近期项目中在学习全景相机相关知识
当然首先要开始将基本的MFC学会才能封装SDK
首先建立MFC对话框工程
具体的详细知识就不说了,网上有很多的教程。
添加如下控件
中间显示部分是picture control控件
采用定时器更新picture 显示框
首先包含opencv相关的头文件,在CUpanoCameraDlg.h中添加以下变量
private: CRect rect; CStatic* pStc; //标识图像显示的Picture控件 CDC* pDC; //视频显示控件设备上下文 HDC hDC; //视频显示控件设备句柄 CvCapture* capture; //视频获取结构
public: afx_msg void OnBnClickedButvideo(); afx_msg void OnTimer(UINT_PTR nIDEvent);
在 UpanoCameraDlg.cpp中添加ON_WM_TIMER()消息映射,
BEGIN_MESSAGE_MAP(CUpanoCameraDlg, CDialogEx) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_TIMER() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_BUTPLAY, &CUpanoCameraDlg::OnBnClickedButplay) ON_BN_CLICKED(IDC_BUTVIDEO, &CUpanoCameraDlg::OnBnClickedButvideo) END_MESSAGE_MAP()
在BOOL CUpanoCameraDlg::OnInitDialog()中添加
pStc=(CStatic *)GetDlgItem(IDC_PICUPANO);//IDC_VIEW为Picture控件ID pStc->GetClientRect(&rect);//将CWind类客户区的坐标点传给矩形 pDC=pStc->GetDC(); //得到Picture控件设备上下文 hDC=pDC->GetSafeHdc(); //得到控件设备上下文的句柄
添加按键消息处理函数void CUpanoCameraDlg::OnBnClickedButvideo(),可以在资源按键控件直接双击,就能生成函数模版
void CUpanoCameraDlg::OnBnClickedButvideo() { // TODO: 在此添加控件通知处理程序代码 capture = cvCaptureFromCAM(0);//打开USB摄像头 //capture=cvCaptureFromAVI("result.avi"); if (!capture) { //AfxMessageBox("无法获得摄像头"); fprintf(stderr, "Can not open camera.\n"); return; } /* IplImage* m_Frame; m_Frame=cvQueryFrame(capture); CvvImage m_CvvImage; m_CvvImage.CopyOf(m_Frame,1); m_CvvImage.DrawToHDC(hDC, &rect); */ SetTimer(1,100,NULL);//设置定时器,视频刷新定时器,决定了帧率 }
添加OnTimer处理函数,类似回调函数,注意OpenCV2.2以后就不支持CvvImage类了,所以需要自己添加CvvImage.h和CvvImage.cpp,源码见附件
void CUpanoCameraDlg::OnTimer(UINT_PTR nIDEvent) { // TODO: 在此添加消息处理程序代码和/或调用默认值 // KillTimer(nIDEvent); IplImage* m_Frame; m_Frame=cvQueryFrame(capture); //从视频中取出一幅图像 CvvImage m_CvvImage; m_CvvImage.CopyOf(m_Frame,1); m_CvvImage.DrawToHDC(hDC, &rect); //通过句柄hDC,显示 CUpanoCameraDlg::OnTimer(nIDEvent); }
或者将SetTimer(1,100,NULL) 改为SetTimer(1,100,Func),其中Func为自定义回调函数
VOID CALLBACK Func(HWND hwnd, UINT uMsg, UINT_PTR idEvent, DWORD dwTime ) { //MessageBox(NULL,L"Hello",L"ALARM",1);如果报错,则需要在字符串变量前加上 L } void CUpanoCameraDlg::OnBnClickedButvideo() { // TODO: 在此添加控件通知处理程序代码 capture = cvCaptureFromCAM(0); //capture=cvCaptureFromAVI("result.avi"); if (!capture) { //AfxMessageBox("无法获得摄像头"); fprintf(stderr, "Can not open camera.\n"); return; } //SetTimer(1,100,NULL);//设置定时器 SetTimer(1,5000,Func); }
效果如下,其他暂停函数就没有贴上来了,这些按照自己的想法加
参考:
附件:
CvvImage.h
#ifndef CVVIMAGE_CLASS_DEF #define CVVIMAGE_CLASS_DEF #ifndef RC_OPENCV_2_1_0 #include <opencv/cv.h> #include <opencv/highgui.h> /* 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 #endif
CvvImage.cpp
#include "stdafx.h" #ifndef RC_OPENCV_2_1_0 #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) ); } #endif
时间: 2024-10-10 13:38:02