Unroll pyrUp kernel
Removed useless multiplication by 4
some optimizaions of cv::pow
optimized cv::calcHist
eliminated convertTo
optimized histogram merging
cv::equalizeHist
optimized cv::boxFilter
Removed storing of zeros in local memory
Add peromance tests for OCL integral sum of square
Change threshold
Fix error
Increase epsilon for pass sanity check
Merge pull request #2840 from ilya-lavrenov:tapi_calchist
Merge pull request #2847 from ilya-lavrenov:tapi_pow
Merge pull request #2864 from ilya-lavrenov:tapi_boxfilter
Merge pull request #2878 from vbystricky:ocl_integral_sqsum_perf_test
Merge pull request #2790 from akarsakov:ocl_pyrUp_unroll
Merge branch 'master' of https://github.com/Itseez/opencv.git