{"ok":true,"trend":{"id":450624,"platform":"hn","region":"global","key":"show hn: using 2d dft, dithering, etc. to maximize eink manga image quality","title":"Show HN: Using 2D DFT, dithering, etc. to maximize eInk manga image quality","url":"https://github.com/ciromattia/kcc","first_seen":"2026-09-30T06:20:39.752673Z","last_seen":"2026-09-30T09:20:39.640662Z","last_rank":28,"peak_rank":3,"last_volume":22,"peak_volume":22,"seen_count":12,"score":49.3,"category_hint":"oceans","section":"business","category":"retail","summary":"A developer has shared a technique that applies a 2D discrete Fourier transform, dithering and related image processing to optimize manga pages for eInk e-readers. The work is available on GitHub under the Kindle Comic Converter project, which converts comics and manga for low-power e-ink displays. Readers and developers are discussing how signal processing can sharpen grayscale artwork on hardware with limited color and contrast.","why":"The project was featured on Hacker News, drawing attention from e-reader enthusiasts and developers interested in image processing.","tone":"neutral","entities":["Kindle Comic Converter","ciromattia","GitHub","eInk e-readers"],"summarized_at":"2026-09-30T06:21:32.389031Z","meta":{"via":"scan","lang":"en","link":"https://github.com/ciromattia/kcc","term":"sea level","hn_id":"49879758","comments":4},"nw":null,"promo":null,"kind":null,"importance":null,"hidden":false,"hide_reason":null,"judged_at":null,"title_en":"Tool uses 2D DFT and dithering to improve eInk manga quality","section_name":"Business","category_name":"Retail","timeline":[{"captured_at":"2026-09-30T06:20:39.752673Z","rank":30,"volume":4},{"captured_at":"2026-09-30T06:35:39.599915Z","rank":30,"volume":4},{"captured_at":"2026-09-30T07:05:39.659450Z","rank":30,"volume":8},{"captured_at":"2026-09-30T07:20:39.671110Z","rank":28,"volume":9},{"captured_at":"2026-09-30T07:20:45.189029Z","rank":9,"volume":10},{"captured_at":"2026-09-30T07:42:45.409235Z","rank":3,"volume":11},{"captured_at":"2026-09-30T07:50:39.667233Z","rank":30,"volume":12},{"captured_at":"2026-09-30T08:20:39.703617Z","rank":29,"volume":15},{"captured_at":"2026-09-30T08:35:39.740869Z","rank":28,"volume":16},{"captured_at":"2026-09-30T08:42:45.189455Z","rank":9,"volume":16},{"captured_at":"2026-09-30T08:50:39.678583Z","rank":29,"volume":17},{"captured_at":"2026-09-30T09:04:45.391927Z","rank":3,"volume":19},{"captured_at":"2026-09-30T09:05:39.632261Z","rank":29,"volume":19},{"captured_at":"2026-09-30T09:20:39.640662Z","rank":28,"volume":22}],"posts":[{"platform":"hn","url":"https://news.ycombinator.com/item?id=49879758","author":"seam_carver","title":"Show HN: Using 2D DFT, dithering, etc. to maximize eInk manga image quality","snippet":null,"posted_at":"2026-09-28T15:39:42Z","likes":22}],"elsewhere":[],"window":"7d"}}