opencv2.2 MFC picture控件中显示图片

在opencv2.2中，去除了CvvImage类，当需要在picture控件中显示图片时，可以引入之前版本的CvvImage类。

参考opencv论坛上面的实现：

View Code 
 1 //CvvImage.h
 2 #pragma once
 3 
 4 #ifndef CVVIMAGE_CLASS_DEF
 5 #define CVVIMAGE_CLASS_DEF
 6 
 7 #include <opencv2/opencv.hpp>
 8 
 9 /* CvvImage class definition */
10 class  CvvImage
11 {
12 public:
13    CvvImage();
14    virtual ~CvvImage();
15 
16    /* Create image (BGR or grayscale) */
17    virtual bool  Create( int width, int height, int bits_per_pixel, int image_origin = 0 );
18 
19    /* Load image from specified file */
20    virtual bool  Load( const char* filename, int desired_color = 1 );
21 
22    /* Load rectangle from the file */
23    virtual bool  LoadRect( const char* filename,
24       int desired_color, CvRect r );
25 
26 #if defined WIN32 || defined _WIN32
27    virtual bool  LoadRect( const char* filename,
28       int desired_color, RECT r )
29    {
30       return LoadRect( filename, desired_color,
31          cvRect( r.left, r.top, r.right - r.left, r.bottom - r.top ));
32    }
33 #endif
34 
35    /* Save entire image to specified file. */
36    virtual bool  Save( const char* filename );
37 
38    /* Get copy of input image ROI */
39    virtual void  CopyOf( CvvImage& image, int desired_color = -1 );
40    virtual void  CopyOf( IplImage* img, int desired_color = -1 );
41 
42    IplImage* GetImage() { return m_img; };
43    virtual void  Destroy(void);
44 
45    /* width and height of ROI */
46    int Width() { return !m_img ? 0 : !m_img->roi ? m_img->width : m_img->roi->width; };
47    int Height() { return !m_img ? 0 : !m_img->roi ? m_img->height : m_img->roi->height;};
48    int Bpp() { return m_img ? (m_img->depth & 255)*m_img->nChannels : 0; };
49 
50    virtual void  Fill( int color );
51 
52    /* draw to highgui window */
53    virtual void  Show( const char* window );
54 
55 #if defined WIN32 || defined _WIN32
56    /* draw part of image to the specified DC */
57    virtual void  Show( HDC dc, int x, int y, int width, int height,
58       int from_x = 0, int from_y = 0 );
59    /* draw the current image ROI to the specified rectangle of the destination DC */
60    virtual void  DrawToHDC( HDC hDCDst, RECT* pDstRect );
61 #endif
62 
63 protected:
64 
65    IplImage*  m_img;
66 };
67 
68 typedef CvvImage CImage;
69 
70 #endif
View Code 
  1 //CvvImage.cpp
  2 #include "StdAfx.h"
  3 #include "CvvImage.h"
  4 
  5 //////////////////////////////////////////////////////////////////////
  6 // Construction/Destruction
  7 //////////////////////////////////////////////////////////////////////
  8 
  9 CV_INLINE RECT NormalizeRect( RECT r );
 10 CV_INLINE RECT NormalizeRect( RECT r )
 11 {
 12    int t;
 13 
 14    if( r.left > r.right )
 15    {
 16       t = r.left;
 17       r.left = r.right;
 18       r.right = t;
 19    }
 20 
 21    if( r.top > r.bottom )
 22    {
 23       t = r.top;
 24       r.top = r.bottom;
 25       r.bottom = t;
 26    }
 27 
 28    return r;
 29 }
 30 
 31 CV_INLINE CvRect RectToCvRect( RECT sr );
 32 CV_INLINE CvRect RectToCvRect( RECT sr )
 33 {
 34    sr = NormalizeRect( sr );
 35    return cvRect( sr.left, sr.top, sr.right - sr.left, sr.bottom - sr.top );
 36 }
 37 
 38 CV_INLINE RECT CvRectToRect( CvRect sr );
 39 CV_INLINE RECT CvRectToRect( CvRect sr )
 40 {
 41    RECT dr;
 42    dr.left = sr.x;
 43    dr.top = sr.y;
 44    dr.right = sr.x + sr.width;
 45    dr.bottom = sr.y + sr.height;
 46 
 47    return dr;
 48 }
 49 
 50 CV_INLINE IplROI RectToROI( RECT r );
 51 CV_INLINE IplROI RectToROI( RECT r )
 52 {
 53    IplROI roi;
 54    r = NormalizeRect( r );
 55    roi.xOffset = r.left;
 56    roi.yOffset = r.top;
 57    roi.width = r.right - r.left;
 58    roi.height = r.bottom - r.top;
 59    roi.coi = 0;
 60 
 61    return roi;
 62 }
 63 
 64 void  FillBitmapInfo( BITMAPINFO* bmi, int width, int height, int bpp, int origin )
 65 {
 66    assert( bmi && width >= 0 && height >= 0 && (bpp == 8 || bpp == 24 || bpp == 32));
 67 
 68    BITMAPINFOHEADER* bmih = &(bmi->bmiHeader);
 69 
 70    memset( bmih, 0, sizeof(*bmih));
 71    bmih->biSize = sizeof(BITMAPINFOHEADER);
 72    bmih->biWidth = width;
 73    bmih->biHeight = origin ? abs(height) : -abs(height);
 74    bmih->biPlanes = 1;
 75    bmih->biBitCount = (unsigned short)bpp;
 76    bmih->biCompression = BI_RGB;
 77 
 78    if( bpp == 8 )
 79    {
 80       RGBQUAD* palette = bmi->bmiColors;
 81       int i;
 82       for( i = 0; i < 256; i++ )
 83       {
 84          palette[i].rgbBlue = palette[i].rgbGreen = palette[i].rgbRed = (BYTE)i;
 85          palette[i].rgbReserved = 0;
 86       }
 87    }
 88 }
 89 
 90 CvvImage::CvvImage()
 91 {
 92    m_img = 0;
 93 }
 94 
 95 void CvvImage::Destroy()
 96 {
 97    cvReleaseImage( &m_img );
 98 }
 99 
100 CvvImage::~CvvImage()
101 {
102    Destroy();
103 }
104 
105 bool  CvvImage::Create( int w, int h, int bpp, int origin )
106 {
107    const unsigned max_img_size = 10000;
108 
109    if( (bpp != 8 && bpp != 24 && bpp != 32) ||
110       (unsigned)w >=  max_img_size || (unsigned)h >= max_img_size ||
111       (origin != IPL_ORIGIN_TL && origin != IPL_ORIGIN_BL))
112    {
113       assert(0); // most probably, it is a programming error
114       return false;
115    }
116 
117    if( !m_img || Bpp() != bpp || m_img->width != w || m_img->height != h )
118    {
119       if( m_img && m_img->nSize == sizeof(IplImage))
120          Destroy();
121 
122       /* prepare IPL header */
123       m_img = cvCreateImage( cvSize( w, h ), IPL_DEPTH_8U, bpp/8 );
124    }
125 
126    if( m_img )
127       m_img->origin = origin == 0 ? IPL_ORIGIN_TL : IPL_ORIGIN_BL;
128 
129    return m_img != 0;
130 }
131 
132 void  CvvImage::CopyOf( CvvImage& image, int desired_color )
133 {
134    IplImage* img = image.GetImage();
135    if( img )
136    {
137       CopyOf( img, desired_color );
138    }
139 }
140 
141 
142 #define HG_IS_IMAGE(img)                                                  \
143    ((img) != 0 && ((const IplImage*)(img))->nSize == sizeof(IplImage) && \
144    ((IplImage*)img)->imageData != 0)
145 
146 
147 void  CvvImage::CopyOf( IplImage* img, int desired_color )
148 {
149    if( HG_IS_IMAGE(img) )
150    {
151       int color = desired_color;
152       CvSize size = cvGetSize( img );
153 
154       if( color < 0 )
155          color = img->nChannels > 1;
156 
157       if( Create( size.width, size.height,
158          (!color ? 1 : img->nChannels > 1 ? img->nChannels : 3)*8,
159          img->origin ))
160       {
161          cvConvertImage( img, m_img, 0 );
162       }
163    }
164 }
165 
166 
167 bool  CvvImage::Load( const char* filename, int desired_color )
168 {
169    IplImage* img = cvLoadImage( filename, desired_color );
170    if( !img )
171       return false;
172 
173    CopyOf( img, desired_color );
174    cvReleaseImage( &img );
175 
176    return true;
177 }
178 
179 
180 bool  CvvImage::LoadRect( const char* filename,
181                    int desired_color, CvRect r )
182 {
183    if( r.width < 0 || r.height < 0 ) return false;
184 
185    IplImage* img = cvLoadImage( filename, desired_color );
186    if( !img )
187       return false;
188 
189    if( r.width == 0 || r.height == 0 )
190    {
191       r.width = img->width;
192       r.height = img->height;
193       r.x = r.y = 0;
194    }
195 
196    if( r.x > img->width || r.y > img->height ||
197       r.x + r.width < 0 || r.y + r.height < 0 )
198    {
199       cvReleaseImage( &img );
200       return false;
201    }
202 
203    /* truncate r to source image */
204    if( r.x < 0 )
205    {
206       r.width += r.x;
207       r.x = 0;
208    }
209    if( r.y < 0 )
210    {
211       r.height += r.y;
212       r.y = 0;
213    }
214 
215    if( r.x + r.width > img->width )
216       r.width = img->width - r.x;
217 
218    if( r.y + r.height > img->height )
219       r.height = img->height - r.y;
220 
221    cvSetImageROI( img, r );
222    CopyOf( img, desired_color );
223 
224    cvReleaseImage( &img );
225    return true;
226 }
227 
228 
229 bool  CvvImage::Save( const char* filename )
230 {
231    if( !m_img )
232       return false;
233    cvSaveImage( filename, m_img );
234    return true;
235 }
236 
237 
238 void  CvvImage::Show( const char* window )
239 {
240    if( m_img )
241       cvShowImage( window, m_img );
242 }
243 
244 
245 void  CvvImage::Show( HDC dc, int x, int y, int w, int h, int from_x, int from_y )
246 {
247    if( m_img && m_img->depth == IPL_DEPTH_8U )
248    {
249       uchar buffer[sizeof(BITMAPINFOHEADER) + 1024];
250       BITMAPINFO* bmi = (BITMAPINFO*)buffer;
251       int bmp_w = m_img->width, bmp_h = m_img->height;
252 
253       FillBitmapInfo( bmi, bmp_w, bmp_h, Bpp(), m_img->origin );
254 
255       from_x = MIN( MAX( from_x, 0 ), bmp_w - 1 );
256       from_y = MIN( MAX( from_y, 0 ), bmp_h - 1 );
257 
258       int sw = MAX( MIN( bmp_w - from_x, w ), 0 );
259       int sh = MAX( MIN( bmp_h - from_y, h ), 0 );
260 
261       SetDIBitsToDevice(
262          dc, x, y, sw, sh, from_x, from_y, from_y, sh,
263          m_img->imageData + from_y*m_img->widthStep,
264          bmi, DIB_RGB_COLORS );
265    }
266 }
267 
268 
269 void  CvvImage::DrawToHDC( HDC hDCDst, RECT* pDstRect )
270 {
271    if( pDstRect && m_img && m_img->depth == IPL_DEPTH_8U && m_img->imageData )
272    {
273       uchar buffer[sizeof(BITMAPINFOHEADER) + 1024];
274       BITMAPINFO* bmi = (BITMAPINFO*)buffer;
275       int bmp_w = m_img->width, bmp_h = m_img->height;
276 
277       CvRect roi = cvGetImageROI( m_img );
278       CvRect dst = RectToCvRect( *pDstRect );
279 
280       if( roi.width == dst.width && roi.height == dst.height )
281       {
282          Show( hDCDst, dst.x, dst.y, dst.width, dst.height, roi.x, roi.y );
283          return;
284       }
285 
286       if( roi.width > dst.width )
287       {
288          SetStretchBltMode(
289             hDCDst,           // handle to device context
290             HALFTONE );
291       }
292       else
293       {
294          SetStretchBltMode(
295             hDCDst,           // handle to device context
296             COLORONCOLOR );
297       }
298 
299       FillBitmapInfo( bmi, bmp_w, bmp_h, Bpp(), m_img->origin );
300 
301       ::StretchDIBits(
302          hDCDst,
303          dst.x, dst.y, dst.width, dst.height,
304          roi.x, roi.y, roi.width, roi.height,
305          m_img->imageData, bmi, DIB_RGB_COLORS, SRCCOPY );
306    }
307 }
308 
309 
310 void  CvvImage::Fill( int color )
311 {
312    cvSet( m_img, cvScalar(color&255,(color>>8)&255,(color>>16)&255,(color>>24)&255) );
313 }

直接在工程中添加上这两个实现文件就可以了。

显示图片的代码：

View Code 
 1 void CPersonWidthDlg::showimg(void)
 2 {
 3     Mat img = imread(".\\lena.jpg");
 4     IplImage iplImg = IplImage(img);
 5 
 6     CDC* pDC = GetDlgItem(IDC_FRAME)->GetDC();
 7     HDC hdc = pDC->GetSafeHdc();
 8     RECT rect;
 9     GetDlgItem(IDC_FRAME)->GetClientRect(&rect);
10 
11     CvvImage cvvImg;
12     cvvImg.CopyOf(&iplImg);
13     cvvImg.DrawToHDC(hdc,&rect);
14 
15     ReleaseDC(pDC);        
16 }
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原文地址：https://www.cnblogs.com/ifinver/p/2711303.html