Stacks Image 178371


HyperDither is an OS X app that uses an elegant color reduction (dithering) routine to turn color or grayscale images into 1-bit black and white. The visual effect produced by this technique creates rich, velvety tones, and is higher-quality than the “Diffusion Dither” method used by Photoshop.
HyperDither (Atkinson dithering)
Photoshop's Diffusion Dither (Floyd-Sternberg dithering)
Stacks Image 178541
HyperDither (Atkinson dithering)
Stacks Image 178577
Photoshop (Floyd-Sternberg dithering)


In the early 1980s, while developing the graphics technology for the first Macintosh, Bill Atkinson (HyperCard, QuickDraw, MacPaint) discovered a very elegant filter to convert greyscale image data for display on the Mac's 1-bit black-and-white screen.

Later, this graphics routine was implemented as an option in Apple’s HyperScan software, connecting early Macs to flatbed scanners, and nowhere else. HyperScan, and the excellent Atkinson dithering routine were subsequently unavailable for many years—but not forgotten! We emailed him to inquire about the details of the algorithm, and he was kind enough to respond with a brief write-up of the routine that is now available in HyperDither.


Stacks Image 181916
Stacks Image 181920
HyperDither by Tinrocket:
  • Turn your images into velvety black and white
  • Multi-document support
  • Sharpen and Contrast options
  • Optimized PNG export
Availability: Worldwide through the Mac App Store
Requirements: OS X 10.9 or greater
Stacks Image 181953
Tinrocket, founded in 2006 by John Balestrieri, is a Brooklyn-based company dedicated to making original, creative software for mobile and desktop. Other critically acclaimed Tinrocket apps include Waterlogue, This, Percolator, and Popsicolor.

Copyright © 2024 Tinrocket, LLC. Cinemin, Olli, This by Tinrocket, Percolator, the Percolator mark, Start Here, SMAWL, and Popsicolor are trademarks of Tinrocket, LLC. ‘Create Something Beautiful,’ ‘Tools for Seeing,’ ‘Creativity at Your Fingertips,’ ‘Your portable watercolor camera,’ ‘Get drawn in’, ‘Capture your imagination,’ ‘Your pix, brewed perfectly,’ ‘Tell the whole story,’ ‘Make your photos pop,’ ‘Grab your audience before they scroll away,’ and ‘Convert, Replace, and Save Space’ are trademarks of Tinrocket, LLC. ‘See the world like an artist’, Tinrocket, Waterlogue, and the Waterlogue mark are registered trademarks of Tinrocket, LLC. App Store is a service mark of Apple Inc.