opencv中Mat存储图像和遍历图像像素

#include <opencv2\highgui\highgui.hpp>
#include <iostream>using namespace  cv;
using namespace  std;int main(int argc, const char** argv)
{Mat img = imread("F:\\Image\\6.jpg", CV_LOAD_IMAGE_UNCHANGED);  //Mat存储图片cout << img.rows << endl;cout << img.cols << endl;cout << img.dims << endl;	     //维度cout << img.channels() << endl;  //通道数if(img.empty()){cout << "图像加载失败！"<< endl;return -1;}//遍历像素点for (int i = 0; i < img.rows; ++i){for (int j = 0; j < img.cols; ++j){if (img.at<Vec3b>(i, j)[2]>180){img.at<Vec3b>(i, j) = Vec3b(255, 255, 255);}}}
//创建一个名字为MyWindow的窗口
namedWindow("MyWindow", CV_WINDOW_AUTOSIZE);
//在MyWindow的窗中中显示存储在img中的图片
imshow("MyWindow", img);
//等待直到有键按下
waitKey(0);
//销毁MyWindow的窗口
destroyWindow("MyWindow");
return 0;
}