eInk

A developer has shared a method for improving how manga looks on eInk readers, combining 2D discrete Fourier transform filtering with dithering and related image-processing tricks. The approach, released via the open-source Kindle Comic Converter project on GitHub, aims to sharpen lines and grayscale shading on low-contrast e-ink screens. Hackers are discussing the signal-processing details and how well the results compare to standard conversion pipelines.