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samples/cpp/phase_corr.cpp
46 строк
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StevenPuttemans
update samples: waitKey() usage
15 дек 2016, 15:39
15 дек 2016, 15:39
6d34d6b
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#include "opencv2/core.hpp" #include "opencv2/videoio.hpp" #include "opencv2/highgui.hpp" #include "opencv2/imgproc.hpp" using namespace cv; int main(int, char* []) { VideoCapture video(0); Mat frame, curr, prev, curr64f, prev64f, hann; char key; do { video >> frame; cvtColor(frame, curr, COLOR_RGB2GRAY); if(prev.empty()) { prev = curr.clone(); createHanningWindow(hann, curr.size(), CV_64F); } prev.convertTo(prev64f, CV_64F); curr.convertTo(curr64f, CV_64F); Point2d shift = phaseCorrelate(prev64f, curr64f, hann); double radius = std::sqrt(shift.x*shift.x + shift.y*shift.y); if(radius > 5) { // draw a circle and line indicating the shift direction... Point center(curr.cols >> 1, curr.rows >> 1); circle(frame, center, (int)radius, Scalar(0, 255, 0), 3, LINE_AA); line(frame, center, Point(center.x + (int)shift.x, center.y + (int)shift.y), Scalar(0, 255, 0), 3, LINE_AA); } imshow("phase shift", frame); key = (char)waitKey(2); prev = curr.clone(); } while(key != 27); // Esc to exit... return 0; }