- added video file i/o Windows RT and sample application using camera, enabled parallelization with TBB or MS Concurrency
- added CUDA 5.5 support for desktop and ARM systems
- added Qt 5 support
- added many new OpenCL algorithms ports, included OpenCL binaries into the Windows superpack
- iOS build scripts (together with Android ones) moved to ‘opencv/platforms’ directory
- added functions for UIImage <-> cv::Mat conversion->
- correct front/back camera selection in Android app framework
- added Linaro NDK support and fixes for MIPS to Android CMake toolchain
- stability has been improved by a lot, numerous bug-fixes across all the library
See the full ChangeLog for more information.
Source: opencv.org