I'm currently using Exposure Fusion, specifically MergeMertens :
http://docs.opencv.org/trunk/modules/photo/doc/hdr_imaging.html
However it's quite computationally expensive. I would like to utilize my Intel-based GPU to hopefully speed up computation. I assume this means I need to use OpenCL.
I've never used OpenCV in conjunction with a GPU before. Can I use all existing algorithms with GPU Mats? Or can I only use GPU-specific algorithms? Or in other words, can I still use the Exposure Fusion methods with GPU Mats?