(7)
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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 Macintosh, 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
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 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
PPC / Intel, Mac OS X 10.3 or later
PPC / Intel, Mac OS X 10.3 or later
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HyperDither User Discussion (Write a Review)
Overall:
(7)
(7)
| Downloads:5,313 |
| Version Downloads:2,947 |
| Type:Multimedia & Design : Image Editing |
| License:Free |
| Date:18 Feb 2011 |
| Platform:PPC / Intel |
| Price:Free |
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 Macintosh, 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!
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 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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Cooper_Stan reviewed on 22 Feb 2011
+2
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.
+1
+20
+9
+20
dalahast reviewed on 01 Mar 2008
+1
+41
:-)
+1
DLWormwood reviewed on 13 Aug 2006
Ancientyger reviewed on 13 Aug 2006
suzres reviewed on 13 Aug 2006
It is a pleasure to find again the very subtil black and white of Atkinson algorythm.
Pecos Pete reviewed on 12 Aug 2006
+3
spacestation rated on 19 Feb 2011