将Mat图像显示到MFC PictureControl控件上

最新推荐文章于 2020-08-08 21:43:45 发布

jameshater

最新推荐文章于 2020-08-08 21:43:45 发布

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分类专栏： OpenCV

本文链接：https://blog.youkuaiyun.com/jameshater/article/details/88063597

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本文详细介绍了使用C++和OpenCV库在Windows环境下显示灰度和彩色图像的方法。通过创建BITMAPINFO结构并利用StretchDIBits函数，实现了将图像数据从OpenCV的Mat对象转换到Windows设备上下文的过程。

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void Ctracker_test190220Dlg::ShowMatImage(Mat& src,int ID)
{
	try
	{
		if (src.empty())//没有图像时推出
		{
			return;
		}

		BITMAPINFO *pBmpInfo1=NULL;
		if (src.channels() == 1)//灰度图像显示
		{
			pBmpInfo1 = (BITMAPINFO *)new char[sizeof(BITMAPINFOHEADER)+256 * sizeof(RGBQUAD)];////bmp图信息头	
			pBmpInfo1->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
			pBmpInfo1->bmiHeader.biWidth = src.cols;//src_rec.Width();
			pBmpInfo1->bmiHeader.biHeight = -src.rows; //-src_rec.Height();//为负值
			pBmpInfo1->bmiHeader.biPlanes = 1;
			pBmpInfo1->bmiHeader.biBitCount = 8;//八位
			pBmpInfo1->bmiHeader.biCompression = BI_RGB;
			pBmpInfo1->bmiHeader.biSizeImage = 0;
			pBmpInfo1->bmiHeader.biXPelsPerMeter = 0;
			pBmpInfo1->bmiHeader.biYPelsPerMeter = 0;
			pBmpInfo1->bmiHeader.biClrUsed = 0;
			pBmpInfo1->bmiHeader.biClrImportant = 0;

			for (int i = 0; i<256; i++)//只有灰度图像需要颜色表
			{
				pBmpInfo1->bmiColors[i].rgbBlue = pBmpInfo1->bmiColors[i].rgbGreen = pBmpInfo1->bmiColors[i].rgbRed = (BYTE)i;
				pBmpInfo1->bmiColors[i].rgbReserved = 0;
			}
		}
		if (src.channels() == 3)
		{
			pBmpInfo1 = (BITMAPINFO*) new char[sizeof(BITMAPINFOHEADER)];
			pBmpInfo1->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
			pBmpInfo1->bmiHeader.biWidth = src.cols;//src_rec.Width();
			pBmpInfo1->bmiHeader.biHeight = -src.rows; //-src_rec.Height();//为负值
			pBmpInfo1->bmiHeader.biPlanes = 1;
			pBmpInfo1->bmiHeader.biBitCount = 24;//24位
			pBmpInfo1->bmiHeader.biCompression = BI_RGB;
			pBmpInfo1->bmiHeader.biSizeImage = 0;
			pBmpInfo1->bmiHeader.biXPelsPerMeter = 0;
			pBmpInfo1->bmiHeader.biYPelsPerMeter = 0;
			pBmpInfo1->bmiHeader.biClrUsed = 0;
			pBmpInfo1->bmiHeader.biClrImportant = 0;
		}
		HDC h_dc = GetDlgItem(ID)->GetDC()->GetSafeHdc();
		CRect BoxSize;
		GetDlgItem(ID)->GetClientRect(&BoxSize);
		SetStretchBltMode(
			h_dc,           // handle to device context
			HALFTONE);

		int jj = StretchDIBits(h_dc, BoxSize.left, BoxSize.top, BoxSize.Width(), BoxSize.Height(), 0, 0, src.cols, src.rows, (void *)src.data,
			(BITMAPINFO*)pBmpInfo1, DIB_RGB_COLORS, SRCCOPY);
		delete[]pBmpInfo1;

		return;
	}
	catch (...)
	{
		return;
	}
}