Crop Image of Bounding Boxes formed in Videos through Webcam

[Pulkitg64]

I un-comment following lines:
static int copied_frame_id = -1;
static image copy_img;
if (copied_frame_id != frame_id) {
copied_frame_id = frame_id;
if (copy_img.data) free_image(copy_img);
copy_img = copy_image(im);
}
image cropped_im = crop_image(copy_img, left, top, right - left, bot - top);
static int img_id = 0;
img_id++;
char image_name[1024];
int best_class_id = selected_detections[i].best_class;
sprintf(image_name, "result_img/img_%d_%d_%d_%s.jpg", frame_id, img_id, best_class_id, names[best_class_id]);
save_image(cropped_im, image_name);
free_image(cropped_im);

I also added following lines
image c1 = crop_image(im, left, top, right-left, bot-top);
save_image(c1, "99");

But I am getting no image in result_img folder for my videos but getting images when I am testing on single images. Please help me

[xinyee1997]

I want to know the solution too

[rg321]

Hi, can you try following code
in file src/image_opencv.cpp, show_img is Mat pointer.
Just crop desired portion out of Mat.

// you should create directory: result_img static int copied_frame_id = -1; // static IplImage* copy_img = NULL; if (copied_frame_id != frame_id) { copied_frame_id = frame_id; // if(copy_img == NULL) copy_img = cvCreateImage(cvSize(show_img->width, show_img->height), show_img->depth, show_img->nChannels); // cvCopy(show_img, copy_img, 0); } static int img_id = 0; img_id++; char image_name[1024]; sprintf(image_name, "result_img/img_%d_%d_%d_%s.jpg", frame_id, img_id, class_id, names[class_id]); CvRect rect = cvRect(pt1.x, pt1.y, pt2.x - pt1.x, pt2.y - pt1.y); cv::Mat copy_image = (*show_img)(rect); cv::imwrite(image_name, copy_image); // cvSetImageROI(copy_img, rect); // cvSaveImage(image_name, copy_img, 0); // cvResetImageROI(copy_img);

pull request created for the same
#8197