perpetual_loop — GENERATIVE loop op

• Data kinds: none → rgbvideo (an op determined by its arguments alone — it takes no image or data input)

• Call: import fullseye as fs; fs.ledger.perpetual_loop(kind: 'str' = 'harmonograph', frames: 'int' = 48, size: 'int' = 360, seed: 'int' = 0) -> 'np.ndarray' (to call the implementation directly, import perpetual; perpetual.perpetual_loop(kind: 'str' = 'harmonograph', frames: 'int' = 48, size: 'int' = 360, seed: 'int' = 0) -> 'np.ndarray'; from the registry, opsgenerative.get("perpetual_loop"))

Usage

> This operator's description has not been translated yet. The original text follows as it is.

継ぎ目の無い循環動画を作る → `rgbvideo` (T,H,W,3)。

★循環を「最後に頭へ戻す」で作らない。時間依存の量をすべて θ の関数に

して θ = 2πt/T を回すと、t = T は t = 0 と同じ式になる —— つまり継ぎ目は

最初から存在しない。これは編集で消す種類のものではなく、構成から従う。

:func:perpetual_loop_seam がその継ぎ目を数で出す(厳密に 0 になる)。

`frames` コマ返す(t = 0 .. T-1)。t = T は t = 0 と一致するので含めない。

Detailed usage guide

• generative_art 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)

• poc_illusions_and_perpetual_drawing — py -3.11 examples/poc_illusions_and_perpetual_drawing.py

• poc_periodic_video_boundary — py -3.11 examples/poc_periodic_video_boundary.py

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

perpetual_loop_seam

Same category (loop)

perpetual_loop_seam


*Provenance: perpetual.py — GENERATIVE 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.