HyperDither
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(7) 4.571428571428571

Convert images to 1-bit black and white.   Free
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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
What's New
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.
Requirements
Intel/PPC, Mac OS X 10.3 or later



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HyperDither User Discussion (Write a Review)
ver. 1.x:
(7)
Your rating: Now say why...
Overall:
(7)

sort: smiles | time
burypromote
+1

Cooper_Stan reviewed on 22 Feb 2011
Simple, easy in use and fast!
[Version 1.3]


burypromote

+14
Moog modular commented on 08 Oct 2008
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.
[Version 1.2]

1 Reply

burypromote
+1

+45
Dalahast commented on 08 Oct 2009
You can convert it to PICT with another app. Preview will do just fine, open the file and use File > Save As… and choose PICT in the drop-down box.
burypromote
+1

+11
garlicbreath commented on 01 May 2008
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?
[Version 1.2]


burypromote
+1

+45

Dalahast reviewed on 01 Mar 2008
YES YES YES! I used HyperDither when it first came out and I've been waiting and waiting for an update, thanks much!
[Version 1.2]


burypromote
+1

+41
Macroxx commented on 07 Oct 2007
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.

:-)
[Version 1.1]


burypromote

+1

DLWormwood reviewed on 13 Aug 2006
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.
[Version 1.0.1]


burypromote

Ancientyger reviewed on 13 Aug 2006
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.
[Version 1.0.1]


burypromote

suzres reviewed on 13 Aug 2006
very nice, simple, robust.
It is a pleasure to find again the very subtil black and white of Atkinson algorythm.
[Version 1.0.1]


burypromote

Pecos Pete reviewed on 12 Aug 2006
For a first run very good results, so far I'm pleased. Quick & easy, no mumbo jumbo.
[Version 1.0.1]


There are currently no troubleshooting comments. If you are experiencing a problem with this app, please post a comment.


+4

spacestation rated on 19 Feb 2011

[Version 1.3]


Downloads:5,955
Version Downloads:3,589
Type:Multimedia Design : Image Editing
License:Free
Date:18 Feb 2011
Platform:PPC 32 / Intel 32 / OS X
Price:Free0.00
Overall (Version 1.x):
Features:
Ease of Use:
Value:
Stability:
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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!


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