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A comment on Show HN: A 13.3" battery-powered e-paper picture frame to display digital art. Parent comment

Re:Show HN: A 13.3" battery-powered e-paper picture frame to... by clash on Tuesday June 29, 2021 @08:04PM (#27683383)
I actually have an Inkplate at home. The 8 gray shades they support are unfortunately not evenly distributed, which makes it difficult to display images in good quality.

EPDiy looks interesting, though.

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Re:Show HN: A 13.3" battery-powered e-paper picture frame to... by KMnO4 on Tuesday June 29, 2021 @11:16PM (#27684460)
What does it do for shades that aren’t those 8? Does it apply any sort of dithering?

Maybe it just needs a better lookup table or some preprocessing.

I’ve seen some impressive 1-bit displays, so 8 shades shouldn’t be harder than that.

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Re:Show HN: A 13.3" battery-powered e-paper picture frame to... by clash on Wednesday June 30, 2021 @01:39PM (#27691354)
You can't define more than 8. The API allows only 3 bit input. I also tinkered with the lookup table, and was able to create a lot of different gray shades, but I was not able to produce ~40-60% gray.
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