http://10.8.1.3/class/ 2026-08-10T20:00:24+00:00 http://10.8.1.3/class/ http://10.8.1.3/class/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2026-07-16T00:12:46+00:00 yuki (yuki@undisclosed.example.com) http://10.8.1.3/class/doku.php?id=numericalipb:lecture6&rev=1784160766&do=diff 【数値情報処理b】第6回 色空間 色と色空間 電磁波は電場と磁場が波として伝わるものである。 電磁波は波長によって性質が異なる。 電磁波のうち、380 nm から 770 nm あたりの波長が人間の眼に見える光で、$(R,G,B)$$[0,1]$\[ \begin{array}{ccccc} 青 && 黄 && 白\\ (0,0,1)&+&(1,1,0)&=&(1,1,1) \end{array} \]\[ \begin{array}{ccccc} 白 && 青 && 黄\\ (1,1,1)&-&(0,0,1)&=&(1,1,0) \end{array} \]$R, G, B$$[0,1]$$Y, C_{b}, C_{r}$$[0,255]$\begin{align*} r&=255R\\ g&=255G\\ b&=255B\\ Y&=\frac{66r+129g+25b+128}{256}+16\\ C_{b}&=\frac{-38r-74g+112b+128}{256}+128\\ C_{r}&=\frac{112r-94g-18b+128}{256}+128 \end{ali… text/html 2026-07-15T16:02:39+00:00 yuki (yuki@undisclosed.example.com) http://10.8.1.3/class/doku.php?image=numericalipb%3Ahsv_shift_h.png&ns=numericalipb&rev=1784131359&tab_details=history&media_do=diff&do=media 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