private void UpdateCachedResult()
{
// Only redo combining the channels if settings changed.
if (!SettingsHash.Equals(_lastSettingsHash))
{
_lastSettingsHash = SettingsHash;
_cachedResult = ImageUtility.ImageGeneration.CombineChannels(Combine_ChannelPickerR.ChannelImage, Combine_ChannelPickerG.ChannelImage,
Combine_ChannelPickerB.ChannelImage, Combine_ChannelPickerA.ChannelImage);
}
}