public PixelDifference(Point position, Rgba64 expected, Rgba64 actual)
{
Position = position;
RedDifference = actual.R - expected.R;
GreenDifference = actual.G - expected.G;
BlueDifference = actual.B - expected.B;
AlphaDifference = actual.A - expected.A;
var actualLengthSquared = actual.ToVector4().LengthSquared();
var expectedLengthSquared = expected.ToVector4().LengthSquared();
Delta = actualLengthSquared < expectedLengthSquared ? 0.0f : 1.0f;
}