public bool IsLike(sPixel pixel)
{
if (!AllowThresholds)
return (this == pixel);
var delta = this.ChrominanceV - pixel.ChrominanceV;
if (delta > _CHROMA_V_TRIGGER || delta < -_CHROMA_V_TRIGGER)
return false;
delta = this.Luminance - pixel.Luminance;
if (delta > _LUMINANCE_TRIGGER || delta < -_LUMINANCE_TRIGGER)
return false;
delta = this.ChrominanceU - pixel.ChrominanceU;
return delta <= _CHROMA_U_TRIGGER && delta >= -_CHROMA_U_TRIGGER;
}