#include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc/imgproc.hpp> #include <iostream>  using namespace cv; using namespace std;  Mat inputImage; Mat inputImage_mosaic; Mat inputImage_clone;  //馬賽克的大小 int neightbourhood = 20;  //記錄鼠標的狀態，0為鼠標左鍵未按下或彈起，1為鼠標左鍵按下 int mouseStatus = 0;  void onMouse(int events, int x, int y, int flag, void* ustg);  //創建馬賽克圖片 void createMosaicImage(Mat inputMat, Mat& outputMat, int size);  //設置馬賽克區域 void setMosaic(Mat& inputMat, Rect rect);  int main(void){  inputImage = imread("test2.jpg");  inputImage_clone = inputImage.clone();  createMosaicImage(inputImage, inputImage_mosaic, neightbourhood);   namedWindow("showImage", 0);  setMouseCallback("showImage", onMouse);   waitKey();  return 0; }  void createMosaicImage(Mat inputMat, Mat& outputMat, int size){  RNG rng;  int height = inputMat.rows;  int width = inputMat.cols;  Mat padding;  Mat tempMat;   //為了方便后面的計算，將輸入的圖像大小擴充到寬高都是size的倍數  copyMakeBorder(inputMat, padding, 0, size - inputMat.rows % size, 0, size - inputMat.cols % size, BORDER_REPLICATE);  tempMat = padding.clone();   for (int row = 0; row < padding.rows; row += size){  for (int col = 0; col < padding.cols; col += size){   int rand_x = rng.uniform(0, size);   int rand_y = rng.uniform(0, size);   Rect rect = Rect(col, row, size, size);   Mat roi = tempMat(rect);   Scalar color = Scalar(padding.at<Vec3b>(row + rand_y, col + rand_x)[0], /   padding.at<Vec3b>(row + rand_y, col + rand_x)[1], /   padding.at<Vec3b>(row + rand_y, col + rand_x)[2]);   roi.setTo(color);  }  }  outputMat = tempMat(Rect(0, 0, width, height)).clone(); }  void setMosaic(Mat& inputMat, Rect rect){  Mat roi = inputMat(rect);  Mat tempRoi = inputImage_mosaic(rect);  tempRoi.copyTo(roi); }  void onMouse(int events, int x, int y, int flag, void* ustg){   //當鼠標移除圖片區域的時候，不做操作  if (x < 0 || x > inputImage.cols || y < 0 || y > inputImage.rows){  return;  }   //馬賽克塊的位置信息  int x_left, x_right, y_top, y_bottom;  x - neightbourhood <= 0 ? x_left = 0 : x_left = x - neightbourhood;  x + neightbourhood > inputImage.cols ? x_right = inputImage.cols: x_right = x + neightbourhood;  y - neightbourhood <= 0 ? y_top = 0 : y_top = y - neightbourhood;  y + neightbourhood > inputImage.rows ? y_bottom = inputImage.rows: y_bottom = y + neightbourhood;   if (events == CV_EVENT_LBUTTONDOWN){  mouseStatus = 1;  setMosaic(inputImage_clone, Rect(x_left, y_top, x_right - x_left, y_bottom - y_top));  }  else if (events == CV_EVENT_MOUSEMOVE){  if (mouseStatus == 1){   setMosaic(inputImage_clone, Rect(x_left, y_top, x_right - x_left, y_bottom - y_top));  }  else{   //nothing  }  }  else if (events == CV_EVENT_LBUTTONUP){  mouseStatus = 0;  }  else {  //cout << "nothing" << endl;  }  imshow("showImage", inputImage_clone); }