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LKDemo (calcOpticalFlowPyrLK (SparsePyrLKOpticalFlowImpl::calc (ocl…

- - - - sparse
        
        build the image pyramids.
        
        allocate buffers with aligned pitch to be able to use image on buffer extension
        
        dI/dx ~ Ix, dI/dy ~ Iy
        
        lkSparse_run
        
        ocl::lkSparse
        
        cv::ocl::video::pyrlk_oclsrc
        
        This is the required pitch alignment in pixels.
        
        allocate buffers with aligned pitch to be able to use cl_khr_image2d_from_buffer extension.
        
        ocl::Device::getDefault()
        
        imagePitchAlignment
        
        pyrDown
        
        ocl_pyrDown
        
        ocl::pyrDown
        
        ocl::imgproc::pyr_down_oclsrc
        
        file : lkpyramid.cpp
        line : 862
      - file : lkpyramid.cpp
        line : 1001
        sparse line : 1054
- - - - ocl_cornerMinEigenValVecs
        
        ocl::corner
        
        ocl::imgproc::corner_oclsrc
        
        extractCovData
        
        ocl::sobel%d
        
        ocl::imgproc::covardata_oclsrc
        
        " 3 "、5、7
    - - collect list of pointers to features - put them into temporary image
    - - ocl::imgproc::gftt_oclsrc
    - - find threshold
- - - - Retrieves a pixel rectangle from an image with sub-pixel accuracy.