OpenCv - 輪廓練習二（8.1）

OpenCV3 中cvFindDominantPoints 這個函數用什麼替代了？

題目：用keynote畫了一個圖片，然後灰度化、二值化、查找輪廓，描述輪廓，最後查看關鍵點。

#include <iostream>
#include <opencv2/opencv.hpp>
#include <opencv2/highgui.hpp>

using namespace std;
using namespace cv;

#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()
{
    /*1、載入一個圖像，轉化爲灰度圖像*/
    const char filename[] = "/Users/linwang/Downloads/car_2/car_2.001.jpeg";
    IplImage * Gray_Img = cvLoadImage(filename,CV_LOAD_IMAGE_GRAYSCALE);
    cvShowImage("Gray", Gray_Img);
    
    /*2、二值化*/
    IplImage * D_V_Img = cvCreateImage(cvGetSize(Gray_Img), Gray_Img->depth, Gray_Img->nChannels);
    cvSetZero(D_V_Img);
    cvThreshold(Gray_Img, D_V_Img, 20, 255, CV_THRESH_BINARY);
    cvShowImage("D-V", D_V_Img);
    
    /*3、查找輪廓*/
    CvMemStorage * storage = cvCreateMemStorage();
    CvSeq * first_contour = NULL;
    cvFindContours(D_V_Img, storage, &first_contour,sizeof(CvContour),CV_RETR_LIST);
    cout<<"Total Point is "<<first_contour->total<<endl;
    for (int i = 0; i < first_contour->total; i++)
    {
        CvPoint *pt  = (CvPoint *) cvGetSeqElem(first_contour, i);
        cout<<"lunkuo Point : "<<pt->x<<" , "<<pt->y<<endl;
    }
    /*4、繪製輪廓*/
    cvDrawContours(D_V_Img, first_contour, 255, 255, 100);
    cvShowImage("Contours", D_V_Img);
    
    /*5、查找關鍵點*/
    
    IplImage * KeyImg = cvCreateImage(cvGetSize(D_V_Img), D_V_Img->depth, D_V_Img->nChannels);
    cvSetZero(KeyImg);
    CvSeq * dominant = NULL;
    //cvFindDominantPoints(first_contour,dominant);
    cout<<"Ap Poly Total is "<<dominant->total<<endl;
    for (int i = 0; i < dominant->total; i++)
    {
        CvPoint *pt  = (CvPoint *) cvGetSeqElem(dominant, i);
        cout<<"App Point : "<<pt->x<<" , "<<pt->y<<endl;
        cvCircle( KeyImg, *pt , 100, cvScalar(255) );
    }
    cvShowImage("Key-Points", KeyImg);
    
    cvWaitKey(0);
    cvReleaseImage(&KeyImg);
    cvReleaseImage(&D_V_Img);
    return 0;
}