Open Source Computer Vision Library https://opencv.org/
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
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// If you do not agree to this license, do not download, install,
// copy or use the software.
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// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
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#include "precomp.hpp"
#if !defined HAVE_CUDA || defined(CUDA_DISABLER)
cv::gpu::VIBE_GPU::VIBE_GPU(unsigned long) { throw_nogpu(); }
void cv::gpu::VIBE_GPU::initialize(const GpuMat&, Stream&) { throw_nogpu(); }
void cv::gpu::VIBE_GPU::operator()(const GpuMat&, GpuMat&, Stream&) { throw_nogpu(); }
void cv::gpu::VIBE_GPU::release() {}
#else
namespace cv { namespace gpu { namespace device
{
namespace vibe
{
void loadConstants(int nbSamples, int reqMatches, int radius, int subsamplingFactor);
void init_gpu(PtrStepSzb frame, int cn, PtrStepSzb samples, PtrStepSz<unsigned int> randStates, cudaStream_t stream);
void update_gpu(PtrStepSzb frame, int cn, PtrStepSzb fgmask, PtrStepSzb samples, PtrStepSz<unsigned int> randStates, cudaStream_t stream);
}
}}}
namespace
{
const int defaultNbSamples = 20;
const int defaultReqMatches = 2;
const int defaultRadius = 20;
const int defaultSubsamplingFactor = 16;
}
cv::gpu::VIBE_GPU::VIBE_GPU(unsigned long rngSeed) :
frameSize_(0, 0), rngSeed_(rngSeed)
{
nbSamples = defaultNbSamples;
reqMatches = defaultReqMatches;
radius = defaultRadius;
subsamplingFactor = defaultSubsamplingFactor;
}
void cv::gpu::VIBE_GPU::initialize(const GpuMat& firstFrame, Stream& s)
{
using namespace cv::gpu::device::vibe;
CV_Assert(firstFrame.type() == CV_8UC1 || firstFrame.type() == CV_8UC3 || firstFrame.type() == CV_8UC4);
cudaStream_t stream = StreamAccessor::getStream(s);
loadConstants(nbSamples, reqMatches, radius, subsamplingFactor);
frameSize_ = firstFrame.size();
if (randStates_.size() != frameSize_)
{
cv::RNG rng(rngSeed_);
cv::Mat h_randStates(frameSize_, CV_8UC4);
rng.fill(h_randStates, cv::RNG::UNIFORM, 0, 255);
randStates_.upload(h_randStates);
}
int ch = firstFrame.channels();
int sample_ch = ch == 1 ? 1 : 4;
samples_.create(nbSamples * frameSize_.height, frameSize_.width, CV_8UC(sample_ch));
init_gpu(firstFrame, ch, samples_, randStates_, stream);
}
void cv::gpu::VIBE_GPU::operator()(const GpuMat& frame, GpuMat& fgmask, Stream& s)
{
using namespace cv::gpu::device::vibe;
CV_Assert(frame.depth() == CV_8U);
int ch = frame.channels();
int sample_ch = ch == 1 ? 1 : 4;
if (frame.size() != frameSize_ || sample_ch != samples_.channels())
initialize(frame);
fgmask.create(frameSize_, CV_8UC1);
update_gpu(frame, ch, fgmask, samples_, randStates_, StreamAccessor::getStream(s));
}
void cv::gpu::VIBE_GPU::release()
{
frameSize_ = Size(0, 0);
randStates_.release();
samples_.release();
}
#endif