What are the parameters passed to cvFindContours()

问题:

Please can some one explain about cvFindContours method and what are the parameters that it required?

For example, here's code using OpenCV:

hierarchy = cv2.findContours(thresh, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)

Please can some one explain how to write this using JavaCV?

回答1:

As comments mentioned by Mohammad those three parameters are header_size, mode and method. You can use this method as follows

    IplImage src = cvLoadImage(path);//hear path is actual path to image
    IplImage grayImage    = IplImage.create(src.width(), src.height(), IPL_DEPTH_8U, 1);
    cvCvtColor(src, grayImage, CV_RGB2GRAY);
    cvThreshold(grayImage, grayImage, 127, 255, CV_THRESH_BINARY);
    CvSeq cvSeq=new CvSeq();
    CvMemStorage memory=CvMemStorage.create();
    cvFindContours(grayImage, memory, cvSeq, Loader.sizeof(CvContour.class), CV_RETR_LIST, CV_CHAIN_APPROX_SIMPLE);

Hope this might help you to understand this method.