c++ - 如何将 cv::Mat 转换为 MFC CBitmap

Question

如何将 OpenCV 图像转换为 Microsoft 基础类 (MFC) CBitmap 对象？

我尝试了以下，但失败了，

    cv::Mat tmp;
    (Load opencv image ...)

    cv::Size size = tmp.size();
    CBitmap bitmap;
    // 3 colors (RGB), 24bits (8bits*3channels) 
    if (!bitmap.CreateBitmap(128, 128, 1, 24, (void *)tmp.data)) {
        TRACE0("Failed to create bitmap for image display\n");
        return;
    }

这会导致黑色图像..

Answer 1

This post分享将 IplImage 转换为 CBitmap 的方法:

CBitmap* IplImageToCBitmap(IplImage* img) 
{
    CDC dc;
    CDC memDC;

    if (!dc.CreateDC("DISPLAY", NULL, NULL, NULL))
        return NULL;

    if (!memDC.CreateCompatibleDC(&dc))
        return NULL;

    CBitmap* bmp = new CBitmap();
    CBitmap* pOldBitmap;

    bmp->CreateCompatibleBitmap(&dc, img->width, img->height);
    pOldBitmap = memDC.SelectObject(bmp);

    CvvImage cvImage; // you will need OpenCV_2.2.0- to use CvvImage 
    cvImage.CopyOf(img);
    cvImage.Show(memDC.m_hDC, 0, 0, img->width, img->height, 0, 0);
    cvImage.Destroy();

    memDC.SelectObject(pOldBitmap);
    memDC.DeleteDC();
    dc.DeleteDC();

    return bmp;
}

基于此，你可以通过如下调用来实现你的目标:

cv::Mat aMat;
CBitmap *aCBitmap = IplImageToCBitmap((IplImage*) &aMat);