Sierra-3 Dithering Online

The middle path.

Unprocessed source photograph — Original

Photograph processed with Sierra-3 dithering using the B&W (2 colors) palette — Sierra-3 · B&W (2 colors)

Try Sierra-3 on your image

Frankie Sierra designed this kernel to sit deliberately between the tight spread of Floyd-Steinberg and the wide reach of Jarvis, using ten neighbours across two rows.

It produces a slightly softer grain than Floyd-Steinberg with better gradient handling, without going as soft as Jarvis. If Floyd-Steinberg looks too noisy on your image and Jarvis looks too smeared, this is usually the answer.

When Floyd-Steinberg is too noisy and Jarvis is too soft.

Other dithering algorithms

Floyd-Steinberg Atkinson Ordered (Bayer)Jarvis-Judice-Ninke Stucki Burkes

Try it with a palette

Game Boy NES Commodore 64 CGA Apple II ZX Spectrum PICO-8 Black and White (1-bit)Grayscale 4 Grayscale 8 Grayscale 16

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