【opencv】图像截取、合并、反色、canny边缘、二值化
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图像截取: IplImage *src1 = cvGetImage(cvGetSubRect(src, cvCreateMatHeader(width,height, CV_8UC1), cvRect(pointX, pointY, width,height)), cvCreateImageHeader(cvSize(width,height), 8, 1));//截取起始点:(pointX, pointY),截取宽度:width,截取长度:height图像合并: //将图像img1,img2()合并为img, IplImage* img=cvCreateImage(cvSize(img1->width+img2->width,img1->height+img2->height),img1->depth,img1->channels); CvRect rect=cvRect(0,0,img1->width,img1->height); cvSetImageROI(img,rect);//设置图像感兴趣区域 cvCopy(img1,img); cvResetImageROI(img); rect=cvRect(img1->width,0,img2->width,img2->height); cvSetImageROI(img,rect); cvCopy(img2,img); cvResetImageROI(img);图像反色: cvXorS(img, cvScalarAll(255), img);图像求canny边缘: IplImage* src; src=cvLoadImage(“路径”,1);//读取彩色图//-------canny IplImage* dst = cvCreateImage( cvGetSize(src), 8, 1 ); IplImage* src1=cvCreateImage(cvSize(src->width,src->height),IPL_DEPTH_8U,1); cvCvtColor(src, src1, CV_BGR2GRAY); //把src转换成灰度图像保存在src1中,注意进行边缘检测一定要换成灰度图 cvCanny( src1, dst, 20,200, 3 );//参数50,200的灰度变换 ShowImage(dst, IDC_STATIC_PIC);图像二值化: IplImage* src; src=cvLoadImage(“路径”,1);//读取彩色图 IplImage* dst = cvCreateImage( cvGetSize(src), 8, 1 ); IplImage* src1=cvCreateImage(cvSize(src->width,src->height),IPL_DEPTH_8U,1); cvCvtColor(src, src1, CV_BGR2GRAY); //把src转换成灰度图像保存在src1中 cvThreshold( src1,dst,100, 255, CV_THRESH_BINARY );//二值化: ShowImage(dst, IDC_STATIC_PIC);
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