npr op• データ種: image2d → pairs
• 呼び出し: import fullseye as fs; fs.ledger.mosaic_tiles_sites(image, n_tiles=400, iterations=12, seed=0, weighted=True) (実装を直接呼ぶなら import printpath; printpath.mosaic_tiles_sites(image, n_tiles=400, iterations=12, seed=0, weighted=True)、台帳から引くなら opsprintpath.get("mosaic_tiles_sites"))
画像の上で回す Lloyd 反復 —— モザイクのタイル中心。
> 以下の詳細説明は原文のままです —— 要約と見出しは訳出済み。
Places *n_tiles* sites and moves each to the centroid of the pixels it owns,
weighted by local contrast when *weighted* (so detail gets smaller tiles).
★Why this earns its place: Lloyd's iteration is a descent — the
quantisation energy cannot increase — and that is a property of the algorithm,
not of the picture. The energy is *not* reported here on purpose: the existing
`stipple_energy` measures it from the sites, so the monotonicity can be
checked by an op that did not produce them. Measuring your own descent with
your own number proves nothing.
Returns `pairs`: the site coordinates (row, col).
Raises `ValueError`: fewer than 4 tiles or more tiles than pixels;
negative iterations; a non-finite or oversized image.
• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。
• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。
• アルゴリズムの正典(著者・年)と用途は上記ファミリ使い方ガイドに記載。
• poc_beats_fringes_and_screens — py -3.11 examples/poc_beats_fringes_and_screens.py
pairs を入力に取れる)stipple_energy · stroke_tour_closed · mst_length · stroke_resample_closed · stroke_tone_error · mosaic_tiles_render
npr)halftone_screen · halftone_moire_period · engrave_lines · hatch_field · mosaic_tiles_render
*Provenance: printpath.py — PRINTPATH operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.