VS2010＋Opencv+MFC读取图像和视频显示在Picture控件

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1.新建MFC对话框应用程序。

其余选项默认，单击完成，创建出对话框应用程序。删掉原来自带的一些控件，添加picture控件和两个按钮。

2.由于以后的代码会用到CvvImage类，而opencv2.3以后就去掉了对它的支持，这里先介绍添加CvvImage支持的方法，直接能用的可以略过这一步。

如下图添加相应的文件：

这里附上两个文件的源码方便使用。

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#pragma once #ifndef CVVIMAGE_CLASS_DEF #define CVVIMAGE_CLASS_DEF #include "opencv.hpp" 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

 来自CODE的代码片

CvvImage.h

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#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 (); 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 ; } 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 ) ); }

 来自CODE的代码片

CvvImage.cpp

在需要引用该类的地方添加如下引用：

3.在Picture控件中显示图片

如图所示修改控件ID，并删除按钮已存在的响应代码。双击显示图片添加以下代码：

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void CopencvtestDlg :: OnBnClickedCancel () { // TODO: 在此添加控件通知处理程序代码 CDC * pDC = GetDlgItem ( IDC_STATIC ) -> GetDC (); //根据ID获得窗口指针再获取与该窗口关联的上下文指针 HDC hdc = pDC -> GetSafeHdc (); // 获取设备上下文句柄 CRect rect ; // 矩形类 GetDlgItem ( IDC_STATIC ) -> GetClientRect ( & rect ); //获取box1客户区 CvvImage cimg ; IplImage * src ; // 定义IplImage指针变量src src = cvLoadImage ( "D: \\ me.bmp" , - 1 ); // 将src指向当前工程文件目录下的图像me.bmp cimg . CopyOf ( src , src -> nChannels ); cimg . DrawToHDC ( hdc , & rect ); //输出图像 ReleaseDC ( pDC ); cimg . Destroy (); //销毁 }

 来自CODE的代码片

showimage.cpp

4.播放视频

双击播放视频按钮，添加如下代码：

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void CopencvtestDlg :: OnBnClickedOk () { // TODO: 在此添加控件通知处理程序代码 //IplImage *src; // 定义IplImage指针变量src // src = cvLoadImage("D:\\me.bmp",-1); // 将src指向当前工程文件目录下的图像me.bmp // cvNamedWindow("me",0);//定义一个窗口名为lena的显示窗口 // cvShowImage("me",src);//在lena窗口中，显示src指针所指向的图像 // cvWaitKey(0);//无限等待，即图像总显示 // cvDestroyWindow("me");//销毁窗口lena // cvReleaseImage(&src);//释放IplImage指针src CDC * pDC = GetDlgItem ( IDC_STATIC ) -> GetDC (); //根据ID获得窗口指针再获取与该窗口关联的上下文指针 HDC hdc = pDC -> GetSafeHdc (); // 获取设备上下文句柄 CRect rect ; // 矩形类 GetDlgItem ( IDC_STATIC ) -> GetClientRect ( & rect ); //获取box1客户区 CvCapture * capture = cvCreateFileCapture ( "D: \\ tree.avi" ); //读取视频 if ( capture == NULL ) { printf ( "NO capture" ); //读取不成功，则标识 //return 1; }; double fps = cvGetCaptureProperty ( capture , CV_CAP_PROP_FPS ); //读取视频的帧率 int vfps = 1000 / fps ; //计算每帧播放的时间 printf ( "%5.1f \t %5d \n " , fps , vfps ); double frames = cvGetCaptureProperty ( capture , CV_CAP_PROP_FRAME_COUNT ); //读取视频中有多少帧 printf ( "frames is %f \n " , frames ); //cvNamedWindow("example",CV_WINDOW_AUTOSIZE); //定义窗口 IplImage * frame ; CvvImage cimg ; while ( 1 ){ frame = cvQueryFrame ( capture ); //抓取帧 cimg . CopyOf ( frame , frame -> nChannels ); cimg . DrawToHDC ( hdc , & rect ); float ratio = cvGetCaptureProperty ( capture , CV_CAP_PROP_POS_AVI_RATIO ); //读取该帧在视频中的相对位置 printf ( "%f \n " , ratio ); if ( ! frame ) break ; //cvShowImage("IDC_STATIC",frame); //显示 char c = cvWaitKey ( vfps ); if ( c == 27 ) break ; } ReleaseDC ( pDC ); cvReleaseCapture ( & capture ); cvDestroyWindow ( "example" ); }

 来自CODE的代码片

showvideo.cpp