stroke_resample_closed — PRINTPATH stroke op

• Data kinds: pairs → pairs

• Call: import fullseye as fs; fs.ledger.stroke_resample_closed(points, n_points, allow_shortening=False) (to call the implementation directly, import printpath; printpath.stroke_resample_closed(points, n_points, allow_shortening=False); from the registry, opsprintpath.get("stroke_resample_closed"))

Usage

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

閉じた線を等弧長に打ち直す。→ `pairs`

フーリエへ渡す前段。★媒介変数の取り方で係数が変わる(実測で最大 47 倍)ので、

ここは弧長で等間隔と明示する。弧長の間隔は機械精度で一定(実測 cv 1e-14)。

★ただし打ち直すと線は短くなる: 標本と標本を結ぶのは弦なので、折れ点で角を

切る。実測(300 頂点の巡回路): 標本 4000 で長さ 99.1 %、1024 で 96.9 %、

300(頂点と同数)で 89.3 %、100 で 72.8 %、50 で 57.7 %。長さが変われば

濃淡の再現も壊れるので、入力の頂点数より少ない標本は既定で拒否する

(意図してならば `allow_shortening=True`)。

Detailed usage guide

• printpath 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_one_stroke_epicycles — py -3.11 examples/poc_one_stroke_epicycles.py

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

stipple_energy · stroke_tour_closed · mst_length · stroke_tone_error · mosaic_tiles_render

Same category (stroke)

stipple_points_from_image · stipple_energy · stroke_tour_closed · mst_length · stroke_tone_error

*Provenance: printpath.py — PRINTPATH 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.