opencv 2.4.9+vs2013 人脸识别环境搭建，眼睛，鼻子，嘴巴等 摄像头读取和显示

一 ，环境设置  

      工具： 

•       opencv2.4.9地址：https://sourceforge.net/projects/opencvlibrary/files/opencv-win/2.4.9/opencv-2.4.9.exe/download
•       VS2013自行安装

      步骤：

     1.   安装opencv2.4.9，解压，请务必记住自己解压的路径。以我自己的路径为例D:\

       

     2.  配置环境变量

         （1）系统变量 Path：添加 D:\opencv2.4.9\opencv\build\x86\vc12\bin

      （2）用户变量： 添加opencv变量值 D:\opencv2.4.9\opencv\build

           添加PATH变量（有就不需要添加，但是值需要添加）值D:\opencv2.4.9\opencv\build\x86\vc12\bin

      说明：不管你系统是32位还是64位，路径目录均选择X86，因为编译都是使用32位编译；如果选用X64，则程序运行时候会出错。

     

3.  新建visual C项目

    新建 visual C++项目，如下图所示，项目选项注意：如下图。

    

   

    

   4.  工程目录的配置（Debug）

      找到属性管理器     视图---其他窗口----属性管理器

        如果找不到，请安装下图方法找到。双击Debug|Win32打开如下窗口，

    

   设置如下：（下图红框项为设置项）

   1、包含目录：（VC++目录）

        D:\opencv2.4.9\opencv\build\include

        D:\opencv2.4.9\opencv\build\include\opencv

        D:\opencv2.4.9\opencv\build\include\opencv2

  2、库目录：（VC++目录）D:\opencv2.4.9\opencv\build\x86\vc12\lib

  3、连接器->输入->附加依赖项：

  

opencv_ml249d.lib

opencv_calib3d249d.lib

opencv_contrib249d.lib

opencv_core249d.lib

opencv_features2d249d.lib

opencv_flann249d.lib

opencv_gpu249d.lib

opencv_highgui249d.lib

opencv_imgproc249d.lib

opencv_legacy249d.lib

opencv_objdetect249d.lib

opencv_ts249d.lib

opencv_video249d.lib

opencv_nonfree249d.lib

opencv_ocl249d.lib

opencv_photo249d.lib

opencv_stitching249d.lib

opencv_superres249d.lib

opencv_videostab249d.lib

其实以上都是D:\Program Files\opencv\build\x86\vc12\lib下所有的lib文件，你会发现，有的后面带上d，有的没有d，这是因为Debug的就有d，Release则没有d。

 

5.  工程目录的配置（Release）

    其他与Debug一样，只是连接器->输入->附加依赖项不一样，设置如下：

opencv_objdetect249.lib

opencv_ts249.lib

opencv_video249.lib

opencv_nonfree249.lib

opencv_ocl249.lib

opencv_photo249.lib

opencv_stitching249.lib

opencv_superres249.lib

opencv_videostab249.lib

opencv_calib3d249.lib

opencv_contrib249.lib

opencv_core249.lib

opencv_features2d249.lib

opencv_flann249.lib

opencv_gpu249.lib

opencv_highgui249.lib

opencv_imgproc249.lib

opencv_legacy249.lib

opencv_ml249.lib

6.  测试代码

   解决方案资源管理器-----源文件-----右键-----添加---新建项---写代码

二 人脸识别，

   以下包含三个部分： 摄像头读取和显示，人脸识别单张图像，人脸识别视频形式

1.   读取摄像头和显示：

int main( int argc, char** argv ) {       //int i=0;      cvNamedWindow( "Example2_9", CV_WINDOW_AUTOSIZE );      CvCapture* capture;      capture = cvCreateCameraCapture(0);      assert( capture != NULL );      IplImage* frame;      //frame = cvQueryFrame( capture );  //先读一次规避掉第一帧      while(1) {          frame = cvQueryFrame( capture );          if( !frame ) break;         //如果程序不能读取摄像头，那么将此句删除或加个判断即采用注释掉的i语句又或者在while前读一次          //if( !frame&i>0 ) break;          //if(i>0)          cvShowImage( "Example2_9", frame );          char c = cvWaitKey(10);          if( c == 27 ) break;          //i++;      }      cvReleaseCapture( &capture );      cvDestroyWindow( "Example2_9" );      return 0;  }  //在运行书上第2章练习2运动跟踪时，删掉掉if语句不能运行,加个判断可以  

2.  人脸识别

OpenCV_人脸检测

利用OpenCV自带的人脸识别库haarcascade_frontalface_alt.xml进行人脸识别测试

Opencv自带了几个训练好的分类器，我们可以直接调用测试，分类器的目录在opencv的安装目录opencv246\opencv\sources\data\haarcascades\文件夹下

关于人脸检测有四个分类器

这里我们采用haarcascade_frontalface_alt.xml进行人脸识别测试。

调用代码如下：

#include "cv.h"  #include "highgui.h"      #include <stdio.h>  #include <stdlib.h>  #include <string.h>  #include <assert.h>  #include <math.h>  #include <float.h>  #include <limits.h>  #include <time.h>  #include <ctype.h>  using namespace std;      static CvMemStorage* storage = 0;  static CvHaarClassifierCascade* cascade = 0;      void detect_and_draw( IplImage* image );      const char* cascade_name ="D:/opencv2.4.9/opencv/sources/data/haarcascades/haarcascade_frontalface_alt.xml"; //opencv自带人脸识别训练结果  /* "haarcascade_profileface.xml";*/      int main()  {     CvCapture* capture = 0;         cascade = (CvHaarClassifierCascade*)cvLoad( cascade_name, 0, 0, 0 );//加载opencv自带人脸识别训练结果        if( !cascade )    {       fprintf( stderr, "ERROR: Could not load classifier cascade/n" );       //fprintf( stderr,       //"Usage: facedetect --cascade=/"<cascade_path>"/[filename|camera_index]/n" );       return -1;     }     storage = cvCreateMemStorage(0);       cvNamedWindow( "result", 1 );       const char* filename = "people.jpg";     IplImage* image = cvLoadImage(filename ); //加载图像     if( image )   {   detect_and_draw( image );   cvWaitKey(0);   cvReleaseImage( &image );   }       cvDestroyWindow("result");   cvWaitKey(0);   return 0;  }      void detect_and_draw( IplImage* img ) //检测人脸并画出区域  {   static CvScalar colors[] =   //随机生成颜色序列   {   {{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 );   int i;       cvCvtColor( img, gray, CV_BGR2GRAY );//彩色图转化为灰度图   cvResize( gray, small_img, CV_INTER_LINEAR ); //利用线性插值算法归一化图像   cvEqualizeHist( small_img, small_img ); //直方图均衡化   cvClearMemStorage( storage );       if( cascade )   {   double t = (double)cvGetTickCount();    CvSeq* faces = cvHaarDetectObjects( small_img, cascade, storage,   1.1, 2, 0/*CV_HAAR_DO_CANNY_PRUNING*/,   cvSize(30, 30) );   t = (double)cvGetTickCount() - t;    printf( "detection time = %gms/n", t/((double)cvGetTickFrequency()*1000.) ); //统计人脸定位所用时间   for( 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); //圆心   center.y = cvRound((r->y + r->height*0.5)*scale);   radius = cvRound((r->width + r->height)*0.25*scale); //半径   cvCircle( img, center, radius, colors[i%8], 3, 8, 0 ); //用圆形圈出人脸区域   }   }         cvShowImage( "result", img );     cvReleaseImage( &gray );    cvReleaseImage( &small_img );  }   

   2.  人脸识别 ———视频

#include "cv.h"  #include "highgui.h"  #include <stdio.h>  #include <stdlib.h>  #include <string.h>  #include <assert.h>  #include <math.h>  #include <float.h>  #include <limits.h>  #include <time.h>  #include <ctype.h>  using namespace std;static CvMemStorage* storage = 0;static CvHaarClassifierCascade* cascade = 0;void detect_and_draw(IplImage* image);const char* cascade_name = "D:/opencv2.4.9/opencv/sources/data/haarcascades/haarcascade_frontalface_alt.xml"; //opencv×Ô´øÈËÁ³Ê¶±ðѵÁ·½á¹û  /* "haarcascade_profileface.xml";*/int main(){CvCapture* capture;capture = cvCreateCameraCapture(0);cvNamedWindow("face", 1);cascade = (CvHaarClassifierCascade*)cvLoad(cascade_name, 0, 0, 0);//¼ÓÔØopencv×Ô´øÈËÁ³Ê¶±ðѵÁ·½á¹û  if (!cascade){fprintf(stderr, "ERROR: Could not load classifier cascade/n");//fprintf( stderr,  //"Usage: facedetect --cascade=/"<cascade_path>"/[filename|camera_index]/n" );  return -1;}storage = cvCreateMemStorage(0);assert(capture != NULL);IplImage* frame;frame = cvQueryFrame( capture );  //ÏȶÁÒ»´Î¹æ±ÜµôµÚÒ»Ö¡  while (1) {frame = cvQueryFrame(capture);detect_and_draw(frame);//if (!frame) break;         //Èç¹û³ÌÐò²»ÄܶÁÈ¡ÉãÏñÍ·£¬ÄÇô½«´Ë¾äɾ³ý»ò¼Ó¸öÅжϼ´²ÉÓÃ×¢Ê͵ôµÄiÓï¾äÓÖ»òÕßÔÚwhileÇ°¶ÁÒ»´Î  //if( !frame&i>0 ) break;  //if(i>0)  cvShowImage("face", frame);char c = cvWaitKey(10);if (c == 27) break;//i++;  }cvReleaseCapture(&capture);cvDestroyWindow("face");cvWaitKey(0);return 0;}void detect_and_draw(IplImage* img) //¼ì²âÈËÁ³²¢»­³öÇøÓò  {static CvScalar colors[] =   //Ëæ»úÉú³ÉÑÕÉ«ÐòÁÐ  {{ { 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);int i;cvCvtColor(img, gray, CV_BGR2GRAY);//²Êɫͼת»¯Îª»Ò¶Èͼ  cvResize(gray, small_img, CV_INTER_LINEAR); //ÀûÓÃÏßÐÔ²åÖµËã·¨¹éÒ»»¯Í¼Ïñ  cvEqualizeHist(small_img, small_img); //Ö±·½Í¼¾ùºâ»¯  cvClearMemStorage(storage);if (cascade){double t = (double)cvGetTickCount();CvSeq* faces = cvHaarDetectObjects(small_img, cascade, storage,1.1, 2, 0/*CV_HAAR_DO_CANNY_PRUNING*/,cvSize(30, 30));t = (double)cvGetTickCount() - t;printf("detection time = %gms/n", t / ((double)cvGetTickFrequency()*1000.)); //ͳ¼ÆÈËÁ³¶¨Î»ËùÓÃʱ¼ä  for (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); //Ô²ÐÄ  center.y = cvRound((r->y + r->height*0.5)*scale);radius = cvRound((r->width + r->height)*0.25*scale); //°ë¾¶  cvCircle(img, center, radius, colors[i % 8], 3, 8, 0); //ÓÃÔ²ÐÎȦ³öÈËÁ³ÇøÓò  }}//cvShowImage("result", img);cvReleaseImage(&gray);cvReleaseImage(&small_img);}

注释：

const char* cascade_name="haarcascade_frontalface_alt2.xml";//分类器的名称
const char* cascade_name1="haarcascade_eye_tree_eyeglasses.xml";//分类器的名称
const char* cascade_name2="haarcascade_frontalface_alt_tree.xml";//分类器的名称
const char* cascade_name3="haarcascade_mcs_mouth.xml";//分类器的名称
const char* cascade_name4="haarcascade_mcs_nose.xml";//分类器的名称

这是不同的分类器，你可以在你安装的OpenCV中找到。如D:\Program Files\OpenCV2.0\vs2008\data\haarcascades

不同分类器能够帮助你识别不同的部分，如眼睛，鼻子和嘴，更多的需要自己去探索吧。

注释：

  把圆形转换成矩形：

pt1.x = r->x*scale; 
pt2.x = (r->x+r->width)*scale; 
pt1.y = r->y*scale; 
pt2.y = (r->y+r->height)*scale; 
cvRectangle( img, pt1, pt2, CV_RGB(255,0,0), 3, 8, 0 ); 

pt1 : 矩形左上角

pt2:  矩形右下角

只需把  

cvCircle(img, center, radius, colors[i % 8], 3, 8, 0); //用圆形圈出人脸区域  

换成

cvRectangle(img, cvPoint(r->x*scale, r->y*scale), cvPoint((r->x + r->width)*scale, (r->x + r->height)*scale), cvScalar(0, 0, 255), 2, 8, 0);