alife_cyclic_ca — 2D `artificial-life` op

• Data kinds: image → image

• Call: fullseye.apply(img, "alife_cyclic_ca", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])

alife_cyclic_ca: 入力 → 出力

*The figure is the real output on a synthetic 128×128 input. Left: input, right: output (a non-image return value is shown as the value itself).*

Usage

Cyclic cellular automaton (Fisch-Gravner-Griffeath) -> spiral waves.

The image is quantised into N = 3 + int(9a) cyclically ordered states; a cell

in state s advances to (s+1) mod N as soon as at least one of its 8 Moore

neighbours already holds (s+1) mod N ("eat-the-next-colour"). Repeated on the

torus this self-organises the initial field into rotating spiral waves and

demons. `a sets the state count N, b` the step count 1 + int(15b).

Returns state/(N-1) so the full [0,1] range is used.

Detailed usage guide

• gallery2d_physics_alife_3d family guide

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.

Try it in Studio

The program below has been verified to run (same input as the figure). In Studio's help this block becomes buttons that load and run it on the spot.

alife_cyclic_ca 0.50 0.50

▸ Load this pipeline · Load & run

Runnable examples (verified samples that actually call this op)

• gallery2d_physics_alife_3d — py -3.11 examples/gallery2d_physics_alife_3d.py

• sim2real_and_alife — py -3.11 examples/sim2real_and_alife.py

Ops the type connects to (they accept `image` as input)

identity · gaussian · mean_box · bilateral · unsharp · median · min_filter · max_filter

Same category (`artificial-life`)

alife_gray_scott · alife_turing · alife_life_step · alife_perona_malik · alife_curvature_flow · alife_dla · alife_reaction_bz · alife_wolfram1d

*Provenance: ops.py — 2D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

alife_cyclic_ca — 2D artificial-life op