illuminationChange  143 modules/photo/src/seamless_cloning.cpp void cv::illuminationChange(InputArray _src, InputArray _mask, OutputArray _dst, float a, float b)
illuminationChange  421 modules/photo/src/seamless_cloning_impl.cpp void Cloning::illuminationChange(Mat &I, Mat &mask, Mat &wmask, Mat &cloned, float alpha, float beta)