CODEWITHSUNDEEP
opencv
user3590669
user3590669

Reputation: 61

How to convert an rgb image to ycrcb colour space in opencv python

using open cv python i am trying to convert an rgb image to ycbcr using cv2.cvtclor.

the error is name 'CV_BGR2YCrCb' is not defined

Can anyone suggest few ideas.

Upvotes: 6

Views: 27109

Answers (3)

user1106334
user1106334

Reputation:

OpenCV reads image as BGR so if you need RGB image then you have to convert image into its RGB form then you can perform your tasks You can use these as below 

YCrCb = cv2.cvtColor(img, cv2.COLOR_BGR2YCR_CB) (# if input image is BGR)  
YCrCb = cv2.cvtColor(img, cv2.COLOR_RGB2YCrCb) (# if input image is RGB)

Upvotes: 1

Khawar Ali
Khawar Ali

Reputation: 3506

You need to do this:

imgYCC = cv2.cvtColor(img, cv2.COLOR_BGR2YCR_CB)

The attribute name is COLOR_BGR2YCR_CB not CV_BGR2YCrCb

Upvotes: 15

Aurelius
Aurelius

Reputation: 11359

OpenCV's Python bindings don't use the same flag values as the C++ constants (See this other answer for a little more detail. The correct flag value to pass is cv2.COLOR_BGR2YCR_CB. You would call cvtColor like this:

im = cv2.cvtColor(bgr, cv2.COLOR_BGR2YCR_CB)

Upvotes: 5

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