最近开始做
个多点触控
课题
网上查阅许多资料后发现已有先辈把核心
写好并建立了个库——Touchlib
而Touchlib库最终
是OpenCV里为了在自己课题方案中借鉴Touchlib成熟算法有必要熟悉Touchlib因此势必了解OpenCV在VC下使用我从网上下载了OpenCV 1.0依步骤安装到“J:\Program Files\OpenCV\”目录下在使用VC 6.0OpenCV的前还需做如下配置: (1)运行VC 6.0
打开opencv/_make目录下opencv.dsw文件 然后点击'组建(Build)'->' 批组建(Batch Build)'(编译大概几分钟) (2)点击'工具(Tools)'->'选项(Options)'->'目录(Directories)选项卡'
在Include files下添加: J:\Program Files\OpenCV\cv\
J:\Program Files\OpenCV\otherlibs\highgui
J:\Program Files\OpenCV\cxcore\
J:\Program Files\OpenCV\otherlibs\cvcam\
(3)在Library files下添加
J:\Program Files\OpenCV\lib
(4)在Source files下添加
J:\Program Files\OpenCV\cv\src
J:\Program Files\OpenCV\cxcore\src
J:\Program Files\OpenCV\cvaux\src
J:\Program Files\OpenCV\otherlibs\highgui
J:\Program Files\OpenCV\otherlibs\_graphics\src
(5)|*谨记*|:每次建立工程
运行前在'工程(Project)'->'设置(Settings)'->'连接(Link)选项卡'->'对象/库模块(Object/library modules)' 中添加: cv.lib highgui.lib cxcore.lib cvcam.lib
下面给出我所编写
个简单应用OpenCV例子 (1)建立
个基于DialogMFC工程OpenCV_Dlg1在头文件OpenCV_Dlg1Dlg.h中加入“# <cv.h>”“# <highgui.h>”宏命令语句 (2)添加PictureControl控件
ID号为IDC_SHOW_WINDOW图像将显示在该Control控件中 (3)给COpenCV_Dlg1Dlg类添加成员变量IplImage * m_cvImage
属性为Public并在构造COpenCV_Dlg1Dlg::COpenCV_Dlg1Dlg()中将其
化为NULL即添加“m_cvImage=NULL;”语句 (4)OpenCV有现成
cvShowImage
来显示图像但用该显示图像是却是另外开辟了个弹出窗口并在其中显示为了在我们建立PictureControl控件中显示图像需在COpenCV_Dlg1Dlg类中添加成员void DrawPicToHDC(IplImage *img, UINT ID)属性设置为PublicDrawPicToHDC代码为: //----------------------------------------------------------------------------
void COpenCV_Dlg1Dlg::DrawPicToHDC(IplImage *img, UINT ID)
{
CDC *pDC = GetDlgItem(ID)->GetDC
; HDC hDC= pDC->GetSafeHdc
; CRect rect;
CWnd * pWnd;
pWnd=GetDlgItem(ID);
pWnd->SetWindowPos( NULL,0,0,img->width,img->height,SWP_NOZORDER | SWP_NOMOVE );
pWnd->GetClientRect(&rect);
CvvImage cimg;
cimg.CopyOf(img);
cimg.DrawToHDC(hDC,&rect);
ReleaseDC(pDC);
}
//
(5)添加Button按钮
ID号为IDC_READ_PIC,标题为“读图”用于打开幅图片对该按钮添加消息响应OnReadPic: //----------------------------------------------------------------------------
void COpenCV_Dlg1Dlg::OnReadPic
{
// TODO: Add your control not
ication handler code here CString Open_Filename;
CFileDialog fDlg(TRUE,"bmp","*.bmp",OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT,
"原始图像(*.bmp)|*.bmp|所有文件(*.*)|*.*||",NULL);
(fDlg.DoModal TRUE) {
Open_Filename = fDlg.GetFileName
; (m_cvImage) cvReleaseImage(&m_cvImage);
m_cvImage = cvLoadImage(Open_Filename,1);
(m_cvImage0) MessageBox("Reading Failed");
DrawPicToHDC(m_cvImage, IDC_SHOW_WINDOW);
}
}
//
= 至此
运行
当点击“读图”按钮时会弹出对话框提示用户选择需要读入图片“确定”后便会在PictureControl控件中将图片显示出来 (6)添加EditControl控件
ID号为IDC_EDIT_TH应用向导工具MFC ClassWizard给该ID添加
型成员变量m_Th通过EditControl控件IDC_EDIT_TH用户可以输入图像分割阈值会将其自动更新到m_Th (7)添加Button按钮
ID号为IDC_THRESHOLD,标题为“阈值分割”点击它将对业已打开图片做 2值化分割对该按钮添加消息响应OnThreshold: //----------------------------------------------------------------------------
void COpenCV_Dlg1Dlg::OnThreshold
{
// TODO: Add your control not
ication handler code here UpdateData(TRUE);
(m_cvImageNULL) MessageBox("NO Source Image Found!","Warning");
{
IplImage* dst=cvCreateImage( cvSize(m_cvImage->width,m_cvImage->height), m_cvImage->depth, m_cvImage->nChannels );
cvThreshold( m_cvImage, dst, m_Th, 255, CV_THRESH_BINARY);
//原型:void cvThreshold( IplImage* src, IplImage* dst, float thresh, float maxvalue,CvThreshType type);
cvNamedWindow("Threshold"); //设置窗口名称
cvShowImage("Threshold",dst); //显示图片
cvWaitKey(0);
}
}
//
至此
当点击“读图”按钮打开幅图片该图片将在PictureControl控件中显示；在EditControl控件IDC_EDIT_TH中输入阈值并点击“阈值分割”按钮则对读入图像做 2值化处理处理结果在个新弹出窗口中显示
以上所编写
是个试验性从中可以反应出用OpenCV编程般性步骤但该依然存在Bug:即显示在PictureControl控件中图像不会重绘也就是说如果用另外个窗口遮挡PictureControl控件中图像当该窗口移去时被遮挡部分图像便显示片空白此问题有待对进步查错 
最新评论