opencv(c++)简单笔记

• 链接地址
• 1.图片读取与显示
• 2.视频读取与写入

https://www.bilibili.com/video/BV1i54y1m7tw?p=2

#include
#include

using namespace cv;
using namespace std;

int main(int argc, char** argv) {
	Mat src = imread("D:/MyWorkSpace/C++/opencv_tutorial_data-master/images/vehicle_test1.jpg", IMREAD_GRAYSCALE);
	if (src.empty()) {
		printf("could not load image ...");
		return -1;
	}
	namedWindow("input window", WINDOW_FREERATIO);
	imshow("input window", src);
	waitKey(0);
	destroyAllWindows();
	return 0;
}

#include
#include

using namespace cv;
using namespace std;


int main(int argc, char** argv) {
	VideoCapture capture("D:/MyWorkSpace/C++/opencv_tutorial_data-master/images/video.avi");
	int count = capture.get(CAP_PROP_frame_COUNT);
	int fps = capture.get(CAP_PROP_FPS);
	std::cout << "count:" << count << std::endl;
	std::cout << "fps:" << fps << std::endl;

	int frame_width = capture.get(CAP_PROP_frame_WIDTH);
	int frame_height = capture.get(CAP_PROP_frame_HEIGHT);
	VideoWriter writer("D:/MyWorkSpace/C++/opencv_tutorial_data-master/images/video2.avi", capture.get(CAP_PROP_FOURCC), fps, Size(frame_width, frame_height), true);

	Mat frame;
	while (true)
	{
		capture.read(frame);
		if (frame.empty()) {
			break;
		}
		imshow("frame", frame);

		Mat gray, hsv;
		cvtColor(frame, hsv, COLOR_BGR2HSV);
		writer.write(frame);
		int c = waitKey(10);
		if (c == 27) {
			break;
		}

	}

	//release
	capture.release();
	writer.release();
}