IMAGE_VIRT;
vx_size num_planes = 0; vx_uint32 image_width = 0, image_height = 0;
ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_WIDTH, &image_width, sizeof(image_width)));
ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_HEIGHT, &image_height, sizeof(image_height)));
ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_FORMAT, &format, sizeof(format)));
ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_PLANES, &num_planes, sizeof(num_planes)));
// set pixel type and compute frame size in bytes
vx_enum pixelType = VX_TYPE_UINT8; // default
if (format == VX_DF_IMAGE_S16) pixelType = VX_TYPE_INT16;
else if (format == VX_DF_IMAGE_U16) pixelType = VX_TYPE_UINT16;
else if (format == VX_DF_IMAGE_S32) pixelType = VX_TYPE_INT32;
else if (format == VX_DF_IMAGE_U32) pixelType = VX_TYPE_UINT32;
else if (format == VX_DF_IMAGE_F32_AMD || format == VX_DF_IMAGE_F32x3_AMD) pixelType = VX_TYPE_FLOAT32;
// compare plane by plane
vx_size errorPixelCountTotal = 0;
vx_uint8 * pRefPlane = refImage;
for (vx_uint32 plane = 0; plane < (vx_uint32)num_planes; plane++) {
vx_imagepatch_addressing_t addr = { 0 };
vx_uint8 * base_ptr = nullptr;
ERROR_CHECK(vxAccessImagePatch(image, rectRegion, plane, &addr, (void **)&base_ptr, VX_READ_ONLY));
vx_uint32 region_width = ((addr.dim_x * addr.scale_x) / VX_SCALE_UNITY);
vx_uint32 region_height = (addr.dim_y * addr.scale_y) / VX_SCALE_UNITY;
vx_uint32 plane_width = ((image_width * addr.scale_x) / VX_SCALE_UNITY);
vx_uint32 plane_height = ((image_height * addr.scale_y) / VX_SCALE_UNITY);
vx_uint32 plane_width_in_bytes = (format == VX_DF_IMAGE_U1_AMD) ? ((plane_width + 7) >> 3) : (plane_width * addr.stride_x);
vx_uint32 start_x = ((rectRegion->start_x * addr.scale_x) / VX_SCALE_UNITY);
vx_uint32 start_y = ((rectRegion->start_y * addr.scale_y) / VX_SCALE_UNITY);
vx_uint8 * pRef = pRefPlane + start_y * plane_width_in_bytes + start_x * addr.stride_x;
vx_size errorPixelCount = 0;
if (pixelType == VX_TYPE_INT16) {
errorPixelCount = ComparePixels((vx_int16 *)base_ptr, addr.stride_y, (vx_int16 *)pRef, plane_width_in_bytes, region_width, region_height, (vx_int32)errLimitMin, (vx_int32)errLimitMax);
}
else if (pixelType == VX_TYPE_UINT16) {
errorPixelCount = ComparePixels((vx_uint16 *)base_ptr, addr.stride_y, (vx_uint16 *)pRef, plane_width_in_bytes, region_width, region_height, (vx_int32)errLimitMin, (vx_int32)errLimitMax);
}
else if (pixelType == VX_TYPE_INT32) {
errorPixelCount = ComparePixels((vx_int32 *)base_ptr, addr.stride_y, (vx_int32 *)pRef, plane_width_in_bytes, region_width, region_height, (vx_int64)errLimitMin, (vx_int64)errLimitMax);
}
else if (pixelType == VX_TYPE_UINT32) {
errorPixelCount = ComparePixels((vx_uint32 *)base_ptr, addr.stride_y, (vx_uint32 *)pRef, plane_width_in_bytes, region_width, region_height, (vx_int64)errLimitMin, (vx_int64)errLimitMax);
}
else if (pixelType == VX_TYPE_FLOAT32) {
errorPixelCount = ComparePixels((vx_float32 *)base_ptr, addr.stride_y, (vx_float32 *)pRef, plane_width_in_bytes, region_width, region_height, (vx_float32)errLimitMin, (vx_float32)errLimitMax);
}
else if (format == VX_DF_IMAGE_U1_AMD) {
errorPixelCount = ComparePixelsU001((vx_uint8 *)base_ptr, addr.stride_y, (vx_uint8 *)pRef, plane_width_in_bytes, region_width, region_height);
}
else {
errorPixelCount = ComparePixels((vx_uint8 *)base_ptr, addr.stride_y, (vx_uint8 *)pRef, plane_width_in_bytes, region_width, region_height, (vx_int32)errLimitMin, (vx_int32)errLimitMax);
}
ERROR_CHECK(vxCommitImagePatch(image, rectRegion, plane, &addr, base_ptr));
// report results
errorPixelCountTotal += errorPixelCount;
if (errorPixelCount > 0) {
char name[64]; vxGetReferenceName((vx_reference)image, name, sizeof(name));
printf("ERROR: Image COMPARE MISMATCHED %s plane#%d " VX_FMT_SIZE "-pixel(s) with frame#%d of %s\n", name, plane, errorPixelCount, frameNumber, fileNameRef ? fileNameRef : "???");
}
// skip to begnning of next plane
pRefPlane += plane_height * plane_width_in_bytes;
}
return errorPixelCountTotal;
}
// nodeless version of the ConvertDepth kernel
vx_status vxConvertDepth(vx_image input, vx_image output, vx_scalar spol, vx_scalar sshf)
{
vx_uint32 y, x;
void *dst_base = NULL;
void *src_base = NULL;
vx_imagepatch_addressing_t dst_addr, src_addr;
vx_rectangle_t rect;
vx_enum format[2];
vx_enum policy = 0;
vx_int32 shift = 0;
vx_status status = VX_SUCCESS;
status |= vxReadScalarValue(spol, &policy);
status |= vxReadScalarValue(sshf, &shift);
status |= vxQueryImage(input, VX_IMAGE_ATTRIBUTE_FORMAT, &format[0], sizeof(format[0]));
status |= vxQueryImage(output, VX_IMAGE_ATTRIBUTE_FORMAT, &format[1], sizeof(format[1]));
status |= vxGetValidRegionImage(input, &rect);
status |= vxAccessImagePatch(input, &rect, 0, &src_addr, &src_base, VX_READ_ONLY);
status |= vxAccessImagePatch(output, &rect, 0, &dst_addr, &dst_base, VX_WRITE_ONLY);
for (y = 0; y < src_addr.dim_y; y++)
{
for (x = 0; x < src_addr.dim_x; x++)
{
if ((format[0] == VX_DF_IMAGE_U8) && (format[1] == VX_DF_IMAGE_U16))
{
vx_uint8 *src = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_uint16 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
*dst = ((vx_uint16)(*src)) << shift;
}
else if ((format[0] == VX_DF_IMAGE_U8) && (format[1] == VX_DF_IMAGE_S16))
{
vx_uint8 *src = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_int16 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
*dst = ((vx_int16)(*src)) << shift;
}
else if ((format[0] == VX_DF_IMAGE_U8) && (format[1] == VX_DF_IMAGE_U32))
{
vx_uint8 *src = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_uint32 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
*dst = ((vx_uint32)(*src)) << shift;
}
else if ((format[0] == VX_DF_IMAGE_U16) && (format[1] == VX_DF_IMAGE_U32))
{
vx_uint16 *src = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_uint32 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
*dst = ((vx_uint32)(*src)) << shift;
}
else if ((format[0] == VX_DF_IMAGE_S16) && (format[1] == VX_DF_IMAGE_S32))
{
vx_int16 *src = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_int32 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
*dst = ((vx_int32)(*src)) << shift;
}
else if ((format[0] == VX_DF_IMAGE_U16) && (format[1] == VX_DF_IMAGE_U8))
{
vx_uint16 *src = vxFormatImagePatchAddress2d(src_base, x, y, &src_addr);
vx_uint8 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
if (policy == VX_CONVERT_POLICY_WRAP)
{
*dst = (vx_uint8)((*src) >> shift);
}
else if (policy == VX_CONVERT_POLICY_SATURATE)
{
vx_uint16 value = (*src) >> shift;
value = (value > UINT8_MAX ? UINT8_MAX : value);
*dst = (vx_uint8)value;
}
static vx_status vxEdgeTrace(vx_image norm, vx_threshold threshold, vx_image output)
{
vx_rectangle_t rect;
vx_imagepatch_addressing_t norm_addr, output_addr;
void *norm_base = NULL, *output_base = NULL;
vx_uint32 y = 0, x = 0;
vx_int32 lower = 0, upper = 0;
vx_status status = VX_SUCCESS;
vxQueryThreshold(threshold, VX_THRESHOLD_ATTRIBUTE_THRESHOLD_LOWER, &lower, sizeof(lower));
vxQueryThreshold(threshold, VX_THRESHOLD_ATTRIBUTE_THRESHOLD_UPPER, &upper, sizeof(upper));
vxGetValidRegionImage(norm, &rect);
status |= vxAccessImagePatch(norm, &rect, 0, &norm_addr, &norm_base, VX_READ_ONLY);
status |= vxAccessImagePatch(output, &rect, 0, &output_addr, &output_base, VX_WRITE_ONLY);
if (status == VX_SUCCESS) {
const vx_uint8 NO = 0, MAYBE = 127, YES = 255;
/* Initially we add all YES pixels to the stack. Later we only add MAYBE
pixels to it, and we reset their state to YES afterwards; so we can never
add the same pixel more than once. That means that the stack size is bounded
by the image size. */
vx_uint32 (*tracing_stack)[2] = malloc(output_addr.dim_y * output_addr.dim_x * sizeof *tracing_stack);
vx_uint32 (*stack_top)[2] = tracing_stack;
for (y = 0; y < norm_addr.dim_y; y++)
for (x = 0; x < norm_addr.dim_x; x++)
{
vx_uint16 *norm_ptr = vxFormatImagePatchAddress2d(norm_base, x, y, &norm_addr);
vx_uint8 *output_ptr = vxFormatImagePatchAddress2d(output_base, x, y, &output_addr);
if (*norm_ptr > upper)
{
*output_ptr = YES;
(*stack_top)[0] = x;
(*stack_top)[1] = y;
++stack_top;
}
else if (*norm_ptr <= lower)
{
*output_ptr = NO;
}
else
{
*output_ptr = MAYBE;
}
}
while (stack_top != tracing_stack) {
int i;
--stack_top;
x = (*stack_top)[0];
y = (*stack_top)[1];
for (i = 0; i < dimof(dir_offsets); ++i) {
const struct offset_t offset = dir_offsets[i];
vx_uint32 new_x, new_y;
vx_uint8 *output_ptr;
if (x == 0 && offset.x < 0) continue;
if (x == output_addr.dim_x - 1 && offset.x > 0) continue;
if (y == 0 && offset.y < 0) continue;
if (y == output_addr.dim_y - 1 && offset.y > 0) continue;
new_x = x + offset.x;
new_y = y + offset.y;
output_ptr = vxFormatImagePatchAddress2d(output_base, new_x, new_y, &output_addr);
if (*output_ptr != MAYBE) continue;
*output_ptr = YES;
(*stack_top)[0] = new_x;
(*stack_top)[1] = new_y;
++stack_top;
}
}
free(tracing_stack);
for (y = 0; y < output_addr.dim_y; y++)
for (x = 0; x < output_addr.dim_x; x++)
{
vx_uint8 *output_ptr = vxFormatImagePatchAddress2d(output_base, x, y, &output_addr);
if (*output_ptr == MAYBE) *output_ptr = NO;
}
status |= vxCommitImagePatch(norm, 0, 0, &norm_addr, norm_base);
status |= vxCommitImagePatch(output, &rect, 0, &output_addr, output_base);
}
return status;
}
// nodeless version of NonLinearFilter kernel
vx_status vxNonLinearFilter(vx_scalar function, vx_image src, vx_matrix mask, vx_image dst, vx_border_t *border)
{
vx_uint32 y, x;
void *src_base = NULL;
void *dst_base = NULL;
vx_imagepatch_addressing_t src_addr, dst_addr;
vx_rectangle_t rect;
vx_uint32 low_x = 0, low_y = 0, high_x, high_y;
vx_uint8 m[C_MAX_NONLINEAR_DIM * C_MAX_NONLINEAR_DIM];
vx_uint8 v[C_MAX_NONLINEAR_DIM * C_MAX_NONLINEAR_DIM];
vx_status status = vxGetValidRegionImage(src, &rect);
status |= vxAccessImagePatch(src, &rect, 0, &src_addr, &src_base, VX_READ_ONLY);
status |= vxAccessImagePatch(dst, &rect, 0, &dst_addr, &dst_base, VX_WRITE_ONLY);
vx_enum func = 0;
status |= vxCopyScalar(function, &func, VX_READ_ONLY, VX_MEMORY_TYPE_HOST);
vx_size mrows, mcols;
vx_enum mtype = 0;
status |= vxQueryMatrix(mask, VX_MATRIX_ROWS, &mrows, sizeof(mrows));
status |= vxQueryMatrix(mask, VX_MATRIX_COLUMNS, &mcols, sizeof(mcols));
status |= vxQueryMatrix(mask, VX_MATRIX_TYPE, &mtype, sizeof(mtype));
vx_coordinates2d_t origin;
status |= vxQueryMatrix(mask, VX_MATRIX_ORIGIN, &origin, sizeof(origin));
if ((mtype != VX_TYPE_UINT8) || (sizeof(m) < mrows * mcols))
status = VX_ERROR_INVALID_PARAMETERS;
status |= vxCopyMatrix(mask, m, VX_READ_ONLY, VX_MEMORY_TYPE_HOST);
if (status == VX_SUCCESS)
{
vx_size rx0 = origin.x;
vx_size ry0 = origin.y;
vx_size rx1 = mcols - origin.x - 1;
vx_size ry1 = mrows - origin.y - 1;
high_x = src_addr.dim_x;
high_y = src_addr.dim_y;
if (border->mode == VX_BORDER_UNDEFINED)
{
low_x += rx0;
low_y += ry0;
high_x -= rx1;
high_y -= ry1;
vxAlterRectangle(&rect, (vx_int32)rx0, (vx_int32)ry0, -(vx_int32)rx1, -(vx_int32)ry1);
}
for (y = low_y; y < high_y; y++)
{
for (x = low_x; x < high_x; x++)
{
vx_uint8 *dst = vxFormatImagePatchAddress2d(dst_base, x, y, &dst_addr);
vx_int32 count = readMaskedRectangle_U8(src_base, &src_addr, border, VX_DF_IMAGE_U8, x, y, rx0, ry0, rx1, ry1, m, v);
qsort(v, count, sizeof(vx_uint8), vx_uint8_compare);
switch (func)
{
case VX_NONLINEAR_FILTER_MIN: *dst = v[0]; break; /* minimal value */
case VX_NONLINEAR_FILTER_MAX: *dst = v[count - 1]; break; /* maximum value */
case VX_NONLINEAR_FILTER_MEDIAN: *dst = v[count / 2]; break; /* pick the middle value */
}
}
}
}
status |= vxCommitImagePatch(src, NULL, 0, &src_addr, src_base);
status |= vxCommitImagePatch(dst, &rect, 0, &dst_addr, dst_base);
return status;
}
