So it turns out that the problem comes from one line in modules\imgproc\src\imgwarp.cpp: CV_Assert( ssize.area() > 0 ); When the product of rows and columns of the image to be resized is larger than 2^31, ssize.area() results in a negative number. This appears to be a bug in OpenCV and hopefully will be fixed in … Read more
You seem to be following this tutorial page (based on the code you’ve shown in this and your two related questions 1, 2). The function documentation is here (although I note it is still labelled “beta”) and implies that outImg is optional. However, the python error message is explicit – an argument is required in … Read more
I’ve solved my own problem. Line iterator seems to be unavailable in the cv2 library. Therefore, I made my own line iterator. No loops are used, so it should be pretty fast. Here is the code if anybody needs it: def createLineIterator(P1, P2, img): “”” Produces and array that consists of the coordinates and intensities … Read more
This error message error: (-215)size.width>0 && size.height>0 in function imshow simply means that imshow() is not getting video frame from input-device. You can try using cap = cv2.VideoCapture(1) instead of cap = cv2.VideoCapture(0) & see if the problem still persists.
Your problem is in the fact that skimage.io.imread loads image as RGB (or RGBA), but OpenCV assumes the image to be BGR or BGRA (BGR is the default OpenCV colour format). This means that blue and red planes get flipped. 3 Channel Images Let’s try this out with the following simple test image: First let’s … Read more