[IEICE paper] Dynamic Range Compression for Chromatic Lights

有彩色照明シーンの色情報を考慮したダイナミックレンジ圧縮

Dynamic Range Compression for Chromatic Lights

久保雄登 YutoKUBO,神納貴生 TakaoJINNO,栗山繁 ShigeruKURIYAMA



σs=7.1σs=28.5σs=456

σs=7.1σs=28.5σs=456

σr=0.016

 

σr=0.2

 

σr=0.5

 

σr=2.0

 

図1 赤色シーンへの適用結果(照明色:x=0.62, y=0.33 [CIExy])

Fig.1 Range compression examples for red lighting scene





σs=7.1σs=28.5σs=456

σs=7.1σs=28.5σs=456

σr=0.016

 

σr=0.2

 

σr=0.5

 

σr=2.0

 

図2 緑色シーンへの適用結果(照明色:x=0.40, y=0.48 [CIExy])

Fig.2 Range compression examples for green lighting scene





σs=7.1σs=28.5σs=456

σs=7.1σs=28.5σs=456

σr=0.016

 

σr=0.2

 

σr=0.5

 

σr=2.0

 

図3 青色シーンへの適用結果(照明色:x=0.21, y=0.11 [CIExy])

Fig.3 Range compression examples for blue lighting scene





(a) red light scene (b) green light scene (c) blue light scene

図6 従来手法(iCAM06[6])でのレンジ圧縮結果例

Fig.6 Range compression examples with iCAM06





(a) Reinhard2012[13] (b) iCAM06[6] (c) ours (d) ours (α=0.2)
(e) Reinhard2012[13] (f) iCAM06[6] (g) ours (h) ours (α=0.2)
(i) Reinhard2012[13] (j) iCAM06[6] (k) ours (l) ours (α=0.2)
(m) Reinhard2012[13] (n) iCAM06[6] (o) ours (p) ours (α=0.2)

図10 一般的なシーンに対するレンジ圧縮結果

Fig.10 Range compression examples for common scenes