Halcon 图像转QImage

Halcon 提供了将图像转换为 QImage 的函数，具体如下：

QImage HObject2QImage(HObject hoImage)
{
    HTuple hvChannels, hvType, hvWidth, hvHeight, hvPtr;
    HImage hImage;
    HObject hoChannel;
    QImage qImage;

    // 获取图像信息
    CountChannels(hoImage, &hvChannels);
    GetImagePointer1(hoImage, &hvPtr, &hvType, &hvWidth, &hvHeight);

    // 如果是 RGB 图像，将其转换为 GRAY 图像
    if (hvChannels == 3)
    {
        RGB1ToGray(hoImage, &hoChannel);
        hImage = HImage(hoChannel);
    }
    else
    {
        hImage = HImage(hoImage);
    }

    // 创建 QImage
    switch (hvType.I())
    {
    case 1: // 8-bit unsigned integer
        qImage = QImage((unsigned char*)hvPtr.TuplePointer(), hvWidth.I(), hvHeight.I(), QImage::Format_Grayscale8);
        break;
    case 2: // 16-bit unsigned integer
        qImage = QImage((unsigned char*)hvPtr.TuplePointer(), hvWidth.I(), hvHeight.I(), QImage::Format_Grayscale16);
        break;
    case 4: // 32-bit floating point
        qImage = QImage((unsigned char*)hvPtr.TuplePointer(), hvWidth.I(), hvHeight.I(), QImage::Format_Grayscale8);
        break;
    }

    // 如果是 RGB 图像，将其转换为 QImage
    if (hvChannels == 3)
    {
        QVector<QRgb> colorTable;
        for (int i = 0; i < 256; i++)
        {
            colorTable.append(qRgb(i, i, i));
        }
        qImage.setColorTable(colorTable);
    }

    return qImage;
}

使用方法如下：

HObject hoImage;
ReadImage(&hoImage, "image.jpg");
QImage qImage = HObject2QImage(hoImage);