利用Hu不变矩进行特征提取

#include "stdafx.h"

#include <opencv2/opencv.hpp>

#include <string>

int _tmain(int argc, _TCHAR* argv[])

{   string strImageName = "F:\\base.jpg";

    IplImage *imgSrc, *imgTmp;

    imgSrc = cvLoadImage(strImageName.c_str(), 2 | 4);

    imgTmp = cvCreateImage(cvGetSize(imgSrc), IPL_DEPTH_8U, 1);

    cvSetZero(imgTmp);

    if (imgSrc->nChannels == 3)

    {

        cvCvtColor(imgSrc, imgTmp, CV_BGR2GRAY);

    }

    else

    {

        cvCopy(imgSrc, imgTmp);

    }

    CvMoments moments;

    CvHuMoments humoments;

    cvMoments(imgTmp, &moments, 0);

    cvGetHuMoments(&moments, &humoments);

    cout<<humoments.hu1<<"  "<<humoments.hu2<<"  "<<humoments.hu3<<"  "<<humoments.hu4<<"  "<<humoments.hu5<<"  "<<humoments.hu6<<"  "<<humoments.hu7<<endl;

    cvReleaseImage(&imgSrc);

    cvReleaseImage(&imgTmp);

    return 0;

}

/* Spatial and central moments */

typedef struct CvMoments

{

    double  m00, m10, m01, m20, m11, m02, m30, m21, m12, m03; /* spatial moments */

    double  mu20, mu11, mu02, mu30, mu21, mu12, mu03; /* central moments */

    double  inv_sqrt_m00; /* m00 != 0 ? 1/sqrt(m00) : 0 */

}

CvMoments;

/* Hu invariants */

typedef struct CvHuMoments

{

    double hu1, hu2, hu3, hu4, hu5, hu6, hu7; /* Hu invariants */

}

CvHuMoments;

参考文献：

1、  http://www.cnblogs.com/seacode/archive/2011/03/17/1987413.html

2、  http://download.csdn.net/download/wshsh2010/3026538

3、  http://archive.cnblogs.com/a/2110183/

4、  http://blog.csdn.net/shandianling/article/details/6456097

5、  http://blog.sina.com.cn/s/blog_73ee929c01010f45.html

6、  http://blog.csdn.net/fdl19881/article/details/6736477