将一张图片的三个RGB分量分别取出来

最新推荐文章于 2023-11-21 19:41:28 发布

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最新推荐文章于 2023-11-21 19:41:28 发布 · 8.3k 阅读

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#dst #merge

上图:

Mat process(Mat &img);
int main()
{
	VideoCapture cap("video/Megamind.avi");
	if (!cap.isOpened())
	{
		cout << "could not open" << endl;
		return -1;
	}

	Mat frame;
	cap >> frame;

	Size S = Size((int) cap.get(CV_CAP_PROP_FRAME_WIDTH),
	(int) cap.get(CV_CAP_PROP_FRAME_HEIGHT));

	VideoWriter w;
	w.open("test.avi", CV_FOURCC('X', 'V', 'I', 'D'), cap.get(CV_CAP_PROP_FPS), S + Size(10,10)	);

	Mat dst;
	do
	{
		cap >> frame;
		dst = process(frame);
		w << dst;
	}while (frame.data);
	cout << "done" << endl;
	return 0;
}

Mat process(Mat &img)
{
	Mat src;
	pyrDown(img, src);
	Mat bgr_res[3];
	Mat bgr[3];
	for( int j = 0 ; j < 3; j++)
	{
		split(src, bgr);
		for (int i=0; i<3; ++i)
		{
			if (i != j )
				bgr[i] = Mat::zeros(src.size(), bgr[0].type());
		}
		merge(