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人脸位置识别
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haar classifier cascade是opencv下自帶的人臉檢測的級聯分類器，支持haar特征，新版本的CascadeClassifier好像支持LBP特征，沒試過。
HaarDetect.h
[cpp]?view plaincopy print?
#ifndef?HAARDETECT_H?? #define?HAARDETECT_H?? #include?<opencv2\highgui\highgui.hpp>?? #include?<opencv2\imgproc\imgproc.hpp>?? #include?<opencv2\objdetect\objdetect.hpp>?? using?namespace?std;?? using?namespace?cv;?? ?? CvHaarClassifierCascade*?Load_Haar_Cascade();?? ?? void?detectFace(IplImage*?frame,CvHaarClassifierCascade?*faceCascade,CvRect?*faceRect,int?&count);?? ?? #endif??
HaarDetect.cpp
[cpp]?view plaincopy print?
#include?"HaarDetect.h"?? #include?<iostream>?? #include?<opencv2/opencv.hpp>?? using?namespace?std;?? CvHaarClassifierCascade*?Load_Haar_Cascade()?? {?? ????CvHaarClassifierCascade*?faceCascade?=?NULL;?? ????const?char?*faceCascadeFilename?=?"D:\\軟件\\opencv\\sources\\data\\cascades\\haarcascade_frontalface_alt.xml";?? ????faceCascade?=?(CvHaarClassifierCascade*)cvLoad(faceCascadeFilename,0,0,0);?? ????if(faceCascade==NULL)?? ????{?? ????????cout<<"error?in?Load_Haar_Cascade:faceCascade?is?NULL"<<endl;?? ????}?? ????return?faceCascade;?? }?? void?detectFace(IplImage*?frame,CvHaarClassifierCascade?*faceCascade,CvRect?*faceRect,int?&count)?? {?? ?????? ????const?int?flag?=?CV_HAAR_DO_CANNY_PRUNING;?? ????CvSeq?*detectedFaces;?? ????CvMemStorage*?storage;?? ????const?double?scale_factore?=?1.1f;?? ????storage?=?cvCreateMemStorage(0);?? ????cvClearMemStorage(storage);?? ????if(faceCascade==NULL)?? ????{?? ????????cout<<"error?in?detectFace:faceCascade?is?NULL!"<<endl;?? ????????exit(1);?? ????}?? ????IplImage*?grayFrame?=?NULL;?? ????grayFrame?=?cvCreateImage(cvGetSize(frame),IPL_DEPTH_8U,1);?? ????cvCvtColor(frame,grayFrame,CV_RGB2GRAY);?? ????detectedFaces?=?cvHaarDetectObjects(grayFrame,faceCascade,storage,scale_factore,3,flag,cvSize(20,20));?? ????count?=?detectedFaces->total;?? ????if(detectedFaces==NULL)?? ????{?? ????????cout<<"error?in?detectFace:detectedFaces?is?NULL"<<endl;?? ????}?? ????for(int?i=0;i<(detectedFaces->total);i++)?? ????{?? ????????faceRect[i]?=?*(CvRect?*)cvGetSeqElem(detectedFaces,i);?? ????}?? ????if(faceRect?==?NULL)?? ????{?? ????????cout<<"error?in?detectFace:faceRect?is?NULL!"<<endl;?? ????}?? ????cvReleaseMemStorage(&storage);?? ????cvReleaseImage(&grayFrame);?? }??
main.cpp
[cpp]?view plaincopy print?
#include?<iostream>?? #include?<windows.h>?? ?? #include?<opencv2\highgui\highgui.hpp>?? #include?<opencv2\imgproc\imgproc.hpp>?? #include?<opencv2\objdetect\objdetect.hpp>?? #include?"HaarDetect.h"?? using?namespace?std;?? using?namespace?cv;?? ?? int?main()?? {?? ????CvCapture?*camera;?? ????CvHaarClassifierCascade*?faceCascade?=?NULL;?? ????CvRect?faceRect[30];?? ????int?faceCount;?? ????faceCascade?=?Load_Haar_Cascade();?? ????if(!faceCascade)?? ????????return?0;?? ????camera?=?cvCreateCameraCapture(0);?? ????if(camera==NULL)?? ????{?? ????????cout<<"camera?is?NULL"<<endl;?? ????????return?0;?? ????}?? ????IplImage?*frame;?? ????? ? ?? ????Sleep(5000);?????? ????while(true)?? ????{?? ?????????? ????????faceCount?=?0;?? ????????frame?=?cvQueryFrame(camera);?? ????????if(frame==NULL)?? ????????{?? ????????????cout<<"frame?is?NULL"<<endl;?? ????????????break;?? ????????}?? ????????detectFace(frame,faceCascade,faceRect,faceCount);?? ?????????? ?????????? ?????????? ?????????? ????????for(int?i=0;i?<?faceCount;i++)?? ????????{?? ????????????cvRectangle(frame,cvPoint(faceRect[i].x,faceRect[i].y),cvPoint(faceRect[i].x+faceRect[i].width-1,faceRect[i].y+faceRect[i].height-1),?CV_RGB(0,255,0),?1,?8,?0);?? ????????}?? ????????cvNamedWindow("Camera",CV_WINDOW_AUTOSIZE);?? ????????cvShowImage("Camera",frame);?? ????????cvWaitKey(10);?? ????}?? ????destroyAllWindows();?? ????cvReleaseCapture(&camera);?? ????return?0;?? } ?
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