raw_black_level — GFX2D isp op

• 数据种类:image2d → image2d

• 调用: import fullseye as fs; fs.ledger.raw_black_level(raw, offsets, white=1.0, pattern='RGGB')(要直接调用实现,import gfx2d; gfx2d.raw_black_level(raw, offsets, white=1.0, pattern='RGGB');从台账取用则 opsgfx2d.get("raw_black_level"))

用法

Bayer 帧的黑电平校正:逐通道 (raw − offset) / (white − offset)。

> 以下的详细说明为原文 —— 摘要与标题已翻译。

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*.

参考(示例数据・文献)

• 示例数据目录(下载 URL / 许可证) —— 2-D 用 skimage.data(BSD/公有领域)加合成图,3-D 给出真实数据源(Stanford/PDS 等)的下载 URL。

• 算子来历与参考文献 —— 该算子族所依据的研究/方法出处。

• 算法的正典(作者・年份)与用途见上面的族使用指南。

可运行的示例(实际调用该算子并已验证的样例)

• raw_to_display_isp — py -3.11 examples/raw_to_display_isp.py

类型可衔接的下一个算子(可接受 image2d 作为输入)

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

同类别(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 算子登记表。本条目由 tools/opdocs.py md 自动生成(请勿手工编辑)。*

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