isp op• データ種: rgb → vector
• 呼び出し: import fullseye as fs; fs.ledger.awb_gains(rgb, method='gray_world', percentile=99.0) (実装を直接呼ぶなら import gfx2d; gfx2d.awb_gains(rgb, method='gray_world', percentile=99.0)、台帳から引くなら opsgfx2d.get("awb_gains"))
Estimate white-balance gains `(g_R, g_G, g_B) with g_G = 1`.
`method="gray_world": the scene averages to grey, so `g_c = mean_G /
mean_c` (Buchsbaum, 1980). method="white_patch"`: the brightest
surfaces are white, so `g_c = P_G / P_c with P` the *percentile*
(default 99, i.e. not the single hottest pixel) of each channel. Both are
closed forms; neither is right for every scene (a red wall breaks
gray-world, a coloured light breaks white-patch) and the docstring says so
rather than picking one silently. Apply with :func:rgb_apply_gains or,
on the mosaic, :func:raw_apply_gains.
Ground truth: after applying gray-world gains the three channel means are
equal to 1e-12; after white-patch gains the three percentiles are equal.
Raises `ValueError`: unknown *method*, a channel whose statistic is 0
(no gain can be defined), or a *percentile* outside `(0, 100]`.
• 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。
• raw_to_display_isp — py -3.11 examples/raw_to_display_isp.py
vector を入力に取れる)rgb_apply_gains · raw_apply_gains
isp)raw_black_level · raw_dead_pixel_mask · raw_dead_pixel_correct · lens_shading_gain · lens_shading_correct · rgb_apply_gains · raw_apply_gains · raw_demosaic_bilinear
*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.