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include <opencv2 core="" core.hpp="">
<opencv2/core/core.hpp>
include <opencv2 highgui="" highgui.hpp="">
<opencv2/highgui/highgui.hpp>
include <opencv2 imgproc="" imgproc.hpp="">
 
<opencv2/imgproc/imgproc.hpp>

include <iostream>
 
<iostream>

using namespace std;
using namespace cv;
 
cv;

bool selectObject = false;
Rect selection;
Point origin;
int msize = 5;
Mat image, blurredImage;
 
vector<rect> blurredAreas;
 
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(int argc, char** argv)
{
    image = imread("c:/aa/Adel.png");
    if (image.empty())                      // Check for invalid input
    {
        cout << "Could not open or find the image" << std::endl;
        return -1;
    }
    image.copyTo(blurredImage);
 
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') // for increasing mosaic size
    {
    {
            msize += 5;
         image.copyTo(blurredImage);
         doBlur();
    }

    }

        if (key == 'd') // key 'd'  for decreasing mosaic size
    {
    {
            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;
}
  
}