npr op• 資料種類:image2d → pairs
• 呼叫: import fullseye as fs; fs.ledger.mosaic_tiles_sites(image, n_tiles=400, iterations=12, seed=0, weighted=True)(要直接呼叫實作,import printpath; printpath.mosaic_tiles_sites(image, n_tiles=400, iterations=12, seed=0, weighted=True);從台帳取用則 opsprintpath.get("mosaic_tiles_sites"))
在影像上執行的 Lloyd 迭代 —— 馬賽克的磁磚中心。
> 以下的詳細說明為原文 —— 摘要與標題已翻譯。
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.
• 範例資料目錄(下載 URL / 授權) —— 2-D 用 skimage.data(BSD/公有領域)加合成圖,3-D 給出真實資料源(Stanford/PDS 等)的下載 URL。
• 運算子來歷與參考文獻 —— 該運算子族所依據的研究/方法出處。
• 演算法的正典(作者、年份)與用途見上面的族使用指南。
• poc_beats_fringes_and_screens — py -3.11 examples/poc_beats_fringes_and_screens.py
pairs 作為輸入)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 運算子登記表。本條目由 tools/opdocs.py md 自動產生(請勿手動編輯)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.