Before we all mute the word 'dithering' I thought I'd explain a little bit about why we needed to dither digital images in the first place.

Although it's an aesthetic now, we used to need dithering to trick our eyes into seeing more colors than were actually there.

So in the early days of computing, memory was scarce and we couldn't store a lot of color detail.

To get around this we used limited palettes with lookup tables or really low bit depth colors, to reduce the number of colors in an image, also called quantization.