opencv 连通域操作示例代码记录connectedComponentsWithStats()函数示例-Toy模板网

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opencv 连通域操作示例代码记录connectedComponentsWithStats()函数示例,opencv,机器人,c++,计算机视觉,单片机

void CrelaxMyFriendDlg::OnBnClickedOk()
{
	hdc = this->GetDC()->GetSafeHdc();
	// TODO: 在此添加控件通知处理程序代码
	string imAddr = "c:/Users/actorsun/Pictures/";
	string imAddr1 = imAddr+"rice.png";
	Mat relax1, positive;
	relax1 = imread(imAddr1);
	Mat relax;
	cvtColor(relax1, relax, COLOR_BGR2GRAY);
	threshold(relax, positive, 50, 255, THRESH_BINARY);
	imshow(positive);
	RNG rng(101);
	Mat a, b;
	int cout = connectedComponentsWithStats(positive, positive,a,b,8,CV_16U);
	//其中b是中心点的坐标，本例中是一个7行，2列的东西，每一行代表一个中心点坐标值
    imshow("1", positive);
	waitKey();
	vector<Vec3b> colors;
	for (int i = 0; i < cout; i++)
	{
		Vec3b vec(rng.uniform(0, 256), rng.uniform(0, 256), rng.uniform(0, 256));
		colors.push_back(vec);
	}
	Mat result(positive.rows,positive.cols,relax1.type());
	for (int row = 0; row < relax1.rows; row++)
	{
		for (int col = 0; col < relax1.cols; col++)
		{
			int temp = positive.at<uint16_t>(row,col);
			if (temp == 0)
				continue;
			result.at<Vec3b>(row, col) = colors[temp];
		}
	}
	imshow("标记后的图", result);
	waitKey();
	return;
}

/** @overload
@param image the 8-bit single-channel image to be labeled
@param labels destination labeled image
@param stats statistics output for each label, including the background label.
Statistics are accessed via stats(label, COLUMN) where COLUMN is one of
#ConnectedComponentsTypes, selecting the statistic. The data type is CV_32S.
@param centroids centroid output for each label, including the background label. Centroids are
accessed via centroids(label, 0) for x and centroids(label, 1) for y. The data type CV_64F.
@param connectivity 8 or 4 for 8-way or 4-way connectivity respectively
@param ltype output image label type. Currently CV_32S and CV_16U are supported.
*/
CV_EXPORTS_W int connectedComponentsWithStats(InputArray image, OutputArray labels,
                                              OutputArray stats, OutputArray centroids,
                                              int connectivity = 8, int ltype = CV_32S);

/** @brief Random Number Generator

Random number generator. It encapsulates the state (currently, a 64-bit
integer) and has methods to return scalar random values and to fill
arrays with random values. Currently it supports uniform and Gaussian
(normal) distributions. The generator uses Multiply-With-Carry
algorithm, introduced by G. Marsaglia (
<http://en.wikipedia.org/wiki/Multiply-with-carry> ).
Gaussian-distribution random numbers are generated using the Ziggurat
algorithm ( <http://en.wikipedia.org/wiki/Ziggurat_algorithm> ),
introduced by G. Marsaglia and W. W. Tsang.
*/
class CV_EXPORTS RNG
{
。。。
}

上面这个代码是MFC程序里面的一个函数，不能够直接运行，但是如果学过MFC相信没有问题完全能够看得懂。

opencv 连通域操作示例代码记录connectedComponentsWithStats()函数示例,opencv,机器人,c++,计算机视觉,单片机

public static final int
        CC_STAT_LEFT = 0,
        CC_STAT_TOP = 1,
        CC_STAT_WIDTH = 2,
        CC_STAT_HEIGHT = 3,
        CC_STAT_AREA = 4,
        CC_STAT_MAX = 5;

opencv 连通域操作示例代码记录connectedComponentsWithStats()函数示例,opencv,机器人,c++,计算机视觉,单片机