MFC+opencv显示图片

这个也是根据别人的博客完成了相关显示的工作，整理一下也帮助大家学习。
新版本的opencv取消了CvvImage，然而就不支持在MFC中显示了，可以直接把CvvImage这个类直接拷贝到项目中来，可以直接编译使用，非常方便。
具体过程如下：
1、同样需要添加picture control的控件用于显示视频流传来的图片。

2、拷贝CvvImage类到项目中来
CvvImage.h:

#ifndef _CVVIMAGE_H_#define _CVVIMAGE_H_#pragma once#include <opencv2/highgui/highgui.hpp>#include <opencv2/core/core.hpp>#include <opencv2/imgproc/imgproc.hpp>#include <opencv2/imgproc/imgproc_c.h>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 );#endifprotected:    IplImage* m_img;};typedef CvvImage CvImage;#endif

CvvImage.cpp:

#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) );}

3、对图片重定义大小：使用resizeImage(IplImage* img,Rect rect)函数：

void resizeImage(IplImage* img,RECT rc){    IplImage *pDesImg = NULL;    CvSize cvSize;    cvSize.width = abs(rc.right-rc.left);    cvSize.height =abs(rc.bottom - rc.top);    pDesImg = cvCreateImage(cvSize,img->depth,img->nChannels);    cvResize(img,pDesImg,CV_INTER_LINEAR);    img = pDesImg;    cvReleaseImage(&pDesImg);}

显示图片使用showImage函数：

void CTrackingAppDlg::showImage(IplImage* img,UINT ID){    //CDC* pDC=GetDlgItem(ID)->GetDC();// 获得显示控件的 DC    //HDC hDC=pDC->GetSafeHdc();// 获取 HDC(设备句柄) 来进行绘图操作    CRect rect;    GetDlgItem(ID)->GetClientRect(&rect);    resizeImage(img,rect);    CvvImage cimg;    cimg.CopyOf(img);    // 复制图片    if(ID == IDC_PIC_RAW)        cimg.DrawToHDC(hDc[0],&rect);    else if(ID == IDC_PIC_BIT)        cimg.DrawToHDC(hDc[1],&rect);    else        ;    //InvalidateRect(rect, true);}

3、设置一个定时器，定时刷新picture control中的显示图片。

void CTrackingAppDlg::OnTimer(UINT_PTR nIDEvent){    showImage(picView->getRawImage(),IDC_PIC_RAW);    showImage(picView->getBitImage(),IDC_PIC_BIT);    CDialogEx::OnTimer(nIDEvent);}