Buzz Andersen
Cool app that replicates the elegant 1 bit image dithering routine Bill Atkinson used in HyperCard: http://john.tinrocket.com/hyperdither/ /ht @uliwitness
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@cabel@buzz@uliwitness "CIFilter: apply is unavailable" – custom kernels on iOS can be compiled but not applied to an image. Damn.
Count Franken
Cabel Sasser
Wil Shipley@chockenberry @cabel @buzz @uliwitness I just talked with Atkinson yesterday and told him his dithering is in the Accelerate framework.
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@wilshipley@cabel@buzz@uliwitness Somewhere in vImage to convert RGBA to indexed color? - View other replies
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@chockenberry@cabel@buzz@uliwitness kvImageConvert_DitherAtkinson - View other replies
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@wilshipley@cabel@buzz@uliwitness "Atkinson dithering is applied to the image, for the old timers." -
@chockenberry@wilshipley@cabel@buzz@uliwitness I was a little bit surprised that no one called it out when it went through API review. -
@chockenberry@wilshipley@cabel@buzz@uliwitness Sadly, error diffusion dithering is almost by definition unvectorizeable. - View other replies
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@stephentyrone@wilshipley@cabel@buzz@uliwitness Yep, about 15 minutes after creating Atkinson.cikernel I understood the problem :-) -
@chockenberry@stephentyrone@wilshipley@cabel@buzz Now: Come up with an algorithm that looks similar, but can be parallellized. - View other replies
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Ghoulie Ghost Terror
Jens Ayton
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