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96 lines
2.6 KiB
C++
96 lines
2.6 KiB
C++
/* OpenCV Application Tracing support demo. */
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#include <iostream>
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#include <opencv2/core.hpp>
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#include <opencv2/imgproc.hpp>
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#include <opencv2/highgui.hpp>
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#include <opencv2/videoio.hpp>
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#include <opencv2/core/utils/trace.hpp>
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using namespace cv;
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using namespace std;
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static void process_frame(const cv::UMat& frame)
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{
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CV_TRACE_FUNCTION(); // OpenCV Trace macro for function
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imshow("Live", frame);
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UMat gray, processed;
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cv::cvtColor(frame, gray, COLOR_BGR2GRAY);
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Canny(gray, processed, 32, 64, 3);
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imshow("Processed", processed);
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}
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int main(int argc, char** argv)
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{
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CV_TRACE_FUNCTION();
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cv::CommandLineParser parser(argc, argv,
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"{help h ? | | help message}"
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"{n | 100 | number of frames to process }"
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"{@video | 0 | video filename or cameraID }"
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);
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if (parser.has("help"))
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{
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parser.printMessage();
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return 0;
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}
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VideoCapture capture;
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std::string video = parser.get<string>("@video");
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if (video.size() == 1 && isdigit(video[0]))
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capture.open(parser.get<int>("@video"));
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else
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capture.open(samples::findFileOrKeep(video)); // keep GStreamer pipelines
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int nframes = 0;
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if (capture.isOpened())
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{
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nframes = (int)capture.get(CAP_PROP_FRAME_COUNT);
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cout << "Video " << video <<
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": width=" << capture.get(CAP_PROP_FRAME_WIDTH) <<
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", height=" << capture.get(CAP_PROP_FRAME_HEIGHT) <<
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", nframes=" << nframes << endl;
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}
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else
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{
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cout << "Could not initialize video capturing...\n";
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return -1;
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}
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int N = parser.get<int>("n");
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if (nframes > 0 && N > nframes)
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N = nframes;
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cout << "Start processing..." << endl
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<< "Press ESC key to terminate" << endl;
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UMat frame;
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for (int i = 0; N > 0 ? (i < N) : true; i++)
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{
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CV_TRACE_REGION("FRAME"); // OpenCV Trace macro for named "scope" region
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{
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CV_TRACE_REGION("read");
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capture.read(frame);
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if (frame.empty())
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{
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cerr << "Can't capture frame: " << i << std::endl;
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break;
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}
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// OpenCV Trace macro for NEXT named region in the same C++ scope
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// Previous "read" region will be marked complete on this line.
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// Use this to eliminate unnecessary curly braces.
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CV_TRACE_REGION_NEXT("process");
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process_frame(frame);
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CV_TRACE_REGION_NEXT("delay");
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if (waitKey(1) == 27/*ESC*/)
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break;
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}
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}
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return 0;
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}
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