鼠标马赛克图像部分区域

这是一个简单的马赛克程序，利用选定矩形区域的平均值代替该区域各点的像素值。大家有没有更好的方法马赛克呢？

[c-sharp] view
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#include <cv.h>

#include <highgui.h>

#pragma comment( lib, "cv.lib" )

#pragma comment( lib, "cxcore.lib" )

#pragma comment( lib, "highgui.lib" )

IplImage* org = 0;

IplImage* img = 0;

IplImage* tmp = 0;

IplImage* dst = 0;

int foo=6;

void on_mouse( int event, int x, int y, int flags, void* ustc)

{

CvPoint p0;

CvPoint p1;

if( event == CV_EVENT_MOUSEMOVE && !(flags & CV_EVENT_FLAG_LBUTTON))

{

img=cvCloneImage(tmp);

cvResetImageROI(img);

if(x<foo)

{

if(y<foo)

{

p0=cvPoint(0,0);

p1=cvPoint(2*foo,2*foo);

}

else if(y>img->height-foo)

{

p0=cvPoint(0,img->height-2*foo);

p1=cvPoint(2*foo,img->height);

}

else

{

p0=cvPoint(0,y-foo);

p1=cvPoint(2*foo,y+foo);

}

}

else if(x>img->width-foo)

{

if(y<foo)

{

p0=cvPoint(img->width-2*foo,0);

p1=cvPoint(img->width,2*foo);

}

else if(y>img->height-foo)

{

p0=cvPoint(img->width-2*foo,img->height-2*foo);

p1=cvPoint(img->width,img->height);

}

else

{

p0=cvPoint(img->width-2*foo,y-foo);

p1=cvPoint(img->width,y+foo);

}

}

else

{

if(y<foo)

{

p0=cvPoint(x-foo,0);

p1=cvPoint(x+foo,2*foo);

}

else if(y>img->height-foo)

{

p0=cvPoint(x-foo,img->height-2*foo);

p1=cvPoint(x+foo,img->height);

}

else

{

p0=cvPoint(x-foo,y-foo);

p1=cvPoint(x+foo,y+foo);

}

}

cvRectangle(img,p0,p1,CV_RGB(0,255,0));

cvShowImage( "img", img );

}

else if( event == CV_EVENT_MOUSEMOVE && (flags & CV_EVENT_FLAG_LBUTTON))

{

if(x<foo)

{

if(y<foo)

{

p0=cvPoint(0,0);

p1=cvPoint(2*foo,2*foo);

}

else if(y>img->height-foo)

{

p0=cvPoint(0,img->height-2*foo);

p1=cvPoint(2*foo,img->height);

}

else

{

p0=cvPoint(0,y-foo);

p1=cvPoint(2*foo,y+foo);

}

}

else if(x>img->width-foo)

{

if(y<foo)

{

p0=cvPoint(img->width-2*foo,0);

p1=cvPoint(img->width,2*foo);

}

else if(y>img->height-foo)

{

p0=cvPoint(img->width-2*foo,img->height-2*foo);

p1=cvPoint(img->width,img->height);

}

else

{

p0=cvPoint(img->width-2*foo,y-foo);

p1=cvPoint(img->width,y+foo);

}

}

else

{

if(y<foo)

{

p0=cvPoint(x-foo,0);

p1=cvPoint(x+foo,2*foo);

}

else if(y>img->height-foo)

{

p0=cvPoint(x-foo,img->height-2*foo);

p1=cvPoint(x+foo,img->height);

}

else

{

p0=cvPoint(x-foo,y-foo);

p1=cvPoint(x+foo,y+foo);

}

}

dst=cvCloneImage(tmp);

cvSetImageROI(dst,cvRect(p0.x,p0.y,p1.x-p0.x,p1.y-p0.y));

CvScalar mean=cvAvg(dst);

cvSet(dst,mean);

cvResetImageROI(dst);

tmp=cvCloneImage(dst);

cvRectangle(dst,p0,p1,CV_RGB(0,255,0));

cvShowImage( "img", dst );

}

}

int main()

{

org=cvLoadImage("lena.jpg",1);

img=cvCloneImage(org);

tmp=cvCloneImage(org);

dst=cvCloneImage(org);

cvNamedWindow("img",1);

cvSetMouseCallback( "img", on_mouse, 0 );

cvShowImage("img",img);

cvWaitKey(0);

cvDestroyAllWindows();

cvReleaseImage(&org);

cvReleaseImage(&img);

cvReleaseImage(&tmp);

cvReleaseImage(&dst);

return 0;

}

效果图如下，这里马赛克了lena图的左眼。