MFC的实现摄像头（opencv）

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程序代码：

BOOL COpencvUIDlgDlg::OnInitDialog()
{
CDialog::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)
{
  CString strAboutMenu;
  strAboutMenu.LoadString(IDS_ABOUTBOX);
  if (!strAboutMenu.IsEmpty())
  {
   pSysMenu->AppendMenu(MF_SEPARATOR);
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
  }
}

// Set the icon for this dialog.  The framework does this automatically
//  when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE);   // Set big icon
SetIcon(m_hIcon, FALSE);  // Set small icon

// TODO: Add extra initialization here

pwnd = GetDlgItem(IDC_SHOWPIC);
//pwnd->MoveWindow(35,30,387,318);
pDC =pwnd->GetDC();
//pDC =GetDC();
hDC= pDC->GetSafeHdc();
pwnd->GetClientRect(&rect);

CDC MemDC;
CBitmap m_Bitmap1;
m_Bitmap1.LoadBitmap(IDB_BLANK);
MemDC.CreateCompatibleDC(NULL);
MemDC.SelectObject(&m_Bitmap1);

//CClientDC dc(this);
pDC->StretchBlt(rect.left,rect.top,rect.Width(),rect.Height(),&MemDC,0,0,48,48,SRCCOPY);

m_Bitmap1.DeleteObject();
MemDC.DeleteDC();

b_flagProcess=0;
Invalidate();

SetDlgItemText(IDC_EDIT_TIME,"无");
SetDlgItemText(IDC_EDIT_FRAME_WIDTH,"无");
SetDlgItemText(IDC_EDIT_FRAME_HEIGHT,"无");
SetDlgItemText(IDC_EDIT_FPS,"无");
SetDlgItemText(IDC_EDIT_FOURCC,"无");
SetDlgItemText(IDC_EDIT_FRAME_COUNT,"无");

return TRUE; // return TRUE unless you set the focus to a control
}

void COpencvUIDlgDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
  CAboutDlg dlgAbout;
  dlgAbout.DoModal();
}
else
{
  CDialog::OnSysCommand(nID, lParam);
}
}

// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.

void COpencvUIDlgDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting

SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

  // Center icon in client rectangle
  int cxIcon = GetSystemMetrics(SM_CXICON);
  int cyIcon = GetSystemMetrics(SM_CYICON);
  CRect rect;
  GetClientRect(&rect);
  int x = (rect.Width() - cxIcon + 1) / 2;
  int y = (rect.Height() - cyIcon + 1) / 2;

  // Draw the icon
  dc.DrawIcon(x, y, m_hIcon);
}
else
{
  CDialog::OnPaint();
}

if (!b_flagProcess)
{
  CDC MemDC;
  CBitmap m_Bitmap1;
  m_Bitmap1.LoadBitmap(IDB_BLANK);
  MemDC.CreateCompatibleDC(NULL);
  MemDC.SelectObject(&m_Bitmap1);

  //CClientDC dc(this);
  pDC->StretchBlt(rect.left,rect.top,rect.Width(),rect.Height(),&MemDC,0,0,48,48,SRCCOPY);

  m_Bitmap1.DeleteObject();
  MemDC.DeleteDC();
}
}

// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR COpencvUIDlgDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}

void COpencvUIDlgDlg::OnTimer(UINT nIDEvent)
{
// TODO: Add your message handler code here and/or call default
// KillTimer(nIDEvent);
m_Frame=cvQueryFrame(m_Video);
// cvNamedWindow("new",1);
// cvShowImage("new",m_Frame);
m_CvvImage.CopyOf(m_Frame,1);
m_CvvImage.DrawToHDC(hDC, &rect);
//cvWaitKey(10);
b_flagProcess=1;

m_vieoProtery=cvGetCaptureProperty(m_Video,CV_CAP_PROP_POS_MSEC);
itoa(m_vieoProtery,chEdit,10);
SetDlgItemText(IDC_EDIT_TIME,chEdit);
m_vieoProtery=cvGetCaptureProperty(m_Video,CV_CAP_PROP_FRAME_WIDTH);
itoa(m_vieoProtery,chEdit,10);
SetDlgItemText(IDC_EDIT_FRAME_WIDTH,chEdit);
m_vieoProtery=cvGetCaptureProperty(m_Video,CV_CAP_PROP_FRAME_HEIGHT);
itoa(m_vieoProtery,chEdit,10);
SetDlgItemText(IDC_EDIT_FRAME_HEIGHT,chEdit);
m_vieoProtery=cvGetCaptureProperty(m_Video,CV_CAP_PROP_FPS);
itoa(m_vieoProtery,chEdit,10);
SetDlgItemText(IDC_EDIT_FPS,chEdit);
m_vieoProtery=cvGetCaptureProperty(m_Video,CV_CAP_PROP_FOURCC);
itoa(m_vieoProtery,chEdit,10);
SetDlgItemText(IDC_EDIT_FOURCC,chEdit);
m_fameCount++;
// m_vieoProtery=cvGetCaptureProperty(m_Video,CV_CAP_PROP_FRAME_COUNT);
itoa(m_fameCount,chEdit,10);
SetDlgItemText(IDC_EDIT_FRAME_COUNT,chEdit);

if (b_flagSaveMovie)
{
  if (!m_Movie)
   return;
  cvWriteFrame(m_Movie,m_Frame);
}

CDialog::OnTimer(nIDEvent);
}

void COpencvUIDlgDlg::OnOpencamera()
{
// TODO: Add your control notification handler code here

//m_Video=cvCaptureFromCAM(-1);
m_Video=cvCreateCameraCapture(-1);

if (!m_Video)
{
AfxMessageBox("无法打开摄像头");
return;
}

SetTimer(1,100,NULL);

}

void COpencvUIDlgDlg::OnClosecamera()
{
// TODO: Add your control notification handler code here
KillTimer(1);
cvReleaseCapture(&m_Video);
cvReleaseVideoWriter(&m_Movie);
b_flagProcess=0;
m_fameCount=0;
b_flagSaveMovie=0;

CDC MemDC;
CBitmap m_Bitmap1;
m_Bitmap1.LoadBitmap(IDB_BLANK);
MemDC.CreateCompatibleDC(NULL);
MemDC.SelectObject(&m_Bitmap1);
pDC->StretchBlt(rect.left,rect.top,rect.Width(),rect.Height(),&MemDC,0,0,48,48,SRCCOPY);
m_Bitmap1.DeleteObject();
MemDC.DeleteDC();

SetDlgItemText(IDC_EDIT_TIME,"无");
SetDlgItemText(IDC_EDIT_FRAME_WIDTH,"无");
SetDlgItemText(IDC_EDIT_FRAME_HEIGHT,"无");
SetDlgItemText(IDC_EDIT_FPS,"无");
SetDlgItemText(IDC_EDIT_FOURCC,"无");
SetDlgItemText(IDC_EDIT_FRAME_COUNT,"无");
}

void COpencvUIDlgDlg::OnGrabframe()
{
// TODO: Add your control notification handler code here
if (!m_Video)
return;

m_GrabFrame=cvQueryFrame(m_Video);
if (!m_GrabFrame)
return;

static char countsnap='1';
CString m_name="";
m_name=+countsnap;
m_name+=".bmp";

IplImage * m_snap=cvCreateImage(cvGetSize(m_GrabFrame),m_GrabFrame->depth,m_GrabFrame->nChannels);
cvCopy(m_GrabFrame,m_snap,NULL);

const char* pszStr = m_name.GetBuffer(m_name.GetLength());
cvSaveImage(pszStr,m_snap); //把图像写入文件

countsnap++;

}

//DEL BOOL COpencvUIDlgDlg::Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName, DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID, CCreateContext* pContext)
//DEL {
//DEL // TODO: Add your specialized code here and/or call the base class
//DEL CDC MemDC;
//DEL CBitmap m_Bitmap1;
//DEL m_Bitmap1.LoadBitmap(IDB_BLANK);
//DEL MemDC.CreateCompatibleDC(NULL);
//DEL MemDC.SelectObject(&m_Bitmap1);
//DEL
//DEL //CClientDC dc(this);
//DEL pDC->StretchBlt(rect.left,rect.top,rect.Width(),rect.Height(),&MemDC,0,0,48,48,SRCCOPY);
//DEL
//DEL m_Bitmap1.DeleteObject();
//DEL MemDC.DeleteDC();
//DEL return CDialog::Create(IDD, pParentWnd);
//DEL }

void COpencvUIDlgDlg::OnSavemovie()
{
// TODO: Add your control notification handler code here
//m_Movie=cvCreateVideoWriter("video.avi",-1,10,cvSize(352,288),1);
if (b_flagProcess)
{
  //m_Movie=cvCreateVideoWriter("video.avi",CV_FOURCC('P','I','M','1'),10,cvSize(352,288),1);
  m_Movie=cvCreateVideoWriter("video.avi",-1,10,cvSize(352,288),1);
  b_flagSaveMovie=1;
}

}

void COpencvUIDlgDlg::OnStopsavemovie()
{
// TODO: Add your control notification handler code here
cvReleaseVideoWriter(&m_Movie);
b_flagSaveMovie=0;
}

变量说明

CvvImage m_CvvImage;
CvCapture * m_Video;
IplImage* m_Frame;//用于存储一帧
IplImage* m_GrabFrame;//用于存储一帧
CRect rect;
CDC *pDC;
HDC hDC;
CWnd *pwnd;
bool b_flagProcess;
bool b_flagSaveMovie=0;
CvVideoWriter* m_Movie;
char chEdit[10];
double m_vieoProtery;
int m_fameCount=0;

变量均为全局变量

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