public IMagickImage Execute(IMagickImage image, ValueItemCollection values)
{
Variables = values;
if (Normalize)
{
image.Normalize();
}
if (AutoGamma)
{
image.AutoGamma();
}
if (Brightness != 0 || ContrastValue != 0)
{
image.BrightnessContrast(new Percentage(Brightness), new Percentage(ContrastValue));
}
if (Saturation != 0 || Hue != 0)
{
image.Modulate(new Percentage(100), new Percentage(Saturation + 100), new Percentage(Hue + 100));
}
if (AutoLevel)
{
image.AutoLevel(Channels.All);
}
else
{
if (BlackPoint != 0 || WhitePoint != 100 || MidPoint != 0)
{
var midpoint = 1.0;
if (MidPoint < 0)
{
midpoint = -MidPoint / 10.0;
midpoint++;
}
if (MidPoint > 0)
{
midpoint = (100 - MidPoint) / 100.0;
}
image.Level(new Percentage(BlackPoint), new Percentage(WhitePoint), midpoint);
}
}
return(image);
}