CODEWITHSUNDEEP
pythonopencvimage-processingcolorsimage-manipulation
Da Nio
Da Nio

Reputation: 302

Grayscale to RGB - Python

I can't get a grayscale image in RGB, here's my code:

img=cv2.imread("clahe_2.jpg")
backtorgb = cv2.cvtColor(img,cv2.COLOR_GRAY2RGB)
showImg(backtorgb,"claheCLR")

This error returns:

backtorgb = cv2.cvtColor(img,cv2.COLOR_GRAY2RGB)
cv2.error: /build/opencv-L2vuMj/opencv-3.2.0+dfsg/modules/imgproc/src/color.cpp:9765: error: (-215) scn == 1 && (dcn == 3 || dcn == 4) in function cvtColor

Filepath is correct. Any suggest?

Upvotes: 1

Views: 3701

Answers (3)

Da Nio
Da Nio

Reputation: 302

The problem was on the application of the CLAHE filter and its grayscale output, actually the output kept the 3 channels but at the sight it looked like a grayscale, documentation here.

I simply found here a method that kept the RGB form to solve the problem, thanks to everyone for the answers.

Upvotes: 0

gilad
gilad

Reputation: 436

By default, imread opens the image as a 3-channel BGR image so you don't need to convert it, maybe just to RGB if that's what you're looking for.

Check out the documentation here

Upvotes: 0

Grzegorz Bokota
Grzegorz Bokota

Reputation: 1804

I think tat problem is that your image is not real grayscale. It is RGB, but visible as grayscale. So need to bring one channel from image and then run the code:

backtorgb = cv2.cvtColor(img[..., 0], cv2.COLOR_GRAY2RGB)

Upvotes: 1

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