Qt QImage 灰度图转单色图

//将灰度图转换为单色图
QImage MainWindow::GrayToFluoImage(const QImage image, int cR, int cG, int cB)
{
    quint64 w = image.width();
    quint64 h = image.height();
    if(image.isNull())
    {
        return QImage();
    }
    QImage resImage(w, h, QImage::Format_RGB32);
    //qDebug() << "Color:" << cR << cG << cB;
    for (qint64 y = 0; y < h; ++y)
    {
        for (qint64 x = 0; x < w; ++x)
        {
            QRgb dataI1 = image.pixel(x, y);
            double tM = qGray(dataI1);
            double tR = (tM / 255.0) * (double)(cR / 255.0);
            double tG = (tM / 255.0) * (double)(cG / 255.0);
            double tB = (tM / 255.0) * (double)(cB / 255.0);
            resImage.setPixel(x, y, qRgb(255*tR, 255*tG, 255*tB));
        }
    }
    return resImage;
}