hue_saturation — GFX2D `isp` op

• Data kinds: rgb → rgb

• Call: import fullseye as fs; fs.ledger.hue_saturation(rgb, hue_deg=0.0, saturation=1.0) (to call the implementation directly, import gfx2d; gfx2d.hue_saturation(rgb, hue_deg=0.0, saturation=1.0); from the registry, opsgfx2d.get("hue_saturation"))

Usage

Rotate the hue by *hue_deg* and scale the saturation by *saturation*, in BT.601 YCbCr: luma is kept, the chroma vector `(Cb, Cr) is rotated and scaled. Output clipped to [0, 1]`.

Ground truth: `hue_deg=0, saturation=1` is the identity to 1e-15;

rotating by `+t then -t returns the input; saturation=0` gives a

grey image whose value is the BT.601 luma of the input. A hue rotation is

not a channel permutation (120 degrees does not swap R->G->B exactly),

because the RGB cube is not a cylinder around the grey axis — said here so

nobody tests for it.

Raises `ValueError`: non-finite *hue_deg*, or *saturation* < 0.

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)

• raw_to_display_isp — py -3.11 examples/raw_to_display_isp.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 · chromatic_aberration

Same category (`isp`)

raw_black_level · raw_dead_pixel_mask · raw_dead_pixel_correct · lens_shading_gain · lens_shading_correct · awb_gains · rgb_apply_gains · raw_apply_gains

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

hue_saturation — GFX2D isp op