如何在圖像上繪製模糊的矩形？

Question

我找到一個代碼，它允許您在凸輪上繪製模糊的矩形

我試圖將它從凸輪上的模糊矩形繪製到圖像上，因爲我想在圖像上繪製模糊的矩形。

，這是我的代碼

#include < stdio.h> 
#include < iostream> 
#include < opencv2\opencv.hpp> 
#include < opencv2/core/core.hpp> 
#include < opencv2/highgui/highgui.hpp> 
#include < opencv2/video/background_segm.hpp> 
#include < opencv2\gpu\gpu.hpp> 
#include < opencv2\legacy\legacy.hpp> 

using namespace std; 
using namespace cv; 

bool selectObject = false; 
Rect selection; 
Point origin; 
int trackObject = 0; 
Mat image; 

static void onMouse(int event, int x, int y, int, void*) 
{ 
if (selectObject) 
{ 
    selection.x = MIN(x, origin.x); 
    selection.y = MIN(y, origin.y); 
    selection.width = std::abs(x - origin.x); 
    selection.height = std::abs(y - origin.y); 

    selection &= Rect(0, 0, image.cols, image.rows); 
} 

switch (event) 
{ 
case CV_EVENT_LBUTTONDOWN: 

    origin = Point(x, y); 
    selection = Rect(x, y, 0, 0); 
    selectObject = true; 
    break; 
case CV_EVENT_LBUTTONUP: 
    selectObject = false; 
    if (selection.width > 0 && selection.height > 0) 
     trackObject = -1; 
    break; 

    } 
} 


int main(void) 
{ 
Mat img; 
img = imread("C:/Users/faho0odywbas/Desktop/test.jpg"); 
Mat frame; 
namedWindow("Demo"); 
setMouseCallback("Demo", onMouse); 

for (;;) 
{ 

    frame.copyTo(image); 


    if (selectObject && selection.width > 0 && selection.height > 0) 
    { 
     Mat roi(image, selection); 
     bitwise_not(roi, roi); 
     printf("%d %d %d %d\n", selection.x, selection.y, selection.width, selection.height); 
    } 
    while (1){ 
    imshow("Demo", img); 

    if (waitKey(10) > 10) 
     break; 
    } 
} 

return 0; 
} 

和代碼顯示圖像，但我不能借鑑它的矩形！

我想念什麼？

謝謝

Answer 1

我已對您的來源進行了一些修改。幾乎完成你想要的一切！

#include <opencv2/core/core.hpp> 
#include <opencv2/highgui/highgui.hpp> 
#include <opencv2/imgproc/imgproc.hpp> 

#include <iostream> 

using namespace std; 
using namespace cv; 

bool selectObject = false; 
Rect selection; 
Point origin; 
int msize = 5; 
Mat image,blurredImage; 

vector<Rect> blurredAreas; 

static bool doMosaic(Mat img, int msize) 
{ 
    for (int i = 0; i < img.cols-msize; i+=msize) 
     for(int j = 0; j < img.rows-msize; j+=msize) 
     { 
      Rect r = Rect(i,j,msize,msize); 
      Mat mosaic = img(r); 
      mosaic.setTo(mean(mosaic)); 
     } 
    return true; 
} 

static bool doBlur() 
{ 
    for(size_t i = 0; i< blurredAreas.size(); i++) 
    { 
     Mat roi = blurredImage(selection); 
     //GaussianBlur(roi,roi,Size(),5,5); 
     doMosaic(roi,msize); 
    } 
    imshow("Demo", blurredImage); 
    return true; 
} 



static void onMouse(int event, int x, int y, int, void*) 
{ 
    switch (event) 
    { 
    case CV_EVENT_LBUTTONDOWN: 
     origin = Point(x, y); 
     selectObject = true; 
     break; 
    case CV_EVENT_LBUTTONUP: 
    { 
     selectObject = false; 
     blurredAreas.push_back(selection); 
     doBlur(); 
     break; 
    } 
    } 

    if (selectObject) 
    { 
     selection.x = MIN(x, origin.x); 
     selection.y = MIN(y, origin.y); 
     selection.width = std::abs(x - origin.x)+1; 
     selection.height = std::abs(y - origin.y)+1; 
     selection &= Rect(0, 0, image.cols, image.rows); 

     if (selection.width > 0 && selection.height > 0) 
     { 
      Mat blurredImagecopy; 
      blurredImage.copyTo(blurredImagecopy); 
      Mat roi = blurredImagecopy(selection); 
      bitwise_not(roi, roi); 
      imshow("Demo", blurredImagecopy); 
     } 
    } 
} 


int main(void) 
{ 
    image = imread("test.jpg"); 
    image.copyTo(blurredImage); 

    namedWindow("Demo"); 
    setMouseCallback("Demo", onMouse); 

    imshow("Demo", image); 

    while(true) 
    { 
     int key = waitKey(0); 

     if(key == 27) 
      break; 

     if(key == 's') // saves result image 
     { 
      imwrite("result.jpg",blurredImage); 
     } 

     if(key == 'i') // space key for clear blurred areas 
     { 
      msize +=5; 
      image.copyTo(blurredImage); 
      doBlur(); 
     } 

     if(key == 'd') // space key for clear blurred areas 
     { 
      msize = msize == 5 ? 5 : msize - 5; 
      image.copyTo(blurredImage); 
      doBlur(); 
     } 

     if(key == 32) // space key for clear blurred areas 
     { 
      blurredAreas.clear(); 
      image.copyTo(blurredImage); 
      doBlur(); 
     } 
    } 
    return 0; 
}