生成椒盐噪声函数

不BB，直接上代码，n 表示噪声点数。函数采用全图正态分布生成椒盐噪声点

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

using namespace std;
using namespace cv;

void salt(Mat image, int n)
{
    std::default_random_engine generator;
    std::uniform_int_distribution<int> randomRow(0, image.rows - 1);
    std::uniform_int_distribution<int> randomCol(0, image.cols - 1);

    int i, j;
    for (int k = 0; k < n; k++) {
        // 随机生成图形位置
        i = randomRow(generator);
        j = randomCol(generator);

        if (image.type() == CV_8UC1) {
            image.at<uchar>(i, j) = 255;
        }
        else if(image.type() == CV_8UC3) {
            image.at<Vec3b>(i, j)[0] = 255;
            image.at<Vec3b>(i, j)[1] = 255;
            image.at<Vec3b>(i, j)[2] = 255;
        }
    }
}

image.png