39 lines
1000 B
C++
39 lines
1000 B
C++
#include <opencv2/opencv.hpp>
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const std::string WINDOW_NAME = "A Scanner Darkly";
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const std::string LOWER_THRESHOLD_TRACKBAR_NAME = "Canny: Lower Threshold";
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const std::string UPPER_THRESHOLD_TRACKBAR_NAME = "Canny: Upper Threshold";
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int g_Canny_lower_threshold = 110;
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int g_Canny_upper_threshold = 300;
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int main(int argc, char** argv ) {
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cv::VideoCapture cap;
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cap.open(0);
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if (!cap.isOpened()) {
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std::cerr << "Couldn't open capture" << std::endl;
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return -1;
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}
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cv::namedWindow(WINDOW_NAME);
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cv::createTrackbar(LOWER_THRESHOLD_TRACKBAR_NAME, WINDOW_NAME, &g_Canny_lower_threshold, 1000, NULL);
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cv::createTrackbar(UPPER_THRESHOLD_TRACKBAR_NAME, WINDOW_NAME, &g_Canny_upper_threshold, 1000, NULL);
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cv::Mat frame, cannyFrame;
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while (true) {
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cap >> frame;
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cv::Canny(frame, cannyFrame, g_Canny_lower_threshold, g_Canny_upper_threshold);
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cv::imshow(WINDOW_NAME, cannyFrame);
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char c = (char)cv::waitKey(33);
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if (c == 27) {
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break;
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}
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}
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cv::destroyWindow(WINDOW_NAME);
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}
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