比较中值模糊和高斯模糊对椒盐噪声处理效果

原图：

添加椒盐噪声后：

中值模糊处理后：

高斯模糊后：

本段代码：https://github.com/cyssmile/openCV_learning_notes/blob/master/opencv_test/opencv_020/opencv_020.cpp

#include<opencv2/opencv.hpp>
#include<iostream>
using namespace std;
using namespace cv;

void addSoaltAndPepperNoise(Mat &images, int numberOfNoise);
void addGaussianNoise(Mat &images,Scalar mean,Scalar meanDev);
void compareMedianBlurAndGaussianDealSAPN(Mat &images_noise,int SizeOfMedianKenel,
                                         Size GuassianKenel);

int main(int argc, char** argv)
{
    Mat src = imread("D:/images/hl.jpg", -1);
    if (src.empty())
    {
        cout << " can`t open this ph" << endl;
    }
    imshow("src_win", src);
    Mat images_src = src.clone();
    addSoaltAndPepperNoise(images_src, 10000);
    compareMedianBlurAndGaussianDealSAPN(images_src,3,Size(5,5));
    waitKey(0);
    destroyAllWindows();
    return 0;
}

/*
* add salt and pepper noise into source images
* cyssmile 
* 2020/3/15
*/
void addSoaltAndPepperNoise(Mat &images,int numberOfNoise) 
{
    RNG rng(12345);
    int row = images.rows;
    int col = images.cols;
    for (int i = 0; i < numberOfNoise; i++)
    {
        int x = rng.uniform(0, row);
        int y = rng.uniform(0, col);
        if (i % 2 == 0)
        {
            images.at<Vec3b>(x, y) = Vec3b(255, 255, 255);
        }
        else
        {
            images.at<Vec3b>(x, y) = Vec3b(0, 0, 0);
        }
    }
    imshow("salt and pepper noise", images);
}
/*
* add GaussianNoise into source image
* cyssmile
* 2020/3/15
*/
void addGaussianNoise(Mat &images, Scalar mean, Scalar meanDev) 
{
    Mat GaussianNoise = Mat::zeros(images.size(), images.type());
    randn(GaussianNoise, mean, meanDev);//randn会产生正态分布的噪声Mat
    Mat GaussianNoiseDst;
    add(images, GaussianNoise, images);
    imshow("GaussianNoiseDst_win", GaussianNoiseDst);
}
/*
* compare medianBlur and GaussianBlur in process a image with salt and pepper noise
* cyssmile
* 2020/3/15
*/
void compareMedianBlurAndGaussianDealSAPN(Mat &images_noise, int SizeOfMedianKenel,
                                            Size GuassianKenel) 
{
    imshow("salt and pepper noise image", images_noise);
    Mat dst;
    medianBlur(images_noise,dst, SizeOfMedianKenel);
    imshow("medianBlur",dst);

    Mat dst1;
    GaussianBlur(images_noise, dst1, GuassianKenel, 0, BORDER_DEFAULT);
    imshow("gaussianBlur", dst1);
}

比较中值模糊和高斯模糊对椒盐噪声处理效果

原文：https://www.cnblogs.com/cyssmile/p/12497338.html