private ChannelMoments(PixelChannel channel, IntPtr instance)
{
Channel = channel;
NativeChannelMoments nativeInstance = new NativeChannelMoments(instance);
Centroid = PointD.FromPointInfo(nativeInstance.Centroid);
EllipseAngle = nativeInstance.EllipseAngle;
EllipseAxis = PointD.FromPointInfo(nativeInstance.EllipseAxis);
EllipseEccentricity = nativeInstance.EllipseEccentricity;
EllipseIntensity = nativeInstance.EllipseIntensity;
SetHuInvariants(nativeInstance);
}