mirror of
https://github.com/opencv/opencv.git
synced 2024-12-25 10:08:03 +08:00
96 lines
2.6 KiB
C++
96 lines
2.6 KiB
C++
/* OpenCV Application Tracing support demo. */
|
|
#include <iostream>
|
|
|
|
#include <opencv2/core.hpp>
|
|
#include <opencv2/imgproc.hpp>
|
|
#include <opencv2/highgui.hpp>
|
|
#include <opencv2/videoio.hpp>
|
|
#include <opencv2/core/utils/trace.hpp>
|
|
|
|
using namespace cv;
|
|
using namespace std;
|
|
|
|
static void process_frame(const cv::UMat& frame)
|
|
{
|
|
CV_TRACE_FUNCTION(); // OpenCV Trace macro for function
|
|
|
|
imshow("Live", frame);
|
|
|
|
UMat gray, processed;
|
|
cv::cvtColor(frame, gray, COLOR_BGR2GRAY);
|
|
Canny(gray, processed, 32, 64, 3);
|
|
imshow("Processed", processed);
|
|
}
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
CV_TRACE_FUNCTION();
|
|
|
|
cv::CommandLineParser parser(argc, argv,
|
|
"{help h ? | | help message}"
|
|
"{n | 100 | number of frames to process }"
|
|
"{@video | 0 | video filename or cameraID }"
|
|
);
|
|
if (parser.has("help"))
|
|
{
|
|
parser.printMessage();
|
|
return 0;
|
|
}
|
|
|
|
VideoCapture capture;
|
|
std::string video = parser.get<string>("@video");
|
|
if (video.size() == 1 && isdigit(video[0]))
|
|
capture.open(parser.get<int>("@video"));
|
|
else
|
|
capture.open(samples::findFileOrKeep(video)); // keep GStreamer pipelines
|
|
int nframes = 0;
|
|
if (capture.isOpened())
|
|
{
|
|
nframes = (int)capture.get(CAP_PROP_FRAME_COUNT);
|
|
cout << "Video " << video <<
|
|
": width=" << capture.get(CAP_PROP_FRAME_WIDTH) <<
|
|
", height=" << capture.get(CAP_PROP_FRAME_HEIGHT) <<
|
|
", nframes=" << nframes << endl;
|
|
}
|
|
else
|
|
{
|
|
cout << "Could not initialize video capturing...\n";
|
|
return -1;
|
|
}
|
|
|
|
int N = parser.get<int>("n");
|
|
if (nframes > 0 && N > nframes)
|
|
N = nframes;
|
|
|
|
cout << "Start processing..." << endl
|
|
<< "Press ESC key to terminate" << endl;
|
|
|
|
UMat frame;
|
|
for (int i = 0; N > 0 ? (i < N) : true; i++)
|
|
{
|
|
CV_TRACE_REGION("FRAME"); // OpenCV Trace macro for named "scope" region
|
|
{
|
|
CV_TRACE_REGION("read");
|
|
capture.read(frame);
|
|
|
|
if (frame.empty())
|
|
{
|
|
cerr << "Can't capture frame: " << i << std::endl;
|
|
break;
|
|
}
|
|
|
|
// OpenCV Trace macro for NEXT named region in the same C++ scope
|
|
// Previous "read" region will be marked complete on this line.
|
|
// Use this to eliminate unnecessary curly braces.
|
|
CV_TRACE_REGION_NEXT("process");
|
|
process_frame(frame);
|
|
|
|
CV_TRACE_REGION_NEXT("delay");
|
|
if (waitKey(1) == 27/*ESC*/)
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|