opencv分水岭算法 c++

以下是使用C++实现的OpenCV分水岭算法的示例代码：

#include <opencv2/opencv.hpp>
#include <iostream>

using namespace cv;
using namespace std;

int main()
{
    // 读取图像
    Mat src = imread("coins.jpg");
    if (src.empty())
    {
        cout << "could not load image..." << endl;
        return -1;
    }

    // 转换为灰度图像并进行二值化处理
    Mat gray, binary;
    cvtColor(src, gray, COLOR_BGR2GRAY);
    threshold(gray, binary, 0, 255, THRESH_BINARY_INV | THRESH_OTSU);

    // 形态学操作，去除噪声
    Mat kernel = getStructuringElement(MORPH_RECT, Size(3, 3));
    morphologyEx(binary, binary, MORPH_OPEN, kernel);

    // 距离变换
    Mat dist;
    distanceTransform(binary, dist, DIST_L2, 3, CV_32F);

    // 寻找种子点
    Mat dist_8u;
    dist.convertTo(dist_8u, CV_8U);
    vector<vector<Point>> contours;
    findContours(dist_8u, contours, RETR_EXTERNAL, CHAIN_APPROX_SIMPLE);
    Mat markers = Mat::zeros(dist.size(), CV_32S);
    for (size_t i = 0; i < contours.size(); i++)
    {
        drawContours(markers, contours, static_cast<int>(i), Scalar::all(static_cast<int>(i) + 1), -1);
    }
    circle(markers, Point(5, 5), 3, Scalar(255), -1);

    // 分水岭变换
    watershed(src, markers);

    // 显示结果
    imshow("src", src);
    imshow("watershed", markers * 10000);    waitKey(0);

    return 0;
}