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. 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. The image was dithered by the beautiful HyperDither. The visual effect produced by this technique creates rich, velvety tones, and is higher-quality than the Diffusion Dither method offered by 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. The treatment of the image above, The Flute Concert of Sanssouci by Adolph Menzel, has been treated with a Hyperdither algorithm first developed for. This room is where I recorded all the songs that dont have Jam in the title. HyperDither uses an elegant color reduction (dithering) routine to turn color or grayscale images into black and white or grayscales. 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). 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. Specifically, HyperDither implements the "Atkinson" dithering filter. If HyperDither suits you, get the 4.11 MB app for 2.0.3 on PC.HyperDither is an OS X image processing utility that converts color or grayscale images to 1 bit black & white using a sophisticated dithering routine. HyperScan and the excellent Atkinson dithering routine were subsequently unavailable for many years-but not forgotten!įrom Tinrocket, award-winning creator of apps to inspire creativity: Waterlogue, This by Tinrocket, and Olli by Tinrocket. Later, this graphics routine was implemented as an option in Apple’s HyperScan software, connecting early Macs to flatbed scanners, and nowhere else. The software is categorized as Design & Photo Tools. In the early 1980s, while developing the graphics technology for the first Macintosh, Bill Atkinson (HyperCard, QuickDraw, MacPaint) discovered a very elegant filter to convert greyscale image data for display on the Mac's 1-bit black-and-white screen. The visual effect produced by this technique creates rich, velvety tones, and is higher-quality than the “Diffusion Dither” method offered by Photoshop. this app uses an elegant color reduction (dithering) routine to turn color or grayscale images into black and white or grayscales. It can turn color images into monochrome ones quite effectively. Discovering the right Photo & Video app for your needs is hard, which is why we are happy to give you HyperDither from Tinrocket, LLC. HyperDither Another option for Mac OSX users is a free application called HyperDither. HyperDither uses an elegant color reduction (dithering) routine to turn color or grayscale images into black and white or grayscales.
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