添加噪点、颜色缩放、图像克隆

#include<opencv2/opencv.hpp>
#include <iostream>
using namespace std;
using namespace cv;
void salt(Mat &image, int n);
int main()
{
    /*
    Mat image,result;
    cout << "size," << image.size().height << "," << image.size().width << endl;
    image = imread("C:\\Users\\Nelsoner\\Desktop\\Camera Roll\\01.jpg");
    flip(image, result, 422);
    namedWindow("Output");
    imshow("Output", result);
    //cout << "size," << image.size().height << "," << image.size().width << endl;
    */
    /*
    Mat image(300, 300, CV_8UC3, Scalar(122));
    namedWindow("Output");
    imshow("Output",image);
    */
    Mat image = imread("C:\\Users\\Nelsoner\\Desktop\\Camera Roll\\05.jpg");
    //调用函数，添加噪点
    salt(image, 30000);
    namedWindow("Output");
    imshow("Output", image);
    waitKey(50000);
    return 0;
}

void salt(Mat &image, int n) {    //添加噪点
    for (int k = 0; k < n; k++) {
        int i = rand() % image.cols;
        int j = rand() % image.rows;
        if (image.channels() == 1) {   //灰度图
            image.at<uchar>(j, i) == 25;
        }
        else if (image.channels() == 3) {   //彩色图
            image.at<Vec3b>(j, i)[0] = 25;
            image.at<Vec3b>(j, i)[1] = 25;
            image.at<Vec3b>(j, i)[2] = 25;
        }
    }
}

 

int main(int argc, char ** argv) {
    Mat image = imread("C:\\Users\\Nelsoner\\Desktop\\Camera Roll\\05.jpg");
    Mat imageClone = image.clone();    //克隆图像
    Mat i = imageClone(Rect(40, 40, 500, 500));
    Mat j;
    j.create(image.rows/2, image.cols/2, image.type());
    circle(i, Point(50, 50), 80, Scalar(15, 5, 225), 5);
    namedWindow("hah");
    imshow("hah", imageClone);
    namedWindow("hei");
    imshow("hei",j);

    waitKey(100000);
}