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Alex Rivera
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I have a jpeg. Its color profile is sRGB , of course. I load it into "image" and call cvCvtColor(image, gray, CV_BGR2GRAY); to convert it to grayscale. When I step into that routine in the debugger, I find it multiplying pixels by these values: #define cscGr_32f 0.299f #define cscGg_32f 0.587f #define cscGb_32f 0.114f Waaaait a minute. Those are the luminance values for NTSC RGB , not sRGB. Furthermore, I cannot see that it's doing anything about gamma correction . I am confused. When OpenCV decodes the image, does it remove gamma correction and convert to NTSC RGB? Bonus question: Is there an OpenCV forum where the gurus hang? I've googled in vain.
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