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11 // For Open Source Computer Vision Library
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41 //M*/
42
43 #include "precomp.hpp"
44
45 using namespace cv;
46 using namespace cv::cuda;
47
48 #if !defined HAVE_CUDA || !defined(HAVE_OPENCV_CUDAARITHM) || defined(CUDA_DISABLER)
49
operator ()(const GpuMat &,const GpuMat &,GpuMat &,GpuMat &,int,int,Stream &)50 void cv::cuda::FastOpticalFlowBM::operator ()(const GpuMat&, const GpuMat&, GpuMat&, GpuMat&, int, int, Stream&) { throw_no_cuda(); }
51
52 #else // HAVE_CUDA
53
54 namespace optflowbm_fast
55 {
56 void get_buffer_size(int src_cols, int src_rows, int search_window, int block_window, int& buffer_cols, int& buffer_rows);
57
58 template <typename T>
59 void calc(PtrStepSzb I0, PtrStepSzb I1, PtrStepSzf velx, PtrStepSzf vely, PtrStepi buffer, int search_window, int block_window, cudaStream_t stream);
60 }
61
operator ()(const GpuMat & I0,const GpuMat & I1,GpuMat & flowx,GpuMat & flowy,int search_window,int block_window,Stream & stream)62 void cv::cuda::FastOpticalFlowBM::operator ()(const GpuMat& I0, const GpuMat& I1, GpuMat& flowx, GpuMat& flowy, int search_window, int block_window, Stream& stream)
63 {
64 CV_Assert( I0.type() == CV_8UC1 );
65 CV_Assert( I1.size() == I0.size() && I1.type() == I0.type() );
66
67 int border_size = search_window / 2 + block_window / 2;
68 Size esize = I0.size() + Size(border_size, border_size) * 2;
69
70 ensureSizeIsEnough(esize, I0.type(), extended_I0);
71 ensureSizeIsEnough(esize, I0.type(), extended_I1);
72
73 cuda::copyMakeBorder(I0, extended_I0, border_size, border_size, border_size, border_size, cv::BORDER_DEFAULT, Scalar(), stream);
74 cuda::copyMakeBorder(I1, extended_I1, border_size, border_size, border_size, border_size, cv::BORDER_DEFAULT, Scalar(), stream);
75
76 GpuMat I0_hdr = extended_I0(Rect(Point2i(border_size, border_size), I0.size()));
77 GpuMat I1_hdr = extended_I1(Rect(Point2i(border_size, border_size), I0.size()));
78
79 int bcols, brows;
80 optflowbm_fast::get_buffer_size(I0.cols, I0.rows, search_window, block_window, bcols, brows);
81
82 ensureSizeIsEnough(brows, bcols, CV_32SC1, buffer);
83
84 flowx.create(I0.size(), CV_32FC1);
85 flowy.create(I0.size(), CV_32FC1);
86
87 optflowbm_fast::calc<uchar>(I0_hdr, I1_hdr, flowx, flowy, buffer, search_window, block_window, StreamAccessor::getStream(stream));
88 }
89
90 #endif // HAVE_CUDA
91