blobFromImage and crop #14659
Description
in blobFromImage it is possible to resize and crop image. blob generated can be used as input for yolo net. Values return by yolo are in a new coordinates system that must be computed using this code :
if crop:
s = max([blob_width / img.shape[1], blob_height / img.shape[0]])
r_blob = (int(0.5 / s * (int(img.shape[1] * s) - blob_width )),
int(0.5 / s * (int(img.shape[0] * s) - blob_height )),
int(blob_width / s),
int(blob_height / s))
else:
r_blob = (0, 0, img.shape[1], img.shape[0])
for yolov3 or yolov2 result.
new function would be Rect getBlobFromimagerect(Mat , Size , bool crop)
Is it a good pr?