test

// p243 ex8-3



#include 

#include 



#define CVX_RED         CV_RGB(0xff,0x00,0x00)

#define CVX_GREEN       CV_RGB(0x00,0xff,0x00)

#define CVX_BLUE        CV_RGB(0x00,0x00,0xff)





int main() {

    cvNamedWindow("contour", 1);

    

    IplImage *img_8uc1 = cvLoadImage("/Users/yusuke/Dropbox/openCV/OpenCV env/OpenCV env/data/stuff.jpg", CV_LOAD_IMAGE_GRAYSCALE);

    IplImage *img_edge = cvCreateImage(cvGetSize(img_8uc1), 8, 1);

    IplImage *img_8uc3 = cvCreateImage(cvGetSize(img_8uc1), 8, 3);

    

    cvThreshold(img_8uc1, img_edge, 128, 255, CV_THRESH_BINARY);

    

    CvMemStorage *storage = cvCreateMemStorage();

    CvSeq *first_contour = NULL;

    

    //last argument is mode, there are other modes!!, returning the number of contours found

    int Nc = cvFindContours(img_edge, storage, &first_contour, sizeof(CvContour), CV_RETR_EXTERNAL);   

    

    int n = 0;

    printf("Total Contours Detected: %d\n", Nc);

    for (CvSeq *c = first_contour; c != NULL; c = c->h_next) { // traverse the list of found contour

        cvCvtColor(img_8uc1, img_8uc3, CV_GRAY2BGR);

        

        // draw that contour using color, color is defined above 

        cvDrawContours(img_8uc3, c, CVX_RED, CVX_BLUE, 0, 2, 8);

        printf("contour #%d\n", n);

        cvShowImage("contour",  img_8uc3);  

        printf(" %d elements: \n", c->total);     // c->total is the number of edges,or  points

        for (int i = 0; i < c->total; i++) {     // traverse the all edges of that contour

            CvPoint *p = CV_GET_SEQ_ELEM(CvPoint, c, i);

            printf(" (%d, %d)\n", p->x, p->y);

        }

        cvWaitKey(0);

        n++;

    }

    printf("Finished\n");

    cvCvtColor(img_8uc1, img_8uc3, CV_GRAY2BGR);

    cvShowImage("contour", img_8uc3);

    cvWaitKey(0);

    

    return 0;

}