public override void CopyDataTo(StageOperationParameters target)
{
base.CopyDataTo(target);
ToneStageOperationParameters t = (ToneStageOperationParameters)target;
t.mDarkTone = (Tone)mDarkTone.Clone();
t.mLightTone = (Tone)mLightTone.Clone();
t.mEdge = mEdge;
t.mSoftness = mSoftness;
t.OnChanged();
}