raw_black_level — GFX2D isp op

• 資料種類:image2d → image2d

• 呼叫: import fullseye as fs; fs.ledger.raw_black_level(raw, offsets, white=1.0, pattern='RGGB')(要直接呼叫實作,import gfx2d; gfx2d.raw_black_level(raw, offsets, white=1.0, pattern='RGGB');從台帳取用則 opsgfx2d.get("raw_black_level"))

用法

Bayer 幀的黑電平校正:逐通道 (raw − offset) / (white − offset)。

> 以下的詳細說明為原文 —— 摘要與標題已翻譯。

A sensor's dark output is not zero (pedestal + dark current); every later

stage that multiplies (gains, CCM) would scale that pedestal into a colour

cast, so this runs first. *offsets* is a scalar, 3 values `(R, G, B)`

or 4 values `(R, G1, G2, B) in the same [0, 1]` units as *raw*; *white*

is the saturation level, so a pixel at *white* maps to exactly 1.

Ground truth: a frame built as `offset + k * signal` comes back as

`k * signal / (white - offset)` to 1e-15; a pixel at the offset maps to 0.

Raises `ValueError: non-finite input, an offset >= white`, or an

unknown *pattern*.

參考(範例資料・文獻)

• 範例資料目錄(下載 URL / 授權) —— 2-D 用 skimage.data(BSD/公有領域)加合成圖,3-D 給出真實資料源(Stanford/PDS 等)的下載 URL。

• 運算子來歷與參考文獻 —— 該運算子族所依據的研究/方法出處。

• 演算法的正典(作者・年份)與用途見上面的族使用指南。

可執行的範例(實際呼叫該運算子並已驗證的樣例)

• raw_to_display_isp — py -3.11 examples/raw_to_display_isp.py

型別可銜接的下一個運算子(可接受 image2d 作為輸入)

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

同類別(isp)

raw_dead_pixel_mask · 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 運算子登記表。本條目由 tools/opdocs.py md 自動產生(請勿手動編輯)。*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.