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new optimized version of BackgroundSubtractorGMG

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This commit is contained in:
Vladislav Vinogradov
2012-08-08 18:15:06 +04:00
parent 1995b1a06c
commit 42c1d4f4b1
4 changed files with 337 additions and 593 deletions
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117
samples/cpp/bgfg_gmg.cpp
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@@ -7,91 +7,76 @@
#include <opencv2/opencv.hpp>
#include <iostream>
#include <sstream>
using namespace cv;
static void help()
{
std::cout <<
"\nA program demonstrating the use and capabilities of a particular BackgroundSubtraction\n"
"algorithm described in A. Godbehere, A. Matsukawa, K. Goldberg, \n"
"\"Visual Tracking of Human Visitors under Variable-Lighting Conditions for a Responsive\n"
"Audio Art Installation\", American Control Conference, 2012, used in an interactive\n"
"installation at the Contemporary Jewish Museum in San Francisco, CA from March 31 through\n"
"July 31, 2011.\n"
"Call:\n"
"./BackgroundSubtractorGMG_sample\n"
"Using OpenCV version " << CV_VERSION << "\n"<<std::endl;
std::cout <<
"\nA program demonstrating the use and capabilities of a particular BackgroundSubtraction\n"
"algorithm described in A. Godbehere, A. Matsukawa, K. Goldberg, \n"
"\"Visual Tracking of Human Visitors under Variable-Lighting Conditions for a Responsive\n"
"Audio Art Installation\", American Control Conference, 2012, used in an interactive\n"
"installation at the Contemporary Jewish Museum in San Francisco, CA from March 31 through\n"
"July 31, 2011.\n"
"Call:\n"
"./BackgroundSubtractorGMG_sample\n"
"Using OpenCV version " << CV_VERSION << "\n"<<std::endl;
}
int main(int argc, char** argv)
{
help();
setUseOptimized(true);
setNumThreads(8);
help();
Ptr<BackgroundSubtractorGMG> fgbg = Algorithm::create<BackgroundSubtractorGMG>("BackgroundSubtractor.GMG");
if (fgbg == NULL)
{
CV_Error(CV_StsError,"Failed to create Algorithm\n");
}
fgbg->set("smoothingRadius",7);
fgbg->set("decisionThreshold",0.7);
initModule_video();
setUseOptimized(true);
setNumThreads(8);
VideoCapture cap;
if( argc > 1 )
Ptr<BackgroundSubtractorGMG> fgbg = Algorithm::create<BackgroundSubtractorGMG>("BackgroundSubtractor.GMG");
if (fgbg.empty())
{
std::cerr << "Failed to create BackgroundSubtractor.GMG Algorithm." << std::endl;
return -1;
}
fgbg->set("initializationFrames", 20);
fgbg->set("decisionThreshold", 0.7);
VideoCapture cap;
if (argc > 1)
cap.open(argv[1]);
else
cap.open(0);
if (!cap.isOpened())
{
std::cout << "error: cannot read video. Try moving video file to sample directory.\n";
return -1;
}
Mat img, downimg, downimg2, fgmask, upfgmask, posterior, upposterior;
if (!cap.isOpened())
{
std::cerr << "Cannot read video. Try moving video file to sample directory." << std::endl;
return -1;
}
bool first = true;
namedWindow("posterior");
namedWindow("fgmask");
namedWindow("FG Segmentation");
int i = 0;
for (;;)
{
std::stringstream txt;
txt << "frame: ";
txt << i++;
Mat frame, fgmask, segm;
cap >> img;
putText(img,txt.str(),Point(20,40),FONT_HERSHEY_SIMPLEX,0.8,Scalar(1.0,0.0,0.0));
namedWindow("FG Segmentation", WINDOW_NORMAL);
resize(img,downimg,Size(160,120),0,0,INTER_NEAREST); // Size(cols, rows) or Size(width,height)
if (first)
{
fgbg->initializeType(downimg,0,255);
first = false;
}
if (img.empty())
{
return 0;
}
(*fgbg)(downimg,fgmask);
fgbg->updateBackgroundModel(Mat::zeros(120,160,CV_8U));
fgbg->getPosteriorImage(posterior);
resize(fgmask,upfgmask,Size(640,480),0,0,INTER_NEAREST);
Mat coloredFG = Mat::zeros(480,640,CV_8UC3);
coloredFG.setTo(Scalar(100,100,0),upfgmask);
for (;;)
{
cap >> frame;
if (frame.empty())
break;
(*fgbg)(frame, fgmask);
frame.copyTo(segm);
add(frame, Scalar(100, 100, 0), segm, fgmask);
imshow("FG Segmentation", segm);
resize(posterior,upposterior,Size(640,480),0,0,INTER_NEAREST);
imshow("posterior",upposterior);
imshow("fgmask",upfgmask);
resize(img, downimg2, Size(640, 480),0,0,INTER_LINEAR);
imshow("FG Segmentation",downimg2 + coloredFG);
int c = waitKey(30);
if( c == 'q' || c == 'Q' || (c & 255) == 27 )
break;
}
if (c == 'q' || c == 'Q' || (c & 255) == 27)
break;
}
return 0;
}