light op• データ種: rgb × rgb → rgb
• 呼び出し: import gfx2d; gfx2d.light_mask(base, light, ambient=0.0) (または opsgfx2d.get("light_mask"))
Modulate an `rgb image by an rgb light map: base * (ambient + light)`.
`ambient is the light that reaches everything; ambient=1` with a black
light map returns the base exactly, which is the identity the test suite
pins.
The product is clipped to `[0, 1]`; the clipped amount is not returned.
Both arguments should be in the same encoding — mixing an sRGB base with a
linear light map is the second silent-error trap of this family, and the
only defence is that both arguments are named.
• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。
• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。
• アルゴリズムの正典(著者・年)と用途は上記ファミリ使い方ガイドに記載。
• gfx2d_scene — py -3.11 examples/gfx2d_scene.py
rgb を入力に取れる)srgb_to_linear · linear_to_srgb · blend_mode · normal_map_decode · bloom · vignette · chromatic_aberration · film_grain
light)radial_light · normal_map_decode · normal_map_shade · shadow_cast_2d
*Provenance: gfx2d.py — GFX2D operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.