// Standard
public CWatchImage(string name, int index, IMagickImage magickImage, double metricUpperBound)
{
Name = name;
Index = index;
MagickImage = magickImage;
HasAlpha = MagickImage != null && MagickImage.HasAlpha;
TransparencyRate = MagickImage != null?MagickImage.GetTransparencyRate() : 0;
AlphaChannel = null;
MetricUpperBound = metricUpperBound;
_PauseTicks = DateTime.MinValue.Ticks;
if (HasAlpha)
{
// Does Separate() clone the channels? If so, does it dispose of them during this?
var tmpMi = MagickImage.Separate().Last().Clone();
tmpMi.Negate();
AlphaChannel = new MagickImage(_AlphaReplacement, MagickImage.Width, MagickImage.Height);
AlphaChannel.Composite(tmpMi, CompositeOperator.CopyAlpha);
AlphaChannel.RePage();
tmpMi.Dispose();
MagickImage.ColorAlpha(_AlphaReplacement);
MagickImage.RePage();
}
}
private static double GetRatio(IMagickImage image, Channels channel, IMagickImage mask, double maskMean)
{
using (IMagickImage channelImage = image.Separate(channel).First())
{
channelImage.Composite(mask, CompositeOperator.Multiply);
var channelMean = GetMean(channelImage);
var average = 100 * channelMean / maskMean;
return(100 / average);
}
}
// May need to update to support multiple channels.
private static IMagickImage GetComposedImage(IMagickImage input, int channelIndex)
{
IMagickImage mi = input.Clone();
if (channelIndex > -1)
{
mi = mi.Separate().ToArray()[channelIndex];
}
return(mi);
}
