【opencv/mfc】PICTURE控件显示图像

2019-04-15 13:39发布生成海报

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方法一：
1、VS2012与opencv2.4.9环境配置
http://blog.csdn.net/qq_15947787/article/details/50778609
2、加入CvvImage类，由于2.4.9下没有该类，手动添加
将CvvImage.h与CvvImage.cpp加入新建的工程中
CvvImage.h

#pragma once

#ifndef CVVIMAGE_CLASS_DEF
#define CVVIMAGE_CLASS_DEF

#include "opencv.hpp"

/* CvvImage class definition */
class  CvvImage
{
public:
   CvvImage();
   virtual ~CvvImage();

   /* Create image (BGR or grayscale) */
   virtual bool  Create( int width, int height, int bits_per_pixel, int image_origin = 0 );

   /* Load image from specified file */
   virtual bool  Load( const char* filename, int desired_color = 1 );

   /* Load rectangle from the file */
   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

   /* Save entire image to specified file. */
   virtual bool  Save( const char* filename );

   /* Get copy of input image ROI */
   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);

   /* width and height of ROI */
   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 );

   /* draw to highgui window */
   virtual void  Show( const char* window );

#if defined WIN32 || defined _WIN32
   /* draw part of image to the specified DC */
   virtual void  Show( HDC dc, int x, int y, int width, int height,
      int from_x = 0, int from_y = 0 );
   /* draw the current image ROI to the specified rectangle of the destination DC */
   virtual void  DrawToHDC( HDC hDCDst, RECT* pDstRect );
#endif

protected:

   IplImage*  m_img;
};

typedef CvvImage CImage;

#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();

      /* 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) );
}

3、在MFCApplication1Dlg.h加入

// MFCApplication1Dlg.h : 头文件
//
#include 
#include 
#include "CvvImage.h"

#pragma once

4、添加Picture Control与Button控件，ID分别为IDC_PIC_SHOW、IDC_BUTTON1
5、编写显示图像的函数DrawPicToHDC
在对话框类的定义中添加公共变量和公共函数

// CMFCApplication1Dlg 对话框
class CMFCApplication1Dlg : public CDialogEx
{
// 构造
public:
    CMFCApplication1Dlg(CWnd* pParent = NULL);  // 标准构造函数
// 对话框数据
    enum { IDD = IDD_MFCAPPLICATION1_DIALOG };
    protected:
    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持
// 实现
protected:
    HICON m_hIcon;
    // 生成的消息映射函数
    virtual BOOL OnInitDialog();
    afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
    afx_msg void OnPaint();
    afx_msg HCURSOR OnQueryDragIcon();
    DECLARE_MESSAGE_MAP()
public:
    CvCapture* capture;  
    IplImage* m_Frame;  
    void DrawPicToHDC(IplImage *image, UINT ID);//在控件上显示图片
};

在CPP中编写控件中显示图片的函数

void CMFCApplication1Dlg::DrawPicToHDC( IplImage *image, UINT ID )
{
    CDC *pDC = GetDlgItem(ID)->GetDC();
    HDC hDC=  pDC->GetSafeHdc();
    CRect rect;
    GetDlgItem(ID)->GetClientRect(&rect);
    CvvImage cimg;       //只有CvvImage类的图像才有下面的DrawToHDC函数
    cimg.CopyOf(image,3);
    cimg.DrawToHDC(hDC,&rect);
    ReleaseDC(pDC);
}

6、编写按钮单击事件函数void CMFCApplication1Dlg::OnBnClickedButton1()

void CMFCApplication1Dlg::OnBnClickedButton1()
{
    // TODO: 在此添加控件通知处理程序代码
    capture = cvCaptureFromCAM(0);
    m_Frame = cvQueryFrame(capture);
    SetTimer(1,10,NULL);
}

7、添加void CMFCApplication1Dlg::OnTimer(UINT_PTR nIDEvent)

void CMFCApplication1Dlg::OnTimer(UINT_PTR nIDEvent)
{
    // TODO: 在此添加消息处理程序代码和/或调用默认值
    m_Frame = cvQueryFrame(capture);
    DrawPicToHDC( m_Frame, IDC_PIC_SHOW);
    CDialogEx::OnTimer(nIDEvent);
}

8、


void CMFCApplication1Dlg::OnClose()
{
    // TODO: 在此添加消息处理程序代码和/或调用默认值
    cvReleaseCapture(&capture);

    CDialogEx::OnClose();
}

遇到的问题：
1、编译的时候提示
‘fopen’: This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.

解决方案，项目 ->属性 -> c/c++ -> 预处理器 -> 点击预处理器定义，编辑，加入_CRT_SECURE_NO_WARNINGS，即可。

cvShowImage(“123”,&IplImage(fun(image))); 2017/2/16补充
方法二：

void CMFCApplication1Dlg::OnBnClickedButton1()
{
    VideoCapture capture(0);

    while (true)
    {
        Mat frame;
        capture >> frame;

        if (!frame.empty())
        {
            CRect rect;
            GetDlgItem(IDC_PIC)->GetClientRect(&rect);

            resize(frame, frame, cv::Size(rect.Width(), rect.Height()));

            imshow("view", frame);
            waitKey(30);
        }
    }
}

BOOL CMFCApplication1Dlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();

    // 将“关于...”菜单项添加到系统菜单中。

    // IDM_ABOUTBOX 必须在系统命令范围内。
    ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
    ASSERT(IDM_ABOUTBOX < 0xF000);

    CMenu* pSysMenu = GetSystemMenu(FALSE);
    if (pSysMenu != NULL)
    {
        BOOL bNameValid;
        CString strAboutMenu;
        bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
        ASSERT(bNameValid);
        if (!strAboutMenu.IsEmpty())
        {
            pSysMenu->AppendMenu(MF_SEPARATOR);
            pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
        }
    }

    // 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动
    //  执行此操作
    SetIcon(m_hIcon, TRUE);         // 设置大图标
    SetIcon(m_hIcon, FALSE);        // 设置小图标

    // TODO: 在此添加额外的初始化代码
    namedWindow("view", WINDOW_AUTOSIZE);
    HWND hWnd = (HWND)cvGetWindowHandle("view");
    HWND hParent = ::GetParent(hWnd);
    ::SetParent(hWnd, GetDlgItem(IDC_PIC)->m_hWnd);
    ::ShowWindow(hParent, SW_HIDE);

    return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE
}

2017/9/24补充
方法三：

int CImgProcessorDlg::ShowMat(cv::Mat img, HWND hWndDisplay)  
{  
    if (img.channels()<3 )    
    {    
        return -1;    
    }    

    //构造将要显示的Mat版本图片  
    RECT rect;    
    ::GetClientRect(hWndDisplay, &rect);    
    cv::Mat imgShow( abs(rect.top - rect.bottom), abs(rect.right - rect.left), CV_8UC3 );    
    resize( img, imgShow, imgShow.size() );    

    //在控件上显示要用到的CImage类图片  
    ATL::CImage CI;    
    int w=imgShow.cols;//宽    
    int h=imgShow.rows;//高    
    int channels=imgShow.channels();//通道数    
    CI.Create( w, h, 8*channels);    

    //CI像素的复制  
    uchar *pS;    
    uchar *pImg=(uchar *)CI.GetBits();//得到CImage数据区地址    
    int step=CI.GetPitch();    
    for(int i=0;i(i);    
        for(int j=0;jfor(int k=0;k<3;k++)    
                *(pImg+i*step+j*3+k)=pS[j*3+k];    
            //注意到这里的step不用乘以3    
        }    
    }    

    //在控件显示图片  
    HDC dc ;    
    dc = ::GetDC(hWndDisplay);    
    CI.Draw( dc, 0, 0 );    
    ::ReleaseDC( hWndDisplay, dc);    
    CI.Destroy();    

    return 0;  
}

void CImgProcessorDlg::OnBnClickedBopen()  
{  
    // TODO: 在此添加控件通知处理程序代码  
    CString FilePath;  

    CFileDialog FileDlg(TRUE);  

    if (IDOK == FileDlg.DoModal())  
    {  
        //获取FileOpen对话框返回的路径名  
        FilePath = FileDlg.GetPathName();  

        //GetPathName返回的是CString类型，要经过转换为string类型才能使用imread打开图片  
        std::string pathName(FilePath.GetBuffer());  

        //读取图片  
        cv::Mat orgImg = cv::imread(pathName);  

        //显示图片  
        ShowMat(orgImg, GetDlgItem(IDC_PIMAGE)->GetSafeHwnd());  
    }  
}

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【opencv/mfc】PICTURE控件显示图像
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