fullseye

film_grain — GFX2D post op

使い方

Add zero-mean Gaussian grain, deterministically from seed.

monochrome adds the same noise to all three channels (what film grain does — the silver halide crystal is not coloured); set it false for sensor read noise, which is per-channel.

sigma=0 returns the input bit for bit. The clip at [0, 1] biases the mean wherever the image is already near an end of the range; the suite measures the shift (2.4e-4 on a mid-grey image at sigma=0.03, 1.0e-4 on a half-black half-white one) rather than claiming it is zero.

参考(サンプルデータ・文献)

実行できる例(この op を実際に呼ぶ検証済みサンプル)

型が繋がる次の op(rgb を入力に取れる)

srgb_to_linear · linear_to_srgb · blend_mode · light_mask · normal_map_decode · bloom · vignette · chromatic_aberration

同カテゴリ(post)

bloom · vignette · chromatic_aberration · color_lut · color_grade · dither · palette_quantize


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.