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00036 #include <QVApplication>
00037 #include <QVMPlayerCamera>
00038 #include <QVGUI>
00039 #include <QVImageCanvas>
00040 #include <QVFilterSelectorWorker>
00041
00042 #ifndef DOXYGEN_IGNORE_THIS
00043
00044 class HarrisExtractorWorker: public QVWorker
00045 {
00046 public:
00047 HarrisExtractorWorker(QString name): QVWorker(name)
00048 {
00049 addProperty< int >("Points", inputFlag, 15, "window size ", 1, 100);
00050 addProperty< double >("Threshold", inputFlag, 1.0, "window size ", 0.0, 256.0);
00051 addProperty< QVImage<uChar,3> >("Input image", inputFlag|outputFlag);
00052 addProperty< QList<QPointF> >("Corners", outputFlag);
00053 }
00054
00055 void iterate()
00056 {
00057
00058 QVImage<uChar> image = getPropertyValue< QVImage<uChar,3> >("Input image");
00059 const double threshold = getPropertyValue<double>("Threshold");
00060 const int pointNumber = getPropertyValue<int>("Points");
00061 timeFlag("grab Frame");
00062
00063
00064 QVImage<sFloat> cornerResponseImage(image.getRows(), image.getCols());
00065 FilterHessianCornerResponseImage(image, cornerResponseImage);
00066 timeFlag("Corner response image");
00067
00068
00069 QList<QPointF> hotPoints = GetMaximalResponsePoints3(cornerResponseImage, threshold);
00070 timeFlag("Local maximal filter");
00071
00072
00073 setPropertyValue< QList<QPointF> >("Corners", hotPoints.mid(MAX(0,hotPoints.size() - pointNumber)));
00074 }
00075 };
00076
00077 int main(int argc, char *argv[])
00078 {
00079 QVApplication app(argc, argv,
00080 "Example program for QVision library. Obtains several features from input video frames."
00081 );
00082
00083 QVFilterSelectorWorker<uChar, 3> filterWorker("Filter worker");
00084 HarrisExtractorWorker cornersWorker("Corners Worker");
00085
00086 QVMPlayerCamera camera("Video");
00087 camera.link(&filterWorker, "Input image");
00088
00089 filterWorker.linkProperty("Output image", &cornersWorker, "Input image", QVWorker::SynchronousLink);
00090
00091 QVGUI interface;
00092
00093 QVImageCanvas filteredCanvas("Input");
00094 filteredCanvas.linkProperty(filterWorker, "Output image");
00095
00096 QVImageCanvas cornersCanvas("Corners");
00097 cornersCanvas.linkProperty(cornersWorker, "Input image");
00098 cornersCanvas.linkProperty(cornersWorker,"Corners", Qt::blue, false);
00099
00100 return app.exec();
00101 }
00102
00103 #endif