added perf test for CalcBackProj
Merge branch 'master' of https://github.com/Itseez/opencv into back_proj_fix
FEATURES2D: add DenseFeatureDetector Python wrapper
UMat map-unmap synchronization test
changed type of sanity check
added jpeg progressive support.
Merge pull request #2378 from ngryman:progressive_jpeg
Merge pull request #2478 from clemenscorny:master
improved cv::filter2D
Merge pull request #2528 from mlyashko:back_proj_fix
Merge pull request #2529 from ilya-lavrenov:tapi_filter2D
Merge pull request #2505 from alalek:umat_unmap_synchronization_test
integer cv::resize (INTER_LINEAR && CV_8UC(cn))
removed
added coeffs for OpenCL version
added optimization
added optimization