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Merge pull request #13625 from nglee:dev_CudaFarnebackInitFlowFix

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This commit is contained in:
Alexander Alekhin 2019-01-16 18:18:57 +00:00
commit 49de982ee7
3 changed files with 49 additions and 14 deletions
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29
modules/cudaoptflow/src/farneback.cpp
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@ -165,10 +165,29 @@ namespace
{
const GpuMat frame0 = _frame0.getGpuMat();
const GpuMat frame1 = _frame1.getGpuMat();
GpuMat flow = _flow.getGpuMat();
BufferPool pool(stream);
GpuMat flowx = pool.getBuffer(frame0.size(), CV_32FC1);
GpuMat flowy = pool.getBuffer(frame0.size(), CV_32FC1);
CV_Assert(frame0.channels() == 1 && frame1.channels() == 1);
CV_Assert(frame0.size() == frame1.size());
GpuMat flowx, flowy;
// If flag is set, check for integrity; if not set, allocate memory space
if (flags_ & OPTFLOW_USE_INITIAL_FLOW)
{
CV_Assert(flow.size() == frame0.size() && flow.channels() == 2 &&
flow.depth() == CV_32F);
std::vector<cuda::GpuMat> _flows(2);
cuda::split(flow, _flows, stream);
flowx = _flows[0];
flowy = _flows[1];
}
else
{
flowx.create(frame0.size(), CV_32FC1);
flowy.create(frame0.size(), CV_32FC1);
}
calcImpl(frame0, frame1, flowx, flowy, stream);
@ -291,8 +310,6 @@ namespace
void FarnebackOpticalFlowImpl::calcImpl(const GpuMat &frame0, const GpuMat &frame1, GpuMat &flowx, GpuMat &flowy, Stream &stream)
{
CV_Assert(frame0.channels() == 1 && frame1.channels() == 1);
CV_Assert(frame0.size() == frame1.size());
CV_Assert(polyN_ == 5 || polyN_ == 7);
CV_Assert(!fastPyramids_ || std::abs(pyrScale_ - 0.5) < 1e-6);
@ -303,8 +320,6 @@ namespace
Size size = frame0.size();
GpuMat prevFlowX, prevFlowY, curFlowX, curFlowY;
flowx.create(size, CV_32F);
flowy.create(size, CV_32F);
GpuMat flowx0 = flowx;
GpuMat flowy0 = flowy;

10
modules/cudaoptflow/test/test_optflow.cpp
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@ -337,7 +337,15 @@ CUDA_TEST_P(FarnebackOpticalFlow, Accuracy)
frame0, frame1, flow, farn->getPyrScale(), farn->getNumLevels(), farn->getWinSize(),
farn->getNumIters(), farn->getPolyN(), farn->getPolySigma(), farn->getFlags());
EXPECT_MAT_SIMILAR(flow, d_flow, 0.1);
// Relax test limit when the flag is set
if (farn->getFlags() & cv::OPTFLOW_FARNEBACK_GAUSSIAN)
{
EXPECT_MAT_SIMILAR(flow, d_flow, 2e-2);
}
else
{
EXPECT_MAT_SIMILAR(flow, d_flow, 1e-4);
}
}
INSTANTIATE_TEST_CASE_P(CUDA_OptFlow, FarnebackOpticalFlow, testing::Combine(

22
modules/video/src/optflowgf.cpp
View File

@ -646,8 +646,6 @@ private:
Size size = frame0.size();
UMat prevFlowX, prevFlowY, curFlowX, curFlowY;
flowx.create(size, CV_32F);
flowy.create(size, CV_32F);
UMat flowx0 = flowx;
UMat flowy0 = flowy;
@ -1075,12 +1073,19 @@ private:
return false;
std::vector<UMat> flowar;
if (!_flow0.empty())
// If flag is set, check for integrity; if not set, allocate memory space
if (flags_ & OPTFLOW_USE_INITIAL_FLOW)
{
if (_flow0.empty() || _flow0.size() != _prev0.size() || _flow0.channels() != 2 ||
_flow0.depth() != CV_32F)
return false;
split(_flow0, flowar);
}
else
{
flowar.push_back(UMat());
flowar.push_back(UMat());
flowar.push_back(UMat(_prev0.size(), CV_32FC1));
flowar.push_back(UMat(_prev0.size(), CV_32FC1));
}
if(!this->operator()(_prev0.getUMat(), _next0.getUMat(), flowar[0], flowar[1])){
return false;
@ -1112,7 +1117,14 @@ void FarnebackOpticalFlowImpl::calc(InputArray _prev0, InputArray _next0,
CV_Assert( prev0.size() == next0.size() && prev0.channels() == next0.channels() &&
prev0.channels() == 1 && pyrScale_ < 1 );
// If flag is set, check for integrity; if not set, allocate memory space
if( flags_ & OPTFLOW_USE_INITIAL_FLOW )
CV_Assert( _flow0.size() == prev0.size() && _flow0.channels() == 2 &&
_flow0.depth() == CV_32F );
else
_flow0.create( prev0.size(), CV_32FC2 );
Mat flow0 = _flow0.getMat();
for( k = 0, scale = 1; k < levels; k++ )