【opencv】图像截取、合并、反色、canny边缘、二值化

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);


 
  
 
 

你可能感兴趣的:(编程语言)