opencv3.X + MFC显示图片

 

 

目前网络上，使用opencv和MFC显示图片的方法大致分为以下几种：

 

 1：将opencv的显示对话框嵌入到MFC窗口

2：使用CvvImage类显示图片

 

3：自己写代码将Mat结构转换为CImage结构

 

 

方法1过于取巧，缺陷明显。方法2需要将opencv自2.x起就弃用的CvvImage类导入工程。方法3比较复杂，看他们的代码好像还要循环拷贝图像数据。

 

 

 

 

 

今天给大家介绍另外一种方法，是用google在国外网站上搜到的，整理了一下供大家参考。

opencv的环境配置大家自己搜下就行了。IDC_STATIC_IMAGE是Picture Control的控件ID

void CCircleRecognitionDlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		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;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialogEx::OnPaint();

		using namespace cv;

		CRect rect;
		int width, height;
		BITMAPINFO bitmapInfo;
		BITMAPINFOHEADER* bmiHeader;
		Mat image = imread("D:\\image\\Debug\\01.bmp");

		width = image.cols;
		height = image.rows;

		if (width % 4)
			width = (width + 3) / 4 * 4;

		cv::Size winSize(width, height);
		cv::Mat cvImgTmp(winSize, CV_8UC3);
		if (image.size() != winSize)
			cv::resize(image, cvImgTmp, winSize);
		else
			cvImgTmp = image.clone();

		GetDlgItem(IDC_STATIC_IMAGE)->GetClientRect(&rect);

		bmiHeader = &bitmapInfo.bmiHeader;
		bmiHeader->biSize = sizeof(BITMAPINFOHEADER);
		bmiHeader->biWidth = cvImgTmp.cols;
		bmiHeader->biHeight = -cvImgTmp.rows;
		bmiHeader->biPlanes = 1;
		bmiHeader->biBitCount = 24;
		bmiHeader->biCompression = BI_RGB;
		bitmapInfo.bmiHeader.biSizeImage = 0;
		bmiHeader->biXPelsPerMeter = GetSystemMetrics(SM_CXSCREEN);
		bmiHeader->biYPelsPerMeter = GetSystemMetrics(SM_CYSCREEN);
		bmiHeader->biClrUsed = 0;
		bmiHeader->biClrImportant = 0;

		StretchDIBits(GetDlgItem(IDC_STATIC_IMAGE)->GetDC()->GetSafeHdc()
			, 0, 0, std::min(rect.Width(), rect.Height()), std::min(rect.Width(), rect.Height())
			, 0, 0, cvImgTmp.cols, cvImgTmp.rows,
			cvImgTmp.data, &bitmapInfo, DIB_RGB_COLORS, SRCCOPY);
	}
}