使用OpenCV 2.4在MFC SDI视图或控件中加载图像 [英] using OpenCV 2.4 loading an image in MFC SDI View or Control

问题描述

在旧版本的opencv中，我们有类似CvvImage的类，该类很容易用于MFC控件以显示摄像机图像或来自OpenCV的简单图像.但是在2.4或2.3中，这种支持由OpenCV完成，我想知道我们是否在新版本中还有其他任何类.

In old version of opencv we had the class like CvvImage, that were easily used for MFC controls to display camera images or simple images from the OpenCV. But in 2.4 or 2.3 this support is finished by the OpenCV , i wonder if we have any other class in new version.

我的应用程序是MFC SDI，内部视图使我无法使用OnPaint函数.在以前的opencv中，我使用

My application is MFC SDI and inside view i am over riding the OnPaint function. In previous opencv i was using Paint function like

void CRightCameraView::OnPaint()
{
    CPaintDC dc(this); // device context for painting
    m_CVvimageObj.CopyOf(m_iplImageFrame); //copy IplImage frame

    if(m_bImageDisplay)
    {
    m_CVvimageObj.Show(dc.GetSafeHdc(),10,0,m_CVvimageObj.Width(),m_CVvimageObj.Height());
    }


}

请指导我这是该类的最新版本，它可以执行相同的操作并支持MFC的此类DC控件.

Kindly guide me which is the most update version of class to do same thing and support such DC controls of MFC.

推荐答案

由于我找不到答案，所以我想帮助别人.

Since i could not find the answer i would like to help others what i did.

我手动提取了cvvimage类，并将其添加到我的项目中，然后执行以下操作..

I have extracted cvvimage class manually and added in my project and then i did the following ..

在我声明的视图头文件中

in my views header file i declared

CvvImage m_CVvImageObj;
cv::Mat m_matImage;

在我的CPP文件中，我在初始化函数中调用了

inside my CPP file of view , i have called following in initialization function

m_matImage = cv::imread(strA.GetBuffer(),CV_LOAD_IMAGE_COLOR);   // Read the file

if(! m_matImage.data )                              // Check for invalid input
{
    AfxMessageBox(L"Could not open or find the image");
}


 IplImage iplimg = m_matImage;
 m_CVvImageObj.CopyOf(&iplimg);
 UpdateData();
 Invalidate();

在我添加的OnPaint内部视图的重要功能内

inside the overided function of OnPaint inside view i added

if(m_CVvImageObj.GetImage())
{       
    //m_CurrentFrame.Show
        m_CVvImageObj.Show(dc.GetSafeHdc(),10,0,m_CVvImageObj.Width(),m_CVvImageObj.Height());
}

Cvvimage h文件如下

Cvvimage h file is the following

#pragma once

//#pragma once  
#ifndef CVVIMAGE_CLASS_DEF  
#define CVVIMAGE_CLASS_DEF  

#include <opencv2\highgui\highgui.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 );  
    virtual void DrawToHDC( HDC hDCDst, CvRect pDstRect ); 
#endif  

protected:

    IplImage* m_img;

};

typedef CvvImage CImage;

#endif

cvvimage类的CPP文件紧随其后

and CPP file for cvvimage class is following

///////////////////////////////////////////////////////////////////////////////////////////////////
//CvvImage.cpp

#include "StdAfx.h"  
#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 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::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) );
}

享受.

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