high data density which is what you want the energy function is just the square reconstruction error between the between every point in the space and the point that it maps to and those little vectors here can indicate the displacement if you want and the color indicates the energy function it's an issue which is that the energy is actually zero on this this is not a Ridge it's actually a valley and it's terrible okay so there's a it's a flaw of denoising auto-encoder it can create values in places that you shouldn't have