1、第一步：（配置工程）

配製好VS2008和OpenCV，我用的OpenCV2.31.假設VS2008和OpenCV之前都配置好了，配置鏈接：http://blog.csdn.net/shizhandong50/article/category/1700441，打開VS2008，新建一個MFC項目，這裏簡單的建立一個基於對話框項目，並在裏邊加入一個Picture control控件。加入一個按鈕，起名字設爲打開圖像，所以這個項目的任務就是打開圖像並把它顯示在Picture control中。

2、第二步：（添加庫）

右擊項目->Propertys，在Configuration Properties->Linker->Input頁面下，選中頁面上方的Debug項，Additional Dependencies中加入下列庫：

opencv_calib3d231d.lib
opencv_contrib231d.lib
opencv_core231d.lib
opencv_features2d231d.lib
opencv_flann231d.lib
opencv_gpu231d.lib
opencv_highgui231d.lib
opencv_imgproc231d.lib
opencv_legacy231d.lib
opencv_ml231d.lib
opencv_objdetect231d.lib
opencv_ts231d.lib
opencv_video231d.lib

選中release項，Additional Dependencies中加入下列庫：

opencv_calib3d231.lib
opencv_contrib231.lib
opencv_core231.lib
opencv_features2d231.lib
opencv_flann231.lib
opencv_gpu231.lib
opencv_highgui231.lib
opencv_imgproc231.lib
opencv_legacy231.lib
opencv_ml231.lib
opencv_objdetect231.lib
opencv_ts231.lib
opencv_video231.lib

這兩步貌似在新建一個用OpenCV的工程時，都要做的，不知道有沒有什麼辦法把它固化進去。

3、在對話框的**Dlg.h文件中加入頭文件，如下：

#include "cxcore.h"
#include "cv.h"
#include "ml.h"
#include "CvvImage.h"

也可以改成在stdafx.h文件中加入下述三行代碼，你會發現，waring消失了！

#include "CvvImage.h"       //OpenCV老式顯示方法CvvImage頭文件
#include "opencv.hpp"
using namespace cv;

其中CvvImage在1.0後面的OpenCV版本中已經沒有了，需要另外新建一個頭文件和CPP文件。如下：

頭文件：

#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

CPP文件：

#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) );
}

4、第四步，開始功能的實現：

在**Dlg.h的類中加入自變量：

// OpenCV對圖像進行處理時採用的結構
IplImage* m_ImgSrc;
// MFC 中通過此變量將IplImage圖片顯示到控件
CvvImage m_pImgLeft;
IplImage* gray;
char charfile[255];
CString file_name;
CRect rt;
CDC* pDC;

添加Picture control相關的變量：（添加時改一下Picture control的ID，否則無法添加）

CStatic m_picLeft;

添加打開按鈕的響應函數：

void OnBnClickedButtonOpen()
{
	// TODO: Add your control notification handler code here
	CFileDialog dlg(true); 
	if(dlg.DoModal()==IDOK) 
	{ 
		file_name=dlg.GetFileName(); 
		CStringToChar(file_name,charfile);/*自定義函數，將Cstring轉換爲 Char類型*/ 
		m_ImgSrc=cvLoadImage(charfile,1);  
	} 
	m_pImgLeft.CopyOf(m_ImgSrc,-1);  /*CvvImage 類才提供將圖片顯示於HDC上的功能*/ 
	pDC=m_picLeft.GetDC();   /*獲取Picture Control句柄*/ 
	rt.SetRect(0,0,m_pImgLeft.Width(),m_pImgLeft.Height()); 
	m_picLeft.SetWindowPos(NULL,0,0, 300,360,SWP_NOZORDER|SWP_NOMOVE); 
	/*設置Picture Control的位置信息*/ 
	m_picLeft.GetClientRect(&rt); /*使圖片的顯示大小與Picture Control的大小一致*/ 
	m_pImgLeft.DrawToHDC(pDC->GetSafeHdc(),&rt);/*將CvvImage圖在控件顯示*/ 
}

其中的CStringToChar代碼如下：

void CStringToChar(CString str, char ch[])
{
	int i; 
	char *tmpch; 
	int wLen = WideCharToMultiByte(CP_ACP, 0, str, -1, NULL, 0, NULL, NULL);//得到Char的長度 
	tmpch = new char[wLen + 1];                                             //分配變量的地址大小 
	WideCharToMultiByte(CP_ACP, 0, str, -1, tmpch, wLen, NULL, NULL);       //將CString轉換成char* 
	for(i = 0; tmpch[i] != '\0'; i++) ch[i] = tmpch[i]; 
	ch[i] = '\0'; 
}

VS2008+OpenCV+MFC編程入門

1、第一步：（配置工程）

2、第二步：（添加庫）

3、在對話框的**Dlg.h文件中加入頭文件，如下：

4、第四步，開始功能的實現：

工作中用到的腳本合集

24-5-18 X

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