对一个通道图像使用不同的颜色图 - cv2.imshow()

Question

When I use this method with an 1 channel image, it's shown in grayscale. Is there a way to use other color maps (not grayscale) when showing an 1 channel image? If there is, it means grayscale is the default for imshow when working with an image with only 1 channel? Thanks in advance

Answer 1

As far as I know, you cannot apply a color map in Python/OpenCV cv2.imshow like you can with Mathplotlib pyplot. But you can create a color map and apply it to your grayscale image using cv2.LUT to change your grayscale image into a colored image that you can display with cv2.imshow.

Please see the documentation for cv2.imshow at https://docs.opencv.org/4.1.1/d7/dfc/group__highgui.html#ga453d42fe4cb60e5723281a89973ee563