Source of YIQ

[[ColorSpace]]

- 表色系
--  http://www.triplefalcon.com/Lexicon/Color-Space-1.htm


** color difference [#colordiff]
- Measuring perceived color difference using YIQ NTSC transmission color space in mobile applications
-- http://www.progmat.uaem.mx:8080/artVol2Num2/Articulo3Vol2Num2.pdf

*** 実装 [#wdd40769]

-  https://github.com/dmtrKovalenko/odiff