chromatic_aberration — GFX2D post op

• Data kinds: rgb → rgb

• Call: import gfx2d; gfx2d.chromatic_aberration(rgb, strength=0.003, interp='bilinear') (or opsgfx2d.get("chromatic_aberration"))

Usage

Scale the red and blue channels about the image centre, green fixed.

Lateral chromatic aberration: red is magnified by `1 + strength`, blue by

`1 - strength. strength=0` samples the exact pixel centres and returns

the input to within 1e-15, which the suite checks.

Negative `strength` swaps which channel spreads outward — allowed, since

which way a real lens disperses depends on the glass.

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• gfx2d_scene — py -3.11 examples/gfx2d_scene.py

Ops the type connects to (they accept rgb as input)

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

Same category (post)

bloom · vignette · film_grain · color_lut · color_grade · dither · palette_quantize

*Provenance: gfx2d.py — GFX2D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

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