学步园

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？

#include <cv.h><br /> #include <highgui.h><br /> #pragma comment( lib, "cv.lib" )<br /> #pragma comment( lib, "cxcore.lib" )<br /> #pragma comment( lib, "highgui.lib" )<br /> IplImage* org = 0;<br /> IplImage* img = 0;<br /> IplImage* tmp = 0;<br /> IplImage* dst = 0;<br /> int foo=6;<br /> void on_mouse( int event, int x, int y, int flags, void* ustc)<br /> {<br /> CvPoint p0;<br /> CvPoint p1;<br /> if( event == CV_EVENT_MOUSEMOVE && !(flags & CV_EVENT_FLAG_LBUTTON))<br /> {<br /> img=cvCloneImage(tmp);<br /> cvResetImageROI(img);<br /> if(x<foo)<br /> {<br /> if(y<foo)<br /> {<br /> p0=cvPoint(0,0);<br /> p1=cvPoint(2*foo,2*foo);<br /> }<br /> else if(y>img->height-foo)<br /> {<br /> p0=cvPoint(0,img->height-2*foo);<br /> p1=cvPoint(2*foo,img->height);<br /> }<br /> else<br /> {<br /> p0=cvPoint(0,y-foo);<br /> p1=cvPoint(2*foo,y+foo);<br /> }<br /> }<br /> else if(x>img->width-foo)<br /> {<br /> if(y<foo)<br /> {<br /> p0=cvPoint(img->width-2*foo,0);<br /> p1=cvPoint(img->width,2*foo);<br /> }<br /> else if(y>img->height-foo)<br /> {<br /> p0=cvPoint(img->width-2*foo,img->height-2*foo);<br /> p1=cvPoint(img->width,img->height);<br /> }<br /> else<br /> {<br /> p0=cvPoint(img->width-2*foo,y-foo);<br /> p1=cvPoint(img->width,y+foo);<br /> }<br /> }<br /> else<br /> {<br /> if(y<foo)<br /> {<br /> p0=cvPoint(x-foo,0);<br /> p1=cvPoint(x+foo,2*foo);<br /> }<br /> else if(y>img->height-foo)<br /> {<br /> p0=cvPoint(x-foo,img->height-2*foo);<br /> p1=cvPoint(x+foo,img->height);<br /> }<br /> else<br /> {<br /> p0=cvPoint(x-foo,y-foo);<br /> p1=cvPoint(x+foo,y+foo);<br /> }<br /> }<br /> cvRectangle(img,p0,p1,CV_RGB(0,255,0));<br /> cvShowImage( "img", img );<br /> }<br /> else if( event == CV_EVENT_MOUSEMOVE && (flags & CV_EVENT_FLAG_LBUTTON))<br /> {<br /> if(x<foo)<br /> {<br /> if(y<foo)<br /> {<br /> p0=cvPoint(0,0);<br /> p1=cvPoint(2*foo,2*foo);<br /> }<br /> else if(y>img->height-foo)<br /> {<br /> p0=cvPoint(0,img->height-2*foo);<br /> p1=cvPoint(2*foo,img->height);<br /> }<br /> else<br /> {<br /> p0=cvPoint(0,y-foo);<br /> p1=cvPoint(2*foo,y+foo);<br /> }<br /> }<br /> else if(x>img->width-foo)<br /> {<br /> if(y<foo)<br /> {<br /> p0=cvPoint(img->width-2*foo,0);<br /> p1=cvPoint(img->width,2*foo);<br /> }<br /> else if(y>img->height-foo)<br /> {<br /> p0=cvPoint(img->width-2*foo,img->height-2*foo);<br /> p1=cvPoint(img->width,img->height);<br /> }<br /> else<br /> {<br /> p0=cvPoint(img->width-2*foo,y-foo);<br /> p1=cvPoint(img->width,y+foo);<br /> }<br /> }<br /> else<br /> {<br /> if(y<foo)<br /> {<br /> p0=cvPoint(x-foo,0);<br /> p1=cvPoint(x+foo,2*foo);<br /> }<br /> else if(y>img->height-foo)<br /> {<br /> p0=cvPoint(x-foo,img->height-2*foo);<br /> p1=cvPoint(x+foo,img->height);<br /> }<br /> else<br /> {<br /> p0=cvPoint(x-foo,y-foo);<br /> p1=cvPoint(x+foo,y+foo);<br /> }<br /> }<br /> dst=cvCloneImage(tmp);<br /> cvSetImageROI(dst,cvRect(p0.x,p0.y,p1.x-p0.x,p1.y-p0.y));<br /> CvScalar mean=cvAvg(dst);<br /> cvSet(dst,mean);<br /> cvResetImageROI(dst);<br /> tmp=cvCloneImage(dst);<br /> cvRectangle(dst,p0,p1,CV_RGB(0,255,0));<br /> cvShowImage( "img", dst );<br /> }<br /> }<br /> int main()<br /> {<br /> org=cvLoadImage("lena.jpg",1);<br /> img=cvCloneImage(org);<br /> tmp=cvCloneImage(org);<br /> dst=cvCloneImage(org);<br /> cvNamedWindow("img",1);<br /> cvSetMouseCallback( "img", on_mouse, 0 );<br /> cvShowImage("img",img);<br /> cvWaitKey(0);<br /> cvDestroyAllWindows();<br /> cvReleaseImage(&org);<br /> cvReleaseImage(&img);<br /> cvReleaseImage(&tmp);<br /> cvReleaseImage(&dst);<br /> return 0;<br /> }

效果图如下，这里马赛克了lena图的左眼。