Itseez/opencv — pull request #2023 by krodyush (2013-12-19 19:07:53+00:00)
Title: Improve ocl cvt_color performance for the following conversions: RGB<->B...

...GR, RGB->Gray, RGB<->XYZ, RGB<->YCrCb, RGB<->YUV, and mRGBA<->RGBA.

The improvement was done basically by processing more than 1 pixel by each work-item and using vector's operations.
new performance tests were added