Fastest way to apply color matrix to RGB image using OpenCV 3.0? -

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i have color image represented opencv mat object (c++, image type cv_32fc3). have color correction matrix want apply each pixel of rgb color image (or bgr using opencv convention, doesn't matter here). color correction matrix 3x3.

i iterate on pixels , create vector v (3x1) representing rgb, , compute m*v, slow real-time video application.

the cv::cvtcolor function fast, not seem allow custom color transformations. http://docs.opencv.org/2.4/modules/imgproc/doc/miscellaneous_transformations.html#cvtcolor

similar following, using opencv c++, not python. apply transformation matrix pixels in opencv image

basically linked answer uses reshape convert cv_32fc3 mat of size m x n cv_32f mat of size (mn) x 3. after that, each row of matrix contains color channels of 1 pixel. can apply usual matrix multiplication obtain new mat , reshape original shape 3 channels.

note: may worth noticing default color space of opencv bgr, not rgb.


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