static void capture_read_data_cb(struct libusb_transfer *transfer)
{
struct fpi_ssm *ssm = transfer->user_data;
struct fp_img_dev *dev = ssm->priv;
unsigned char *data = transfer->buffer;
struct fp_img *img;
if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
fp_dbg("request is not completed, %d", transfer->status);
fpi_ssm_mark_aborted(ssm, -EIO);
goto out;
} else if (transfer->length != transfer->actual_length) {
fp_dbg("expected %d, sent %d bytes", transfer->length, transfer->actual_length);
fpi_ssm_mark_aborted(ssm, -EPROTO);
goto out;
}
img = fpi_img_new(IMAGE_SIZE);
memcpy(img->data, data, IMAGE_SIZE);
fpi_imgdev_image_captured(dev, img);
fpi_imgdev_report_finger_status(dev, FALSE);
fpi_ssm_mark_completed(ssm);
out:
g_free(transfer->buffer);
libusb_free_transfer(transfer);
}
/** \ingroup img
* Get a binarized form of a standardized scanned image. This is where the
* fingerprint image has been "enhanced" and is a set of pure black ridges
* on a pure white background. Internally, image processing happens on top
* of the binarized image.
*
* The image must have been \ref img_std "standardized" otherwise this function
* will fail.
*
* It is safe to binarize an image and free the original while continuing
* to use the binarized version.
*
* You cannot binarize an image twice.
*
* \param img a standardized image
* \returns a new image representing the binarized form of the original, or
* NULL on error. Must be freed with fp_img_free() after use.
*/
API_EXPORTED struct fp_img *fp_img_binarize(struct fp_img *img)
{
struct fp_img *ret;
int height = img->height;
int width = img->width;
int imgsize = height * width;
if (img->flags & FP_IMG_BINARIZED_FORM) {
fp_err("image already binarized");
return NULL;
}
if (!img->binarized) {
int r = fpi_img_detect_minutiae(img);
if (r < 0)
return NULL;
if (!img->binarized) {
fp_err("no minutiae after successful detection?");
return NULL;
}
}
ret = fpi_img_new(imgsize);
ret->flags |= FP_IMG_BINARIZED_FORM;
ret->width = width;
ret->height = height;
memcpy(ret->data, img->binarized, imgsize);
return ret;
}
static int submit_image(struct fpi_ssm *ssm)
{
struct fp_img_dev *dev = ssm->priv;
vfs301_dev_t *vdev = dev->priv;
int height;
struct fp_img *img;
#if 0
/* XXX: This is probably handled by libfprint automagically? */
if (vdev->scanline_count < 20) {
fpi_ssm_jump_to_state(ssm, M_REQUEST_PRINT);
return 0;
}
#endif
img = fpi_img_new(VFS301_FP_OUTPUT_WIDTH * vdev->scanline_count);
if (img == NULL)
return 0;
vfs301_extract_image(vdev, img->data, &height);
/* TODO: how to detect flip? should the resulting image be
* oriented so that it is equal e.g. to a fingerprint on a paper,
* or to the finger when I look at it?) */
img->flags = FP_IMG_COLORS_INVERTED | FP_IMG_V_FLIPPED;
img->width = VFS301_FP_OUTPUT_WIDTH;
img->height = height;
img = fpi_img_resize(img, img->height * img->width);
fpi_imgdev_image_captured(dev, img);
return 1;
}
void et_assemble_image(struct fpi_img_dev* dev)
{
//size_t sz=(61440/4)*8;
//size_t sz=(61440*8)+6144;
size_t sz=(192*160);
//size_t sz=(61440/2)*8;
//size_t sz=320*384;
struct fp_img* img;
int pos=0;
char* p;
img=fpi_img_new(sz);
//img->flags=FP_IMG_COLORS_INVERTED;
img->flags=FP_IMG_STANDARDIZATION_FLAGS;
for(int i=0;i<8;i++)
{
for(int x=0;x<20;x++)
{
p=et_get_row(et_img_buf[i],x);
for(int y=0;y<768;y+=4,pos++)
{
img->data[pos]=p[y];
}
}
/*if(i)
{
memcpy(&img->data[pos],et_img_buf[i],61440);
pos+=61440;
}
else
{
memcpy(&img->data[pos],et_img_buf[i],6144);
pos+=6144;
}*/
/*for(int x=0;x<61440;x+=4,pos++)
{
img->data[pos]=et_img_buf[i][x];
} */
/*for(int x=0;x<61440;x+=2,pos++)
{
img->data[pos]=et_img_buf[i][x];
}*/
/*for(int x=0;x<61440;x+=2,pos++)
{
if(x && !(x%384))
{
x+=384; //continue;
}
img->data[pos]=et_img_buf[i][x];
}*/
}
fpi_imgdev_image_captured(dev,img);
free_img_buf();
}
struct fp_img *fpi_img_new_for_imgdev(struct fp_img_dev *imgdev)
{
struct fp_img_driver *imgdrv = fpi_driver_to_img_driver(imgdev->dev->drv);
int width = imgdrv->img_width;
int height = imgdrv->img_height;
struct fp_img *img = fpi_img_new(width * height);
img->width = width;
img->height = height;
return img;
}
struct fp_img *fpi_im_resize(struct fp_img *img, unsigned int factor)
{
Image *mimg;
Image *resized;
ExceptionInfo exception;
MagickBooleanType ret;
int new_width = img->width * factor;
int new_height = img->height * factor;
struct fp_img *newimg;
/* It is possible to implement resizing using a simple algorithm, however
* we use ImageMagick because it applies some kind of smoothing to the
* result, which improves matching performances in my experiments. */
if (!IsMagickInstantiated())
InitializeMagick(NULL);
GetExceptionInfo(&exception);
mimg = ConstituteImage(img->width, img->height, "I", CharPixel, img->data,
&exception);
GetExceptionInfo(&exception);
resized = ResizeImage(mimg, new_width, new_height, 0, 1.0, &exception);
newimg = fpi_img_new(new_width * new_height);
newimg->width = new_width;
newimg->height = new_height;
newimg->flags = img->flags;
GetExceptionInfo(&exception);
ret = ExportImagePixels(resized, 0, 0, new_width, new_height, "I",
CharPixel, newimg->data, &exception);
if (ret != MagickTrue) {
fp_err("export failed");
return NULL;
}
DestroyImage(mimg);
DestroyImage(resized);
return newimg;
}
static int submit_image(struct fp_img_dev *dev)
{
struct vfs0050_dev *vfs_dev = dev->priv;
struct fp_img *img = NULL;
int final_height;
char *processed_image;
tmp_writeout_buf(dev);
process_image_data(dev, &processed_image, &final_height); //the fun part
img = fpi_img_new(VFS0050_IMG_WIDTH * final_height);
if (img == NULL)
return 0;
memcpy(img->data, processed_image, final_height * VFS0050_IMG_WIDTH);
free(processed_image);
img->width = VFS0050_IMG_WIDTH;
img->height = final_height;
img->flags = FP_IMG_V_FLIPPED;
fpi_imgdev_image_captured(dev, img);
return 1;
}
struct fp_img *fpi_im_resize(struct fp_img *img, unsigned int w_factor, unsigned int h_factor)
{
int new_width = img->width * w_factor;
int new_height = img->height * h_factor;
pixman_image_t *orig, *resized;
pixman_transform_t transform;
struct fp_img *newimg;
orig = pixman_image_create_bits(PIXMAN_a8, img->width, img->height, (uint32_t *)img->data, img->width);
resized = pixman_image_create_bits(PIXMAN_a8, new_width, new_height, NULL, new_width);
pixman_transform_init_identity(&transform);
pixman_transform_scale(NULL, &transform, pixman_int_to_fixed(w_factor), pixman_int_to_fixed(h_factor));
pixman_image_set_transform(orig, &transform);
pixman_image_set_filter(orig, PIXMAN_FILTER_BILINEAR, NULL, 0);
pixman_image_composite32(PIXMAN_OP_SRC,
orig, /* src */
NULL, /* mask */
resized, /* dst */
0, 0, /* src x y */
0, 0, /* mask x y */
0, 0, /* dst x y */
new_width, new_height /* width height */
);
newimg = fpi_img_new(new_width * new_height);
newimg->width = new_width;
newimg->height = new_height;
newimg->flags = img->flags;
memcpy(newimg->data, pixman_image_get_data(resized), new_width * new_height);
pixman_image_unref(orig);
pixman_image_unref(resized);
return newimg;
}