人脸识别

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// 人脸识别.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "cv.h"#include "highgui.h"#include <stdio.h>static CvHaarClassifierCascade* cascade = 0;static CvMemStorage* storage = 0;void detect_and_draw( IplImage* image );const char* cascade_name ="haarcascade_frontalface_alt.xml";                //人脸检测要用到的分类器int main(int argc, char* argv[]){     cascade = (CvHaarClassifierCascade*)cvLoad( cascade_name, 0, 0, 0 );   //加载人脸检测所用的分类器     if( !cascade )     {        fprintf( stderr, "ERROR: Could not load classifier cascade\n" );        return -1;     }     storage = cvCreateMemStorage(0);                                       //动态存储结构，用来存储人脸在图像中的位置     cvNamedWindow( "result", 1 ); cvNamedWindow( "gray", 1); cvNamedWindow("face",1);     const char* filename = "lena.jpg";                                     //待检测图像(包含绝对路径) //const char* filename = "景甜.jpg";     IplImage* image = cvLoadImage( filename, 1 );                          //加载图像     detect_and_draw( image );                                              //对加载的图像进行检测     cvWaitKey(0);     cvReleaseImage( &image );     cvDestroyWindow("result"); cvDestroyWindow("gray");     return 0;}void detect_and_draw( IplImage* img ){    static CvScalar colors[] =     {        {{0,0,255}},        {{0,128,255}},        {{0,255,255}},        {{0,255,0}},        {{255,128,0}},        {{255,255,0}},        {{255,0,0}},        {{255,0,255}}    };     double scale = 1.3;    IplImage* gray = cvCreateImage( cvSize(img->width,img->height), 8, 1 );    IplImage* small_img = cvCreateImage( cvSize( cvRound (img->width/scale),                         cvRound (img->height/scale)), 8, 1 );     cvCvtColor( img, gray, CV_BGR2GRAY );    cvResize( gray, small_img, CV_INTER_LINEAR );cvShowImage("gray",small_img);    cvEqualizeHist( small_img, small_img );cvShowImage("face",small_img);    cvClearMemStorage( storage );     if( cascade )    {        /*函数cvHaarDetectObjects检测图像中的目标，由OpenCV提供。*/        CvSeq* faces = cvHaarDetectObjects( small_img, cascade, storage, 1.1, 2, 0 ,                                            cvSize(30, 30) );        for( int i = 0; i < (faces ? faces->total : 0); i++ )        {            CvRect* r = (CvRect*)cvGetSeqElem( faces, i );            CvPoint center;            int radius;            center.x = cvRound((r->x + r->width*0.5)*scale);            center.y = cvRound((r->y + r->height*0.5)*scale);            radius = cvRound((r->width + r->height)*0.25*scale);            cvCircle( img, center, radius, colors[0], 3, 8, 0 );printf("%d",i);printf("%d",faces->total);        }    }     cvShowImage( "result", img );    cvReleaseImage( &gray );    cvReleaseImage( &small_img );}