生活随笔
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鼠标移动区域局部放大
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這個程序類似于淘寶購物時，在商品圖像上移動鼠標，會出現一個放大鼠標周圍矩形區域內的局部圖像的窗口。話不多說，直接貼代碼。
[c-sharp]?view plaincopy
#include?<cv.h>?? #include?<highgui.h>?? #include?<stdio.h>?? #pragma?comment(?lib,?"cv.lib"?)?? #pragma?comment(?lib,?"cxcore.lib"?)?? #pragma?comment(?lib,?"highgui.lib"?)?? IplImage*?org?=?0;?? IplImage*?img?=?0;??? IplImage*?dst?=?0;??? int?foo=60;?? void?on_mouse(?int?event,?int?x,?int?y,?int?flags,?void*?ustc)?? {?? ????if(?event?==?CV_EVENT_MOUSEMOVE?&&?!(flags?&?CV_EVENT_FLAG_LBUTTON))?? ????{?? ????????cvCopy(org,img);?? ????????CvPoint?p0;?? ????????CvPoint?p1;?? ????????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));?? ????????cvSetImageROI(org,cvRect(p0.x,p0.y,p1.x-p0.x,p1.y-p0.y));?? ????????cvResize(org,dst);?? ????????cvResetImageROI(org);?? ????????cvShowImage(?"img",?img?);?? ????????cvShowImage("dst",dst);?? ????}?? }?? int?main()?? {?? ????org=cvLoadImage("lena.jpg",1);?? ????img=cvCloneImage(org);?? ????dst=cvCreateImage(cvSize(foo*4,foo*4),org->depth,org->nChannels);?? ????cvNamedWindow("img",1);?? ????cvSetMouseCallback(?"img",?on_mouse,?0?);?? ????cvShowImage("img",img);?? ????cvNamedWindow("dst",1);?? ????cvWaitKey(0);??? ????cvDestroyAllWindows();?? ????cvReleaseImage(&org);?? ????cvReleaseImage(&img);?? ????cvReleaseImage(&dst);?? ????return?0;?? }??
效果圖如下
總結
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