libXCam is a project for extended camera(not limited in camera) features and focus on image quality improvement and video analysis. There are lots features supported in image pre-processing, image post-processing and smart analysis. This library makes GPU/CPU/ISP working together to improve image quality. OpenCL is used to improve performance in different platforms.
https://github.com/intel/libxcam/blob/e004797601cfdaeaece152d7b3799b87593958eb/modules/soft/soft_stitcher.cpp#L768