HyperDither For Mac Publisher's description
HyperDither is an OS X image processing utility that converts color or grayscale images to 1 bit black & white ...
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 вЂњAtkinsonвЂќ 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 вЂњError-diffusionвЂќ filter (used by QuickTime, PhotoShop).
The dither routine was implemented as an option in AppleвЂ™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 вЂ” but not forgotten! I was able to email Bill Atkinson in January, 2003 and inquire about the details of the algorithm and he was kind enough to respond with a brief write up of the routine.
To process an image with HyperDither, just drag & drop or copy & paste the image into the HyperDitherвЂ™s main window. You can then save it to disk or copy it back to the clipboard.
To batch-process a folder of images, just drag the folder into HyperDitherвЂ™s main window.
What's New in This Release:* 12.5%, 25% & 50% reduced views
* Optimized PNG export -- tiny, loss-less files!
* Several redraw bugs related to the view menu have been fixed.
System Requirements:PPC / Intel, Mac OS X 10.3 or later
Program Release Status: Minor Update
Program Install Support: Install and Uninstall