Python和OpenCV：将16位图像转换为灰度图像

Question

I have a 16 bit image and I would like to convert it into gray.

With 8 bit images it works fine with:

img = cv2.imread('test.png')
gray = cv2.cvtColor(gray, cv2.COLOR_BGR2GRAY)

People here in stackoverflow write that OpenCV doesn't work that good with more than 8 bit images ?

Does anyone know a possibility to convert my 16 bit .png image to gray?

Answer 1

It works with img.astype(np.uint16)
and to check the documentation first is a very good hint!