如何将具有两个通道的Mat转换为vector<vector<int>>？

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

using namespace std;
using namespace cv;

vector<vector<int>> matToVector(Mat& image) {
    vector<vector<int>> result;
    for (int i = 0; i < image.rows; i++) {
        vector<int> row;
        for (int j = 0; j < image.cols; j++) {
            Vec3b pixel = image.at<Vec3b>(i, j);
            row.push_back(pixel[0]);  // 存储第一个通道的值
            row.push_back(pixel[1]);  // 存储第二个通道的值
        }
        result.push_back(row);
    }
    return result;
}

int main() {
    Mat image = imread("image.jpg");  // 读取图片
    if (image.empty()) {
        cout << "Failed to read image!" << endl;
        return -1;
    }

    vector<vector<int>> result = matToVector(image);

    // 打印转换后的结果
    for (int i = 0; i < result.size(); i++) {
        for (int j = 0; j < result[i].size(); j++) {
            cout << result[i][j] << " ";
        }
        cout << endl;
    }

    return 0;
}