在MFC的View窗口中显示IplImage之二

续。

如果有CvvImage类最好就用这个类

//IplImage* imgSrc;//HDC hDC;//CRect rect;CvvImage imgShow;imgShow.CopyOf(imgSrc,imgSrc->nChannels);imgShow.DrawToHDC(hDC,rect);

在OpenCV高版本（最近好像有2.4Beta2版本了）如2.3.1没有CvvImage类，我们可以自己添加这个类到自己的工程中。
找到他们的头文件和实现文件。因为我已另外经安装了OpenCV1.0，找到
..\..\\otherlibs\highgui\image.cpp文件，这个就是实现文件了，头文件也很容易，自己写也可以

首先是头文件。

/////////////////////////////////////////////////////////////////////////////CvvImage.h//#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 _WIN32virtual 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 ));}#endifvirtual 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 _WIN32virtual 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 );virtual void DrawToHDC( HDC hDCDst, CvRect pDstRect ); //我自己添加的，重载函数#endif

然后是实现文件

/////////////////////////////////////////////////////////////////////////////////////////////////////CvvImage.cpp#include "StdAfx.h"  //注意了！根据你自己的工程来判断是否添加预编译头文件#include "CvvImage.h"///////////////////////////////////////////////////////////////////////////////////////////////////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 errorreturn 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 contextHALFTONE );}else{SetStretchBltMode(hDCDst, // handle to device contextCOLORONCOLOR );}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::DrawToHDC( HDC hDCDst, CvRect pDstRect ){RECT rDest=CvRectToRect(pDstRect);DrawToHDC(hDCDst,&rDest);}void CvvImage::Fill( int color ){cvSet( m_img, cvScalar(color&255,(color>>8)&255,(color>>16)&255,(color>>24)&255) );}protected:IplImage* m_img;};typedef CvvImage CImage;#endif

还有，在MFC控件上，或者在QT中(比如转化成QImage)的显示，以后再看吧，看看能不能把这些都完成了。
关于显示图片的问题，有很多方法。比如CxImage就是一个很好的选择。现在好像已经到了CxImage 7了吧
当初学的是CxImage 6，感觉很不错。首先Draw到MemDC然后贴到显示区域的DC，效率还不错。
我喜欢开源软件。呵呵。