Convert photos to Atkinson dithering
gazs.github.io
Convert photos to Atkinson dithering
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Re: Convert photos to Atkinson dithering
#2Still my favorite B&W dither algorithm.
The university had a B&W flatbed scanner attached to a Mac running ... a Hypercard stack? that allowed you to scan an image and get a B&W image.
A clipart book I picked up from the college bookstore and a quick scan and I had a "logo" for the Mac shareware games I started writing in 1988 or so.
At the time I didn't;t realize how really ... nice .. Atkinson's algorithm is. But when, later, I tried dithering with other algos I saw how nice the diffusion was in Bill's code.
More recently I was playing with an eInk calendar project and wanted an "Atkinson-esque" series of images of the Moon in various phases. So I found a site very like the linked one to Atkinson-dither the moon photos I found [1].
[1] see the moon in screenshot: https://github.com/EngineersNeedArt/SystemSix/blob/10f2332b5...
Re: Convert photos to Atkinson dithering
#3Is it the same Atkinson that died today and is this a tribute ?
Re: Convert photos to Atkinson dithering
#4Is it the same Atkinson that died today and is this a tribute ?
Yes, he invented* the algorithm. One assumes it must be.
* Corrected from 'discovered;' see below.
Re: Convert photos to Atkinson dithering
#5The implementation is excellent, and could be slightly improved by giving a default name and .png extension to the downloaded file, by passing a value to the "download" property on the anchor. See https://developer.mozilla.org/en-US/docs/Web/API/HTMLAnchorE...
Re: Convert photos to Atkinson dithering
#6If you want to do this in Python, there's:
Re: Convert photos to Atkinson dithering
#7Is it the same Atkinson that died today and is this a tribute ?
In a sense, but the first commit in the repository was 15 years ago - it's not something that someone whipped up in response to the news.
Re: Convert photos to Atkinson dithering
#8[deleted]
Re: Convert photos to Atkinson dithering
#9Is it the same Atkinson that died today and is this a tribute ?
Yes, he invented* the algorithm. One assumes it must be. * Corrected from 'discovered;' see below.
Invented the algorithm. The choice and arrangement of weights is a matter of fine-tuning to balance practical concerns - not some natural law of mathematics that could be figured out.
Re: Convert photos to Atkinson dithering
#10Earlier quoted context omitted.
Yes, he invented* the algorithm. One assumes it must be. * Corrected from 'discovered;' see below.
Invented the algorithm. The choice and arrangement of weights is a matter of fine-tuning to balance practical concerns - not some natural law of mathematics that could be figured out.
That's a good clarification