基于OpenCV读取摄像头实现单个人脸验证MFC程序

与上一篇博客类似，这篇博客介绍使用OpenCV实现的MFC程序，可以实现单个人脸的验证，并在图像和界面给出识别结果。效果图如下：

置信度一栏可以填写判定的阈值，默认为70。打开摄像头才能进行验证或拍照，拍照之前可以清除之前拍摄的训练图片，可以拍摄多张用于识别。其中mfc中的图像显示需要用到CvImage.cpp和CvImage.h两个文件，该代码在比较新的OpenCV内已经没有了，所以可以直接用我代码里的。

有人说代码的检测率不高，其实可以归结为两方面的原因，第一人脸检测率不高，这个可以通过嵌套检测嘴角、眼睛等来降低，或者背景、光照固定的话可以通过图像差分来解决；第二是识别方法本身的问题，如果想提高识别率，可以添加多张不同姿态、光照下的人脸作为训练的样本，如果有时间的话可以在采集图像时给出一个人脸框，引导用户对齐人脸进行采集，三星手机解除锁屏就有这么一个功能。

下面贴一下主要的代码：

VideoMFCDlg.cpp

// VideoMFCDlg.cpp : implementation file
//
 
#include "stdafx.h"
#include "VideoMFC.h"
#include "VideoMFCDlg.h"
#include "afxdialogex.h"
 
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
 
 
CvCapture* capture;
CRect rect;
CDC *pDC;
HDC hDC;
CWnd *pwnd;
CvVideoWriter* writer = 0;
IplImage *resizeRes;//存放检测到的人脸
IplImage* faceGray;//存放检测到的人脸 灰度图像
bool bool_cameOpen = false;//全局变量 标志摄像头是否打开
bool bool_picNum = false;//全局变量 标志训练图片是否为空
bool bool_detec_reco = false;//全局变量 
double dConfidence = 0;//置信度
int predictedLabel = 100000;
 
CvMemStorage* storage = 0;
CvHaarClassifierCascade* cascade = 0;
CvHaarClassifierCascade* nested_cascade = 0;
int use_nested_cascade = 0;
const char* cascade_name =
 "../data/haarcascades/haarcascade_frontalface_alt.xml";
const char* nested_cascade_name =
 "../data/haarcascade_eye_tree_eyeglasses.xml";
double scale = 1;
int num_components = 9;
double facethreshold = 9.0;
//cv::Ptr<cv::FaceRecognizer> model = cv::createFisherFaceRecognizer();
cv::Ptr<cv::FaceRecognizer> model = cv::createLBPHFaceRecognizer();//LBP的这个方法在单个人脸验证方面效果最好
//cv::Ptr<cv::FaceRecognizer> model = cv::createEigenFaceRecognizer();
vector<Mat> images;
vector<int> labels;
 
IplImage *frame, *frame_copy = 0;
IplImage *image = 0;
const char* scale_opt = "--scale="; // 分类器选项指示符号 
int scale_opt_len = (int)strlen(scale_opt);
const char* cascade_opt = "--cascade=";
int cascade_opt_len = (int)strlen(cascade_opt);
const char* nested_cascade_opt = "--nested-cascade";
int nested_cascade_opt_len = (int)strlen(nested_cascade_opt);
int i;
const char* input_name = 0;
 
// CAboutDlg dialog used for App About
CString strConfidence = "70";
CEdit* pEdtConfidence;
CString strTip = "";
CEdit* pTip;
 
class CAboutDlg : public CDialogEx
{
public:
 CAboutDlg();
 
// Dialog Data
 enum { IDD = IDD_ABOUTBOX };
 
 protected:
 virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
 
// Implementation
protected:
 DECLARE_MESSAGE_MAP()
};
 
CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD)
{
}
 
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
 CDialogEx::DoDataExchange(pDX);
}
 
BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()
 
 
// CVideoMFCDlg dialog
 
 
 
 
CVideoMFCDlg::CVideoMFCDlg(CWnd* pParent /*=NULL*/)
 : CDialogEx(CVideoMFCDlg::IDD, pParent)
{
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
 
void CVideoMFCDlg::DoDataExchange(CDataExchange* pDX)
{
 CDialogEx::DoDataExchange(pDX);
}
 
BEGIN_MESSAGE_MAP(CVideoMFCDlg, CDialogEx)
 ON_WM_SYSCOMMAND()
 ON_WM_PAINT()
 ON_WM_QUERYDRAGICON()
 ON_BN_CLICKED(IDC_BUTTON1, &CVideoMFCDlg::OnBnClickedButton1)
 ON_WM_TIMER()
 ON_BN_CLICKED(IDC_BUTTON2, &CVideoMFCDlg::OnBnClickedButton2)
 ON_WM_CLOSE()
 ON_EN_CHANGE(IDC_EdtConfidence, &CVideoMFCDlg::OnEnChangeEdtconfidence)
 ON_BN_CLICKED(IDC_Photograph, &CVideoMFCDlg::OnBnClickedPhotograph)
 ON_BN_CLICKED(IDC_Recognize, &CVideoMFCDlg::OnBnClickedRecognize)
 ON_BN_CLICKED(IDC_ClearPictures, &CVideoMFCDlg::OnBnClickedClearpictures)
END_MESSAGE_MAP()
 
 
// CVideoMFCDlg message handlers
BOOL CVideoMFCDlg::OnDestroy()
{
 cvReleaseImage( &resizeRes );
 cvReleaseImage( &faceGray );
 return TRUE; 
}
BOOL CVideoMFCDlg::OnInitDialog()
{
 CDialogEx::OnInitDialog();
 
 // Add "About..." menu item to system menu.
 
 // IDM_ABOUTBOX must be in the system command range.
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
 ASSERT(IDM_ABOUTBOX < 0xF000);
 
 CMenu* pSysMenu = GetSystemMenu(FALSE);
 if (pSysMenu != NULL)
 {
 BOOL bNameValid;
 CString strAboutMenu;
 bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
 ASSERT(bNameValid);
 if (!strAboutMenu.IsEmpty())
 {
 pSysMenu->AppendMenu(MF_SEPARATOR);
 pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
 }
 }
 
 
 // Set the icon for this dialog. The framework(%%}С%%аЁЁ4)(
Ё4(4(4(Ё4(Рб
Y}=9Q}!IM!e}M%5A1`}=9Q}%Q1%(
(
ЁС4(QСаб)4)5Ё|4)5ЁР5Ё4(э4(4(鹽锡}I5}5%95`
Y|4(鹽锡}I5}5%95`
Y|4(Q4(4)}5ЙЙ4)}4(Ё
Y}
Y}M	4(4("">v|4(">B;v/"63v|4(4(}}}4({:фn/n:YZn4)}5ЙЙ4)(Ё}х}Ё(
ффlt}фф(Рфф04((	
Ё(Ё4(}}(}С4((}}q}}(}{:фn/YZVn4)Ё}}4)(Ё4(Ё}х}Ё(
ффltРфф04(}С4((}}4)qqхqqхqp(4(brZj3ro疒j惚r'&*rokkR2