opencv將矩形邊界框添加到輪廓

Question

我已經從圖像中找到了輪廓，現在我想將矩形邊界框應用於輪廓線我也希望計數應該在這裏着色是我正在使用的代碼

int main() 
{ 

    CvSeq*contours=0; 
    CvSeq* canny_contours = 0; 
    CvMemStorage*storage=cvCreateMemStorage(0); 
    CvMemStorage* canny_storage = cvCreateMemStorage(0); 

    IplImage*a=cvLoadImage("lisc.jpg"); 
    IplImage*b(cvCreateImage(cvGetSize(a),IPL_DEPTH_8U,1)); 
    IplImage*c(cvCreateImage(cvGetSize(b),IPL_DEPTH_8U,1)); 
    IplImage*d(cvCreateImage(cvGetSize(c),IPL_DEPTH_8U,1)); 

    cvCvtColor(a,b,CV_RGB2GRAY); 
    cvThreshold(b,c,128,255,CV_THRESH_BINARY); 
    cvCanny(c,d,50,150,3); 

    cvFindContours(c,storage,&contours,sizeof(CvContour), 
     CV_RETR_EXTERNAL, CV_CHAIN_CODE); 
    cvFindContours(d, canny_storage, &canny_contours, sizeof(CvContour), 
        CV_RETR_EXTERNAL, CV_CHAIN_CODE); 
    cvDrawContours(c,contours,cvScalar(255,255,255), cvScalarAll(255), 100); 


    //for(; canny_contours != 0; canny_contours = canny_contours->h_next) 
    //{ 
    //  CvScalar color = CV_RGB(rand()&200, rand()&200, rand()&200); 

    /* replace CV_FILLED with 1 to see the outlines */ 

    cvDrawContours(d, canny_contours, cvScalar(rand()&200,rand()&200,rand()&200), 
     cvScalarAll(rand()&200),1); 

    //} 

    cvNamedWindow("rola",CV_GUI_NORMAL); 
    cvNamedWindow("meaow0",CV_GUI_NORMAL); 
    cvShowImage("rola",c); 
    cvShowImage("meaow0",d); 
    cvWaitKey(0); 
    cvReleaseImage(&c); 
    cvReleaseImage(&d); 
} 

Answer 1

我不熟悉C風格的API。但也許你可以使用以下功能。

Rect r = cvBoundingRect(points,0); 

在C++中，點是 「的std ::矢量< CV ::點>」。

http://docs.opencv.org/modules/imgproc/doc/structural_analysis_and_shape_descriptors.html?highlight=boundingrect#boundingrect