opencv学习笔记（01）——操作图像的像素

 #include <opencv2\core\core.hpp>
 #include <opencv2\highgui\highgui.hpp>
 #include <opencv2\imgproc\imgproc.hpp>
 #include <iostream>

 void salt(cv::Mat& image, int n)
 {

     for(int k=; k<n; k++)
     {

         int i = rand() % image.cols;
         int j = rand() % image.rows;        

         // 灰度图像
         if(image.channels() == )
         {
             cv::Mat_<uchar> img = image;
             img(j,i) = ;
         }else{// 彩色图像
             cv::Mat_<cv::Vec3b> img = image;
             //image.at<cv::Vec3b>(j,i)[0] = 255;
             //image.at<cv::Vec3b>(j,i)[1] = 255;
             //image.at<cv::Vec3b>(j,i)[2] = 255;            

             img(j,i)[] = ;
             img(j,i)[] = ;
             img(j,i)[] = ;
         }

     }

 }

 int main(int argc, char** argv)
 {

     cv::Mat img = cv::imread("F:\\images\\boldt.jpg");
     cv::Mat img2 = img.clone();    

     double duration;
     duration = static_cast<double>(cv::getTickCount());

     salt(img, );    

     duration = static_cast<double>(cv::getTickCount()) - duration;
     duration /= cv::getTickFrequency();

     cv::namedWindow("original");
     cv::imshow("original", img);
     cv::namedWindow("altered");
     cv::imshow("altered", img2);

     std::cout << duration << std::endl;

     cv::waitKey();
     return ;

 }