VS2010+Opencv+MFC讀取圖像和視頻顯示在Picture控件

2020-01-26 13:25:13

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VS2010+Opencv+MFC讀取圖像和視頻顯示在Picture控件，供大家參考，具體內容如下

1.新建MFC對話框應用程序。

其余選項默認，單擊完成，創建出對話框應用程序。刪掉原來自帶的一些控件，添加picture控件和兩個按鈕。

2.由于以后的代碼會用到CvvImage類，而opencv2.3以后就去掉了對它的支持，這里先介紹添加CvvImage支持的方法，直接能用的可以略過這一步。

如下圖添加相應的文件：

這里附上兩個文件的源碼方便使用。

#pragma once #ifndef CVVIMAGE_CLASS_DEF #define CVVIMAGE_CLASS_DEF #include "opencv.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 ); #endif protected:  IplImage* m_img; }; typedef CvvImage CImage; #endif

#include "StdAfx.h"#include "CvvImage.h"http://////////////////////////////////////////////////////////////////////// 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) );}

在需要引用該類的地方添加如下引用：

3.在Picture控件中顯示圖片

如圖所示修改控件ID，并刪除按鈕已存在的響應代碼。雙擊顯示圖片添加以下代碼：

void CopencvtestDlg::OnBnClickedCancel(){ // TODO: 在此添加控件通知處理程序代碼 CDC *pDC = GetDlgItem(IDC_STATIC)->GetDC();//根據ID獲得窗口指針再獲取與該窗口關聯的上下文指針 HDC hdc= pDC->GetSafeHdc();      // 獲取設備上下文句柄 CRect rect;// 矩形類 GetDlgItem(IDC_STATIC)->GetClientRect(&rect); //獲取box1客戶區 CvvImage cimg; IplImage *src; // 定義IplImage指針變量src   src = cvLoadImage("D://me.bmp",-1); // 將src指向當前工程文件目錄下的圖像me.bmp  cimg.CopyOf(src,src->nChannels);  cimg.DrawToHDC(hdc,&rect);//輸出圖像 ReleaseDC( pDC ); cimg.Destroy();//銷毀}

4.播放視頻

雙擊播放視頻按鈕，添加如下代碼：

void CopencvtestDlg::OnBnClickedOk(){ // TODO: 在此添加控件通知處理程序代碼 //IplImage *src; // 定義IplImage指針變量src   // src = cvLoadImage("D://me.bmp",-1); // 將src指向當前工程文件目錄下的圖像me.bmp  // cvNamedWindow("me",0);//定義一個窗口名為lena的顯示窗口  // cvShowImage("me",src);//在lena窗口中，顯示src指針所指向的圖像  // cvWaitKey(0);//無限等待，即圖像總顯示  // cvDestroyWindow("me");//銷毀窗口lena  // cvReleaseImage(&src);//釋放IplImage指針src   CDC *pDC = GetDlgItem(IDC_STATIC)->GetDC();//根據ID獲得窗口指針再獲取與該窗口關聯的上下文指針 HDC hdc= pDC->GetSafeHdc();      // 獲取設備上下文句柄 CRect rect;// 矩形類 GetDlgItem(IDC_STATIC)->GetClientRect(&rect); //獲取box1客戶區   CvCapture *capture = cvCreateFileCapture ("D://tree.avi"); //讀取視頻 if(capture==NULL) {  printf("NO capture"); //讀取不成功，則標識 //return 1; };  double fps=cvGetCaptureProperty(capture, CV_CAP_PROP_FPS ); //讀取視頻的幀率 int vfps = 1000 / fps;          //計算每幀播放的時間 printf("%5.1f/t%5d/n",fps,vfps);         double frames=cvGetCaptureProperty(capture,CV_CAP_PROP_FRAME_COUNT);//讀取視頻中有多少幀 printf("frames is %f/n",frames); //cvNamedWindow("example",CV_WINDOW_AUTOSIZE);     //定義窗口 IplImage *frame;  CvvImage cimg;  while(1){  frame = cvQueryFrame( capture );       //抓取幀 cimg.CopyOf(frame,frame->nChannels); cimg.DrawToHDC(hdc,&rect); float ratio = cvGetCaptureProperty(capture, CV_CAP_PROP_POS_AVI_RATIO);  //讀取該幀在視頻中的相對位置 printf("%f/n",ratio); if(!frame)break; //cvShowImage("IDC_STATIC",frame);       //顯示  char c = cvWaitKey(vfps); if(c == 27 )break; } ReleaseDC( pDC ); cvReleaseCapture(&capture); cvDestroyWindow("example");}

最終效果：