1 在新插入的对话框中添加两个Picture Control和两个Button

2 打开图像代码和显示图像代码和前面两篇博文类似

BEGIN_MESSAGE_MAP(CEdgeDetDlg, CDialogEx)ON_WM_PAINT()ON_BN_CLICKED(IDC_OPEN_BTN, &CEdgeDetDlg::OnClickedOpenBtn)ON_BN_CLICKED(IDC_EDGE_DETECTION_BTN, &CEdgeDetDlg::OnClickedEdgeDetectionBtn)
END_MESSAGE_MAP()// CEdgeDetDlg 消息处理程序void CEdgeDetDlg::OnClickedOpenBtn()
{// TODO: 在此添加控件通知处理程序代码CFileDialog dlg(TRUE,_T(".bmp"),_T("*.jpg"),OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,_T("Bit Map(*.bmp)|*.bmp|JPEG Map(*.jpg)|*.jpg||"));if(dlg.DoModal() == IDOK){if(!yuantu.IsNull()){yuantu.Destroy();}yuantu.Load(dlg.GetPathName());Invalidate(FALSE);}
}//边缘检测
void CEdgeDetDlg::OnClickedEdgeDetectionBtn()
{if (yuantu.IsNull()){MessageBox(_T("还未打开图像"),_T("系统提示"),MB_OK);return;}if(!bianyuantu.IsNull()){bianyuantu.Destroy();}int i,j,temp;int pixel[4];int width = yuantu.GetWidth();int height = yuantu.GetHeight();int widthBytes = yuantu.GetPitch();bianyuantu.Create(width,height,yuantu.GetBPP());if(yuantu.IsIndexed()){yuantu.GetColorTable(0,256,colorTable);bianyuantu.SetColorTable(0,256,colorTable);}BYTE *pYuantuData = (BYTE*)yuantu.GetBits();BYTE *pBianyuantuData =(BYTE*)bianyuantu.GetBits();for(j=0;j<height-1;j++){for(i=0;i<width-1;i++){pixel[0]=pYuantuData[j*widthBytes+i];pixel[1]=pYuantuData[j*widthBytes+i+1];pixel[2]=pYuantuData[(j+1)*widthBytes+i];pixel[3]=pYuantuData[(j+1)*widthBytes+i+1];temp=(int)sqrt((double)((pixel[0]-pixel[3])*(pixel[0]-pixel[3])+(pixel[1]-pixel[2])*(pixel[1]-pixel[2])));pBianyuantuData[j*widthBytes+i]=temp;}}Invalidate(FALSE);
}void CEdgeDetDlg::OnPaint()
{if (IsIconic()){CPaintDC dc(this); // 用于绘制的设备上下文SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);// 使图标在工作区矩形中居中int cxIcon = GetSystemMetrics(SM_CXICON);int cyIcon = GetSystemMetrics(SM_CYICON);CRect rect;GetClientRect(&rect);int x = (rect.Width() - cxIcon + 1) / 2;int y = (rect.Height() - cyIcon + 1) / 2;// 绘制图标dc.DrawIcon(x, y, m_hIcon);}else{CDialogEx::OnPaint();if(!yuantu.IsNull()){CWnd* pWndYuantu = this->GetDlgItem(IDC_YUANTU);CDC* pdc = pWndYuantu->GetDC();yuantu.Draw(pdc->GetSafeHdc(), 0, 0);pWndYuantu->ReleaseDC(pdc);}if(!bianyuantu.IsNull()){CWnd* pWndBianyuantu = this->GetDlgItem(IDC_BIANYUANTU);CDC* pdc = pWndBianyuantu->GetDC();bianyuantu.Draw(pdc->GetSafeHdc(), 0, 0);pWndBianyuantu->ReleaseDC(pdc);}}
}

测试时用的是灰度图像，实现效果如下：

转载：http://blog.csdn.net/foreverling/article/details/40116763