OpenCV TypeError: Expected cv::UMat for argument 'src' - What is this?

Question

Disclaimer: huge openCV noob

Traceback (most recent call last):

File \"lanes2.py\", line 22, in

canny = canny(lane_image)         


        

Answer 1

Not your code is the problem this is perfectly fine:

gray = cv2.cvtColor(imgUMat, cv2.COLOR_RGB2GRAY)

The problem is that imgUMat is None so you probably made a mistake when loading your image:

imgUMat = cv2.imread("your_image.jpg")

I suspect you just entered the wrong image path.