OpenCV has rewritten several of its algorithms for GPU's. http://www.opencv.org.cn/opencvdoc/2.3.2/html/modules/gpu/doc/introduction.html http://www.opencv.org.

OpenCV has rewritten several of its algorithms for GPU's. http://www.opencv.org.cn/opencvdoc/2.3.2/html/modules/gpu/doc/introduction.html http://www.opencv.org.cn/opencvdoc/2.3.2/html/modules/gpu/do... In general, the GPU versions are faster but you need to be cognizant of data transfer times between memory and the GPU. Relative speed also depends on which CPU and GPU's you have access to and the quality of the GPU vs CPU algorithm implementations. For example, my 2012 Macbook CPU is faster than my 2011 Macbook GPU for certain OpenCV algorithms.