Icon of program: HyperDither

HyperDither for Mac

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Key Details of HyperDither

  • convert images to 1-bit using the HyperCard algorithm
  • Last updated on 5/20/2016
  • There have been 5 updates
  • Virus scan status:

    Clean (it's extremely likely that this software program is clean)


Developer's Description

convert images to 1-bit using the HyperCard algorithm
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 Macintosh, Bill Atkinson (of HyperCard, QuickDraw, MacPaint & now nature photography fame) discovered a very elegant dithering filter to convert greyscale image data for 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 routine was implemented as an option in Apple's long-gone 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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Full Specifications

GENERAL
Release
May 20, 2016
Latest update
May 20, 2016
Version
1.4.1
OPERATING SYSTEMS
Platform
Mac
Operating System
Mac OS X, Mac OS X 10.4, Mac OS X 10.3.9, Mac OS X 10.5, Mac OS X 10.3
Additional Requirements
None
POPULARITY
Total Downloads
674
Downloads Last Week
0
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User Reviews

4.5/5

2 User Votes