Drop in an image and Dither Studio redraws it in one-bit or two-tone brand palettes, with an animate option and PNG, GIF or video export.
Dithering is how you fake shades with only a few colours. Each pixel snaps to the nearest palette colour, and the leftover error is either pushed onto neighbouring pixels (Floyd-Steinberg, Atkinson) or compared against a repeating threshold grid (Bayer 4x4). The three methods give three different textures from the same photo.
Atkinson is the crunchy, high-contrast one, and it suits portraits best.