OpenCV 3.0 Gold which was released early last month, is the most functional and the fastest OpenCV ever. This release comes with over 1500 patches, opencv_contrib repository has been added. A lot of new functionality have been included in the release. OpenCV 3.0 Gold changelog opencv_contrib (http://github.com/itseez/opencv_contrib) repository has been added. A lot of new functionality is there already! opencv_contrib is only compatible with 3.0/master, not 2.4. a subset of Intel IPP (IPPCV) is given to us and our users free of charge, free of licensing fees, for commercial and non-commerical use.