mfc结合OpenCV-2.4.7 初次尝试纯属好奇（OpenCV安装并在vs2010中配置）

          嘿嘿，我也是菜鸟一只。OpenCV也是今天第一次听一位同学说的，最近公司让我搞一个可视对讲的东西所以对视频类的东西稍有兴趣，纯属好奇心太强啊。初次使用就简单做一下笔录也算是如实交代吧。OpenCV的全称是：Open Source Computer Vision Library。OpenCV是一个基于（开源）发行的跨平台计算机视觉库，可以运行Linux、Windows和Mac OS操作系统上。它轻量级而且高效——由一系列 C 函数和少量 C++ 类构成，同时提供了Python、Ruby、MATLAB等语言的接口，实现了图像处理和计算机视觉方面的很多通用算法。我看OpenCV-2.4.7版本人家在android上面也能用，接下来我也去尝试一回。既然是MFC那么你就要有开发工具了，现在大概用vs系列的多一些吧，VC6.0就不说了。有了工具之后咱就得有OpenCV，OpenCV的使用就得经历以下步骤了：
一、下载OpenCV，下载地址为http://sourceforge.net/projects/opencvlibrary/files/opencv-win/2.4.7/OpenCV-2.4.7.exe/download
二、下载完成之后运行，实际上它就开始自解压了。

三、为OpenCV配置环境变量，经常配过的人有经验就是配置bin文件夹，C:\opencv\build\x86\vc10\bin（在刚才解压的目录找到你自己对应的平台）这个我就不说了吧。
四、在vs中配置，新建一个mfc项目。

（1）打开VS菜单栏—>视图—>属性管理器，双击Micrsof.CPP.Win32.user.

（2）在属性页—>通用属性—>VC++目录—>包含目录下加入：

                   C:\Program Files\opencv2.4.7\build\include;

　　　　　　   C:\Program Files\opencv2.4.7\build\include\opencv;

　　　　　　   C:\Program Files\opencv2.4.7\build\include\opencv2;

（3）在属性页—>通用属性—>VC++目录—>库目录下加入C:\opencv\build\x86\vc10\lib（看对你自己的目录）。

（4）在属性页->链接器->输入->附加依赖项 里面加入

opencv_calib3d247d.lib
opencv_contrib247d.lib
opencv_core247d.lib
opencv_features2d247d.lib
opencv_flann247d.lib
opencv_gpu247d.lib
opencv_highgui247d.lib
opencv_imgproc247d.lib
opencv_legacy247d.lib
opencv_ml247d.lib
opencv_objdetect247d.lib
opencv_ts247d.lib
opencv_video247d.lib

然后应用确定，配置到此算是完成了。

在头文件中新建CvvImage.h代码为

#pragma once
#ifndef CVVIMAGE_CLASS_DEF
#define CVVIMAGE_CLASS_DEF
#include
/* CvvImage class definition */
class  CvvImage
{
public:
	CvvImage();
	virtual ~CvvImage();
	virtual bool  Create( int width, int height, int bits_per_pixel, int image_origin = 0 );
	virtual bool  Load( const char* filename, int desired_color = 1 );
	virtual bool  LoadRect( const char* filename,
    int desired_color, CvRect r );
#if defined WIN32 || defined _WIN32
	virtual bool  LoadRect( const char* filename,
    int desired_color, RECT r )
   {
      return LoadRect( filename, desired_color,
         cvRect( r.left, r.top, r.right - r.left, r.bottom - r.top ));
   }
#endif
   virtual bool  Save( const char* filename );
   virtual void  CopyOf( CvvImage& image, int desired_color = -1 );
   virtual void  CopyOf( IplImage* img, int desired_color = -1 );
   IplImage* GetImage() { return m_img; };
   virtual void  Destroy(void);
   int Width() { return !m_img ? 0 : !m_img->roi ? m_img->width : m_img->roi->width; };
   int Height() { return !m_img ? 0 : !m_img->roi ? m_img->height : m_img->roi->height;};
   int Bpp() { return m_img ? (m_img->depth & 255)*m_img->nChannels : 0; };
   virtual void  Fill( int color );
   virtual void  Show( const char* window );

#if defined WIN32 || defined _WIN32
   virtual void  Show( HDC dc, int x, int y, int width, int height,
   int from_x = 0, int from_y = 0 );
   virtual void  DrawToHDC( HDC hDCDst, RECT* pDstRect );
#endif
protected:
   IplImage*  m_img;
};
typedef CvvImage CImage;
#endif

CvvImage.h的实现为：

#include "StdAfx.h"
#include "CvvImage.h"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CV_INLINE RECT NormalizeRect( RECT r );
CV_INLINE RECT NormalizeRect( RECT r )
{
   int t;
   if( r.left > r.right )
   {
      t = r.left;
      r.left = r.right;
      r.right = t;
   }
   if( r.top > r.bottom )
   {
      t = r.top;
      r.top = r.bottom;
      r.bottom = t;
   }

   return r;
}
CV_INLINE CvRect RectToCvRect( RECT sr );
CV_INLINE CvRect RectToCvRect( RECT sr )
{
   sr = NormalizeRect( sr );
   return cvRect( sr.left, sr.top, sr.right - sr.left, sr.bottom - sr.top );
}
CV_INLINE RECT CvRectToRect( CvRect sr );
CV_INLINE RECT CvRectToRect( CvRect sr )
{
   RECT dr;
   dr.left = sr.x;
   dr.top = sr.y;
   dr.right = sr.x + sr.width;
   dr.bottom = sr.y + sr.height;

   return dr;
}
CV_INLINE IplROI RectToROI( RECT r );
CV_INLINE IplROI RectToROI( RECT r )
{
   IplROI roi;
   r = NormalizeRect( r );
   roi.xOffset = r.left;
   roi.yOffset = r.top;
   roi.width = r.right - r.left;
   roi.height = r.bottom - r.top;
   roi.coi = 0;

   return roi;
}
void  FillBitmapInfo( BITMAPINFO* bmi, int width, int height, int bpp, int origin )
{
   assert( bmi && width >= 0 && height >= 0 && (bpp == 8 || bpp == 24 || bpp == 32));

   BITMAPINFOHEADER* bmih = &(bmi->bmiHeader);

   memset( bmih, 0, sizeof(*bmih));
   bmih->biSize = sizeof(BITMAPINFOHEADER);
   bmih->biWidth = width;
   bmih->biHeight = origin ? abs(height) : -abs(height);
   bmih->biPlanes = 1;
   bmih->biBitCount = (unsigned short)bpp;
   bmih->biCompression = BI_RGB;
   if( bpp == 8 )
   {
      RGBQUAD* palette = bmi->bmiColors;
      int i;
      for( i = 0; i < 256; i++ )
      {
         palette[i].rgbBlue = palette[i].rgbGreen = palette[i].rgbRed = (BYTE)i;
         palette[i].rgbReserved = 0;
      }
   }
}
CvvImage::CvvImage()
{
   m_img = 0;
}
void CvvImage::Destroy()
{
   cvReleaseImage( &m_img );
}
CvvImage::~CvvImage()
{
   Destroy();
}
bool  CvvImage::Create( int w, int h, int bpp, int origin )
{
   const unsigned max_img_size = 10000;

   if( (bpp != 8 && bpp != 24 && bpp != 32) ||
      (unsigned)w >=  max_img_size || (unsigned)h >= max_img_size ||
      (origin != IPL_ORIGIN_TL && origin != IPL_ORIGIN_BL))
   {
      assert(0); // most probably, it is a programming error
      return false;
   }
   if( !m_img || Bpp() != bpp || m_img->width != w || m_img->height != h )
   {
      if( m_img && m_img->nSize == sizeof(IplImage))
         Destroy();
      /* prepare IPL header */
      m_img = cvCreateImage( cvSize( w, h ), IPL_DEPTH_8U, bpp/8 );
   }
   if( m_img )
      m_img->origin = origin == 0 ? IPL_ORIGIN_TL : IPL_ORIGIN_BL;
   return m_img != 0;
}
void  CvvImage::CopyOf( CvvImage& image, int desired_color )
{
   IplImage* img = image.GetImage();
   if( img )
   {
      CopyOf( img, desired_color );
   }
}
#define HG_IS_IMAGE(img)                                                  \
   ((img) != 0 && ((const IplImage*)(img))->nSize == sizeof(IplImage) && \
   ((IplImage*)img)->imageData != 0)
void  CvvImage::CopyOf( IplImage* img, int desired_color )
{
   if( HG_IS_IMAGE(img) )
   {
      int color = desired_color;
      CvSize size = cvGetSize( img ); 
      if( color < 0 )
         color = img->nChannels > 1;
      if( Create( size.width, size.height,
         (!color ? 1 : img->nChannels > 1 ? img->nChannels : 3)*8,
         img->origin ))
      {
         cvConvertImage( img, m_img, 0 );
      }
   }
}
bool  CvvImage::Load( const char* filename, int desired_color )
{
   IplImage* img = cvLoadImage( filename, desired_color );
   if( !img )
      return false;

   CopyOf( img, desired_color );
   cvReleaseImage( &img );

   return true;
}
bool  CvvImage::LoadRect( const char* filename,
                   int desired_color, CvRect r )
{
   if( r.width < 0 || r.height < 0 ) return false;

   IplImage* img = cvLoadImage( filename, desired_color );
   if( !img )
      return false;
   if( r.width == 0 || r.height == 0 )
   {
      r.width = img->width;
      r.height = img->height;
      r.x = r.y = 0;
   }
   if( r.x > img->width || r.y > img->height ||
      r.x + r.width < 0 || r.y + r.height < 0 )
   {
      cvReleaseImage( &img );
      return false;
   }
   /* truncate r to source image */
   if( r.x < 0 )
   {
      r.width += r.x;
      r.x = 0;
   }
   if( r.y < 0 )
   {
      r.height += r.y;
      r.y = 0;
   }
   if( r.x + r.width > img->width )
      r.width = img->width - r.x;

   if( r.y + r.height > img->height )
      r.height = img->height - r.y;
   cvSetImageROI( img, r );
   CopyOf( img, desired_color );
   cvReleaseImage( &img );
   return true;
}
bool  CvvImage::Save( const char* filename )
{
   if( !m_img )
      return false;
   cvSaveImage( filename, m_img );
   return true;
}
void  CvvImage::Show( const char* window )
{
   if( m_img )
      cvShowImage( window, m_img );
}
void  CvvImage::Show( HDC dc, int x, int y, int w, int h, int from_x, int from_y )
{
   if( m_img && m_img->depth == IPL_DEPTH_8U )
   {
      uchar buffer[sizeof(BITMAPINFOHEADER) + 1024];
      BITMAPINFO* bmi = (BITMAPINFO*)buffer;
      int bmp_w = m_img->width, bmp_h = m_img->height;
      FillBitmapInfo( bmi, bmp_w, bmp_h, Bpp(), m_img->origin );
      from_x = MIN( MAX( from_x, 0 ), bmp_w - 1 );
      from_y = MIN( MAX( from_y, 0 ), bmp_h - 1 );
      int sw = MAX( MIN( bmp_w - from_x, w ), 0 );
      int sh = MAX( MIN( bmp_h - from_y, h ), 0 );
      SetDIBitsToDevice(
         dc, x, y, sw, sh, from_x, from_y, from_y, sh,
         m_img->imageData + from_y*m_img->widthStep,
         bmi, DIB_RGB_COLORS );
   }
}
void  CvvImage::DrawToHDC( HDC hDCDst, RECT* pDstRect ) 
{
   if( pDstRect && m_img && m_img->depth == IPL_DEPTH_8U && m_img->imageData )
   {
      uchar buffer[sizeof(BITMAPINFOHEADER) + 1024];
      BITMAPINFO* bmi = (BITMAPINFO*)buffer;
      int bmp_w = m_img->width, bmp_h = m_img->height;
      CvRect roi = cvGetImageROI( m_img );
      CvRect dst = RectToCvRect( *pDstRect );
      if( roi.width == dst.width && roi.height == dst.height )
      {
         Show( hDCDst, dst.x, dst.y, dst.width, dst.height, roi.x, roi.y );
         return;
      }
      if( roi.width > dst.width )
      {
         SetStretchBltMode(
            hDCDst,           // handle to device context
            HALFTONE );
      }
      else
      {
         SetStretchBltMode(
            hDCDst,           // handle to device context
            COLORONCOLOR );
      }
      FillBitmapInfo( bmi, bmp_w, bmp_h, Bpp(), m_img->origin );
      ::StretchDIBits(
         hDCDst,
         dst.x, dst.y, dst.width, dst.height,
         roi.x, roi.y, roi.width, roi.height,
         m_img->imageData, bmi, DIB_RGB_COLORS, SRCCOPY );
   }
}
void  CvvImage::Fill( int color )
{
   cvSet( m_img, cvScalar(color&255,(color>>8)&255,(color>>16)&255,(color>>24)&255) );
}

在窗体cpp文件中添加引用

#include"CvvImage.h"
#include

申明全局变量

CvCapture* capture;  
CRect rect;  
CDC *pDC;  
HDC hDC;  
CWnd *pwnd; 

在OnInitDialog()方法中的// TODO: 在此添加额外的初始化代码后添加代码

	pwnd = GetDlgItem(IDC_STATIC);   
        	pDC =pwnd->GetDC();   
        	hDC= pDC->GetSafeHdc();  
	pwnd->GetClientRect(&rect);  

双击打开按钮添加以下代码

    if(!capture)  
    {  
        capture = cvCaptureFromCAM(0);   
    }  
    if (!capture)  
    {  
        AfxMessageBox("无法打开摄像头");  
        return;  
    }  
    IplImage* m_Frame;  
    m_Frame=cvQueryFrame(capture);  
    CvvImage m_CvvImage;  
    m_CvvImage.CopyOf(m_Frame,1);     
    if (true)  
    {  
        m_CvvImage.DrawToHDC(hDC, &rect);  
 
    }  
    // 设置计时器,每10ms触发一次事件   
    SetTimer(1,10,NULL); 

双击关闭按钮添加以下代码

cvReleaseCapture(&capture);

右键主窗体选择类向导

搜索信息WM_TIMER双击之后会在函数名称中出现OnTimer然后编辑代码，添加以下代码

    IplImage* m_Frame;  
    m_Frame=cvQueryFrame(capture);  
    CvvImage m_CvvImage;  
    m_CvvImage.CopyOf(m_Frame,1);     
    if (true)  
    {  
        m_CvvImage.DrawToHDC(hDC, &rect); 
    } 
	CDialogEx::OnTimer(nIDEvent);

到此完成本次测试。我加了一个抓拍的功能但是有点儿小问题，我会在下篇中继续完善

运行效果为以下

项目源码可以在这里下载。http://download.csdn.net/detail/liu1164316159/6715757