A small freedom area.


Understanding selective coloring in Adobe Photoshop

Sat 07 Jan 2017

Photoshop has many interesting color filters, most of them being perfidiously documented such that you can understand how to use...

ffmpeg, reverse, algo, av

Butchering HQX scaling filters

Sat 21 Jun 2014

The [HQX filters][wphqx], namely hq2x, hq3x and hq4x, are well-known pixel art scalers. They are mainly used by old console...

algo, prog, reverse, fun, av, ffmpeg

Fun and canny optim for a Canny Edge Detector

Sat 08 Sep 2012

The *canny edge detector* is likely the most commonly implemented edge detection algorithm. It's generally a nice filter to write...

fun, trick, prog, algo, ffmpeg, av

DLX and reduced memory footprint

Tue 13 Mar 2012

The Dancing Links algorithm from [Donald Knuth][1] is a well-known method used to solve sudokus (and various other fun things...

prog, memory, algo