RGB2Lab_f        5145 modules/imgproc/src/color.cpp     RGB2Lab_f(int _srccn, int blueIdx, const float* _coeffs,
RGB2Lab_f        8275 modules/imgproc/src/color.cpp                     CvtColorLoop(src, dst, RGB2Lab_f(scn, bidx, 0, 0, srgb));