Show HN: Using 2D DFT, dithering, etc. to maximize eInk manga image quality
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Show HN: Using 2D DFT, dithering, etc. to maximize eInk manga image quality
Unofficial Hacker News client; not affiliated with Y Combinator.
seam_carver · · focus · HN ↗
1) filesize optimization. Think 600 to 100 mb after optimization per volume depending on source and settings. Does it by downscaling and dithering from 256 to 16 shades of gray (e.g. 8 bit to 4 bit)
2) black level correction. You need pure blacks in eink. Dark gray looks ok on paper and normal screens but not eink. Does it with histogram manipulation
3) semi automatic 2 page spread joining. spreads can be autorotated or not.
4) rainbow removal on kaleido 3 color eink with 2D discrete Fourier transform