HyperDither
HyperDither
1.3
4.7
0.0
HyperDither free download for Mac

HyperDither for Mac1.3

19 February 2011

Convert images to 1-bit black and white.

What is HyperDither for Mac

HyperDither is an OS X image processing utility that converts color or grayscale images to 1 bit black & white using a sophisticated dithering routine. Specifically, HyperDither implements the ?Atkinson? dithering filter.

Years ago, during the development of the first Mac, Bill Atkinson (of HyperCard, QuickDraw, MacPaint & now nature photography fame) discovered a very elegant dithering filter to convert greyscale image data to the 1 bit black & white Mac video display. The dithering produced by this routine was much higher quality than the now-a-days ubiquitous Floyd-Steinberg or "Error-diffusion" filter (used by QuickTime, PhotoShop).

The dither matrix was implemented as an option in Apple's long-lost HyperScan software (A HyperCard stack with some XCMDs/XFCNs) that would connect an early Mac to a flatbed scanner. HyperScan, and hence the most-excellent Atkinson dithering routine, has been unavailable for many, many years - but not forgotten! I was able to email Bill Atkinson in January, 2003 and inquire about the details of the algorithm; he was kind enough to respond with a brief write up of the routine - 15 minutes later I had it up and running.

It's taken a few spare afternoons since 2003 to pack everything into a nice little application with documentation and an icon - better late than never!

What's new in HyperDither

Version 1.3:
  • 12.5%, 25% & 50% reduced views
  • Optimized PNG export -- tiny, loss-less files!
  • Several redraw bugs related to the view menu have been fixed.

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jkesler
jkesler
May 27 2016
1.3
5.0
May 27 2016
5.0
Version: 1.3
Works great :) Can copy and paste back and forth from photoshop as part of a design workflow. Very pleasant dithering results.
Bottacco
Bottacco
Apr 30 2015
1.3
5.0
Apr 30 2015
5.0
Version: 1.3
Good quality results and batch processing is a live saver… and it still works like a charm under Yosemite!
Guest
Guest
Feb 22 2011
1.3
5.0
Feb 22 2011
5.0
Version: 1.3
Simple, easy in use and fast!
Moog-Modular
Moog-Modular
Oct 8 2008
1.2
0.0
Oct 8 2008
0.0
Version: 1.2
I use vers 1.1 to convert photos to b/w laser engravings. But my laser app reads only pict files, not pngs. So while I appreciate the continued work on this application, it just upgraded itself out of my ability to use it.
Garlicbreath
Garlicbreath
May 1 2008
1.2
0.0
May 1 2008
0.0
Version: 1.2
Used to be able to select black and white as the color space for the saved file, which saved about half the file size when saving as PNG. Better for emailing. Now files are saved as 32-bit/millions of colors. Can this be changed?
Dalahast
Dalahast
Mar 2 2008
1.2
5.0
Mar 2 2008
5.0
Version: 1.2
YES YES YES! I used HyperDither when it first came out and I've been waiting and waiting for an update, thanks much!
macroxx-ultra
macroxx-ultra
Oct 7 2007
1.1
0.0
Oct 7 2007
0.0
Version: 1.1
This is a great program with very nice results and I hope, that "The Future" features, which are mentioned in the ReadMe file are going to be implemented soon. :-)
Dlwormwood
Dlwormwood
Aug 14 2006
1.0.1
4.5
Aug 14 2006
4.5
Version: 1.0.1
Man, the nostalgia that this app brings back is luciously painful. HyperCard was what attracted me to the Mac in the first place, and I really missed the culture the Macsphere had in those days. This app perfectly recaptured the "monochrome" asethetic that early Mac apps had. I can see this app used to make web pages and Flash apps to reclaim the 1-bit retro look.
Ancientyger
Ancientyger
Aug 13 2006
1.0.1
3.8
Aug 13 2006
3.8
Version: 1.0.1
It's pretty fast, at least on smaller images. I wish this were an Image Unit for Core Image aware applications, with advanced controls. This would, then, be amazing.
Suzres
Suzres
Aug 13 2006
1.0.1
4.5
Aug 13 2006
4.5
Version: 1.0.1
very nice, simple, robust. It is a pleasure to find again the very subtil black and white of Atkinson algorythm.
Pecos-Pete
Pecos-Pete
Aug 12 2006
1.0.1
4.3
Aug 12 2006
4.3
Version: 1.0.1
For a first run very good results, so far I'm pleased. Quick & easy, no mumbo jumbo.
Free
4.7
0.0
App requirements: 
  • Intel 32
  • PPC 32
  • Mac OS X 10.3.9 or later
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