49 lines
1.1 KiB
C++
49 lines
1.1 KiB
C++
#include <iostream>
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#include <opencv2/opencv.hpp>
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#include <opencv2/highgui/highgui.hpp>
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int main()
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{
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cv::VideoCapture camera(0);
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if (!camera.isOpened())
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{
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std::cerr << "[ERROR] Could not open the camera!" << std::endl;
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return 1;
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}
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cv::namedWindow("Webcam", cv::WINDOW_AUTOSIZE);
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while(true)
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{
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cv::Mat frame;
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camera >> frame;
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cv::imshow("Webcam", frame);//normal
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//---------- grey
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cv::Mat frame_gray;
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cv::cvtColor(frame,frame_gray,cv::COLOR_BGR2GRAY);
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//cv::imshow("gray",frame_gray);//grey
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//----------- treshold
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cv::Mat frame_thresh;
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threshold(frame_gray, frame_thresh, 150, 255, cv::THRESH_BINARY);
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//cv::imshow("thresh", frame_thresh);
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//----------- contour
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std::vector<std::vector<cv::Point>> contours;
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std::vector<cv::Vec4i> hierarchy;
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findContours(frame_thresh, contours, hierarchy, cv::RETR_TREE, cv::CHAIN_APPROX_NONE);
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cv::Mat frame_contours = frame.clone();
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drawContours(frame_contours, contours, -1, cv::Scalar(0, 255, 0), 2);
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cv::imshow("contours", frame_contours);
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if (cv::waitKey(30) >= 0)
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break;
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}
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return 0;
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}
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