#OpenCV##MFC#利用MFC和OpenCV通过系统对话框打开和保存图片

打开图片：

void CImageProDlg::OnImageopen()
{
    // TODO:  在此添加命令处理程序代码
    Invalidate();
    CFileDialog dlg(TRUE, NULL, NULL, OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST | OFN_READONLY,
        TEXT("Supported Types (*.jpg;*.png;*.gif;*.bmp;...)|*.jpg;*.png;*.gif;*.bmp|Tiff(*.tiff;*.tif)|*.tiff;*.tif|All Files(*.*)|*.*||"), NULL);
    dlg.m_ofn.nFilterIndex = 1;
    dlg.m_ofn.hwndOwner = m_hWnd;
    dlg.m_ofn.lStructSize = sizeof(OPENFILENAME);
    dlg.m_ofn.lpstrTitle = TEXT("Opening Image...\0");
    dlg.m_ofn.nMaxFile = MAX_PATH;
    if (dlg.DoModal() == IDOK)
    {
        m_path = dlg.GetPathName();
        m_capacity = TRUE;
        UpdateData(FALSE);
    }
    else
        return;
    //左边图片控件显示图片
    //string s_path(m_path.GetBuffer());  //这样就要#include <string.h>
    char *s_path;
    s_path = m_path.GetBuffer(m_path.GetLength());   //将CString转化为Char * 格式
        //m_StaticPath.SetWindowTextA(m_path);  //将图片路径显示到静态文本控件
    Mat Mat_image = imread(s_path, 1);
    SavedImage = Mat_image;  //全局变量
    IplImage image = Mat_image;
    DrawPicToHDC(&image, ID_SHOWLEFT);
}

保存图片：

（需输入完整路径，包括拓展名）

void CImageProDlg::OnSaveas()
{
    // TODO:  在此添加命令处理程序代码
    if (m_capacity)
    {
        CFileDialog dlg(FALSE, NULL, NULL, OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST | OFN_READONLY,
            TEXT("Supported Types (*.jpg;*.png;*.gif;*.bmp;...)|*.jpg;*.png;*.gif;*.bmp|Tiff(*.tiff;*.tif)|*.tiff;*.tif|All Files(*.*)|*.*||"), NULL);
        dlg.m_ofn.nFilterIndex = 1;
        dlg.m_ofn.hwndOwner = m_hWnd;
        dlg.m_ofn.lStructSize = sizeof(OPENFILENAME);
        dlg.m_ofn.lpstrTitle = TEXT("Saving Image...[Meantime input extension name! ]\0");
        dlg.m_ofn.nMaxFile = MAX_PATH;
        CString strPath(""), strExt("");
        char write[10000];
        if (dlg.DoModal() == IDOK)
        {
            strPath = dlg.GetPathName(); //文件名
            char *s_path;
            s_path = strPath.GetBuffer(strPath.GetLength());
            imwrite(s_path, SavedImage);
            strPath.ReleaseBuffer();
        }
    }
    else
        MessageBox("还未选择原始图片，无法保存图片！");
}