void imlib_edge_simple(image_t *src, rectangle_t *roi, int low_thresh, int high_thresh)
{
imlib_morph(src, 1, kernel_high_pass_3, 1.0f, 0.0f, false, 0, false, NULL);
list_t thresholds;
list_init(&thresholds, sizeof(color_thresholds_list_lnk_data_t));
color_thresholds_list_lnk_data_t lnk_data;
lnk_data.LMin=low_thresh;
lnk_data.LMax=high_thresh;
list_push_back(&thresholds, &lnk_data);
imlib_binary(src, src, &thresholds, false, false, NULL);
list_free(&thresholds);
imlib_erode(src, 1, 2, NULL);
}
static mp_obj_t py_image_binary(mp_obj_t image_obj, mp_obj_t threshold)
{
image_t *image;
/* sanity checks */
PY_ASSERT_TRUE(sensor.framesize <= FRAMESIZE_QCIF);
PY_ASSERT_TRUE(sensor.pixformat == PIXFORMAT_GRAYSCALE);
/* read arguments */
image = py_image_cobj(image_obj);
int thresh = mp_obj_get_int(threshold);
/* Threshold image */
imlib_binary(image, thresh);
return mp_const_none;
}
static mp_obj_t py_image_binary(mp_obj_t image_obj, mp_obj_t threshold)
{
image_t *image;
/* sanity checks */
PY_ASSERT_TRUE_MSG(sensor.pixformat == PIXFORMAT_GRAYSCALE,
"This function is only supported on GRAYSCALE images");
PY_ASSERT_TRUE_MSG(sensor.framesize <= OMV_MAX_RAW_FRAME,
"This function is only supported on "OMV_MAX_RAW_FRAME_STR" and smaller frames");
/* read arguments */
image = py_image_cobj(image_obj);
int thresh = mp_obj_get_int(threshold);
/* Threshold image */
imlib_binary(image, thresh);
return mp_const_none;
}
void imlib_remove_shadows(image_t *img, const char *path, image_t *other, int scalar, bool single)
{
if (!single) {
imlib_remove_shadows_line_op_state_t state;
for (int i = 0; i < imlib_remove_shadows_kernel_size; i++) {
state.img_lines[i] = fb_alloc(img->w * sizeof(uint16_t));
state.other_lines[i] = fb_alloc(img->w * sizeof(uint16_t));
state.out_lines[i] = fb_alloc(img->w * sizeof(uint16_t));
}
state.lines_processed = 0;
imlib_image_operation(img, path, other, scalar, imlib_remove_shadows_line_op, &state);
for (int i = 0; i < imlib_remove_shadows_kernel_size; i++) {
fb_free();
fb_free();
fb_free();
}
} else {
// Create Shadow Mask
image_t temp_image;
temp_image.w = img->w;
temp_image.h = img->h;
temp_image.bpp = img->bpp;
temp_image.data = fb_alloc(image_size(img));
memcpy(temp_image.data, img->data, image_size(img));
rectangle_t r;
r.x = 0;
r.y = 0;
r.w = temp_image.w;
r.h = temp_image.h;
histogram_t h;
h.LBinCount = COLOR_L_MAX - COLOR_L_MIN + 1;
h.ABinCount = COLOR_A_MAX - COLOR_A_MIN + 1;
h.BBinCount = COLOR_B_MAX - COLOR_B_MIN + 1;
h.LBins = fb_alloc(h.LBinCount * sizeof(float));
h.ABins = fb_alloc(h.ABinCount * sizeof(float));
h.BBins = fb_alloc(h.BBinCount * sizeof(float));
imlib_get_histogram(&h, &temp_image, &r, NULL, false);
statistics_t s;
imlib_get_statistics(&s, temp_image.bpp, &h);
int sum = 0;
int mean = s.LMean * 0.8f;
for (int y = 0, yy = temp_image.h; y < yy; y++) {
uint16_t *row_ptr = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(&temp_image, y);
for (int x = 0, xx = temp_image.w; x < xx; x++) {
sum += COLOR_RGB565_TO_L(IMAGE_GET_RGB565_PIXEL_FAST(row_ptr, x)) < mean;
}
}
if (sum > ((temp_image.w * temp_image.h) / 20)) { // Don't do anything if the image is mostly flat.
threshold_t t;
imlib_get_threshold(&t, temp_image.bpp, &h);
list_t thresholds;
list_init(&thresholds, sizeof(color_thresholds_list_lnk_data_t));
color_thresholds_list_lnk_data_t lnk_data;
lnk_data.LMin = COLOR_L_MIN;
lnk_data.AMin = COLOR_A_MIN;
lnk_data.BMin = COLOR_B_MIN;
lnk_data.LMax = t.LValue;
lnk_data.AMax = COLOR_A_MAX;
lnk_data.BMax = COLOR_B_MAX;
list_push_back(&thresholds, &lnk_data);
imlib_binary(&temp_image, &temp_image, &thresholds, false, false, NULL);
list_free(&thresholds);
imlib_erode(&temp_image, 3, 30, NULL);
imlib_dilate(&temp_image, 1, 1, NULL);
// Get Shadow Average
image_t temp_image_2;
temp_image_2.w = temp_image.w;
temp_image_2.h = temp_image.h;
temp_image_2.bpp = temp_image.bpp;
temp_image_2.data = fb_alloc(image_size(&temp_image));
memcpy(temp_image_2.data, temp_image.data, image_size(&temp_image));
imlib_erode(&temp_image_2, 3, 48, NULL);
int shadow_r_sum = 0;
int shadow_g_sum = 0;
int shadow_b_sum = 0;
int shadow_count = 0;
for (int y = 0, yy = temp_image_2.h; y < yy; y++) {
uint16_t *row_ptr = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(&temp_image_2, y);
uint16_t *row_ptr_2 = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, y);
for (int x = 0, xx = temp_image_2.w; x < xx; x++) {
if (IMAGE_GET_RGB565_PIXEL_FAST(row_ptr, x)) {
int pixel = IMAGE_GET_RGB565_PIXEL_FAST(row_ptr_2, x);
int r = COLOR_RGB565_TO_R8(pixel);
int g = COLOR_RGB565_TO_G8(pixel);
int b = COLOR_RGB565_TO_R8(pixel);
shadow_r_sum += r;
shadow_g_sum += g;
shadow_b_sum += b;
shadow_count += 1;
}
}
}
memcpy(temp_image_2.data, temp_image.data, image_size(&temp_image));
imlib_invert(&temp_image_2);
imlib_erode(&temp_image_2, 5, 120, NULL);
imlib_invert(&temp_image_2);
imlib_b_xor(&temp_image_2, NULL, &temp_image, 0, NULL);
imlib_erode(&temp_image_2, 2, 24, NULL);
int not_shadow_r_sum = 0;
int not_shadow_g_sum = 0;
int not_shadow_b_sum = 0;
int not_shadow_count = 0;
for (int y = 0, yy = temp_image_2.h; y < yy; y++) {
uint16_t *row_ptr = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(&temp_image_2, y);
uint16_t *row_ptr_2 = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, y);
for (int x = 0, xx = temp_image_2.w; x < xx; x++) {
if (IMAGE_GET_RGB565_PIXEL_FAST(row_ptr, x)) {
int pixel = IMAGE_GET_RGB565_PIXEL_FAST(row_ptr_2, x);
int r = COLOR_RGB565_TO_R8(pixel);
int g = COLOR_RGB565_TO_G8(pixel);
int b = COLOR_RGB565_TO_R8(pixel);
not_shadow_r_sum += r;
not_shadow_g_sum += g;
not_shadow_b_sum += b;
not_shadow_count += 1;
}
}
}
// Fill in the umbra... (inner part of the shadow)...
memcpy(temp_image_2.data, temp_image.data, image_size(&temp_image));
imlib_mean_filter(&temp_image, 2, false, 0, false, NULL);
if (shadow_count && not_shadow_count) {
float shadow_r_average = ((float) shadow_r_sum) / ((float) shadow_count);
float shadow_g_average = ((float) shadow_g_sum) / ((float) shadow_count);
float shadow_b_average = ((float) shadow_b_sum) / ((float) shadow_count);
float not_shadow_r_average = ((float) not_shadow_r_sum) / ((float) not_shadow_count);
float not_shadow_g_average = ((float) not_shadow_g_sum) / ((float) not_shadow_count);
float not_shadow_b_average = ((float) not_shadow_b_sum) / ((float) not_shadow_count);
float diff_r = not_shadow_r_average - shadow_r_average;
float diff_g = not_shadow_g_average - shadow_g_average;
float diff_b = not_shadow_b_average - shadow_b_average;
for (int y = 0; y < img->h; y++) {
uint16_t *row_ptr = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(&temp_image, y);
uint16_t *row_ptr_2 = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, y);
for (int x = 0; x < img->w; x++) {
float alpha = ((float) (COLOR_RGB565_TO_Y(IMAGE_GET_RGB565_PIXEL_FAST(row_ptr, x)) - COLOR_Y_MIN)) / ((float) (COLOR_Y_MAX - COLOR_Y_MIN));
int pixel = IMAGE_GET_RGB565_PIXEL_FAST(row_ptr_2, x);
int r = COLOR_RGB565_TO_R8(pixel);
int g = COLOR_RGB565_TO_G8(pixel);
int b = COLOR_RGB565_TO_B8(pixel);
int r_new = IM_MIN(IM_MAX(r + (diff_r * alpha), COLOR_R8_MIN), COLOR_R8_MAX);
int g_new = IM_MIN(IM_MAX(g + (diff_g * alpha), COLOR_G8_MIN), COLOR_G8_MAX);
int b_new = IM_MIN(IM_MAX(b + (diff_b * alpha), COLOR_B8_MIN), COLOR_B8_MAX);
IMAGE_PUT_RGB565_PIXEL_FAST(row_ptr_2, x, COLOR_R8_G8_B8_TO_RGB565(r_new, g_new, b_new));
}
}
}
// Fill in the penumbra... (outer part of the shadow)...
memcpy(temp_image.data, temp_image_2.data, image_size(&temp_image_2));
imlib_erode(&temp_image_2, 1, 8, NULL);
imlib_b_xor(&temp_image, NULL, &temp_image_2, 0, NULL);
imlib_dilate(&temp_image, 3, 0, NULL);
imlib_median_filter(img, 2, 12, false, 0, false, &temp_image);
fb_free(); // temp_image_2
}
fb_free(); // BBins
fb_free(); // ABins
fb_free(); // LBins
fb_free(); // temp_image
}
}
