alife_dla — 2D `artificial-life` op

• Data kinds: image → image

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

Usage

Deterministic diffusion-limited-aggregation (DLA) growth proxy.

Witten-Sander DLA grows a cluster by releasing random walkers that stick on

contact; the walker density obeys a Laplace equation, so this op replaces the

random walkers by their *deterministic* mean field: the unclaimed image

brightness is diffused with a Gaussian Green's function to give a

concentration u, and each generation the cluster's Moore boundary attaches

exactly those cells whose concentration clears a stickiness threshold

(with the single strongest boundary cell always attaching, so growth never

stalls). Bright pixels (>= 0.75 of the image maximum, or the single brightest

pixel) are the seed. `a` sets the number of growth generations

1 + int(11a), `b` the stickiness: high b selects only the highest-

concentration tips (dendritic, screened growth), low b attaches nearly the

whole boundary (compact, Eden-like growth). Returns the 0/1 cluster.

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.

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_cyclic_ca · alife_perona_malik · alife_curvature_flow · 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_dla — 2D artificial-life op