raw_dead_pixel_mask — GFX2D isp op

• データ種: image2d → image2d

• 呼び出し: import fullseye as fs; fs.ledger.raw_dead_pixel_mask(raw, threshold=0.1) (実装を直接呼ぶなら import gfx2d; gfx2d.raw_dead_pixel_mask(raw, threshold=0.1)、台帳から引くなら opsgfx2d.get("raw_dead_pixel_mask"))

使い方

Where the dead (stuck / hot) pixels are: `1.0` at a pixel that differs

from every one of its 8 same-colour neighbours by more than *threshold*

in the same direction, `0.0 elsewhere. (H, W)` float64.

"Every neighbour, same sign" is what separates a defect from an edge: at an

edge some same-colour neighbours are on the pixel's own side. The rule is

the one openISP documents for its DPC stage; here it is pattern-free

because same-colour neighbours are simply the pixels two steps away.

Ground truth: dead pixels planted in a smooth frame are recovered exactly

(no misses, no false alarms) while a hard edge produces none.

Raises `ValueError: bad *raw* or a *threshold* outside (0, 1]`.

参考(サンプルデータ・文献)

• 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。

実行できる例(この op を実際に呼ぶ検証済みサンプル)

• raw_to_display_isp — py -3.11 examples/raw_to_display_isp.py

型が繋がる次の op(image2d を入力に取れる)

shadow_cast_2d · dither · raw_black_level · raw_dead_pixel_correct · lens_shading_gain · lens_shading_correct · raw_apply_gains · raw_demosaic_bilinear

同カテゴリ(isp)

raw_black_level · raw_dead_pixel_correct · lens_shading_gain · lens_shading_correct · awb_gains · 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.