function op• 資料種類:signal → indices
• 呼叫: import fullseye as fs; fs.ledger.zero_crossings_funct_1d(y)(要直接呼叫實作,import funct1d; funct1d.zero_crossings_funct_1d(y);從台帳取用則 ops1d.get("zero_crossings_funct_1d"))
> 該運算子的說明尚無譯文,以下照原文給出。
Indices where the function changes sign (HALCON zero_crossings_funct_1d).
Returns the integer indices i with sign(y[i]) * sign(y[i+1]) < 0 — the sample *before* each crossing. An empty input returns an empty index array (degenerate case, not an error).
Honest limitation: the test is a strict sign product, so a crossing that lands exactly on a zero sample ([-1, 0, 1]) is *not* reported, nor is a touch of zero without a sign change ([1, 0, 1]).
:param y: 1-D function (may be empty). :returns: int index array (possibly empty). :raises ValueError: non-1-D / NaN / Inf input.
• 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。
• signal_funct1d — py -3.11 examples/signal_funct1d.py
indices 作為輸入)function)create_funct_1d_array · create_funct_1d_pairs · smooth_funct_1d_gauss · smooth_funct_1d_mean · derivate_funct_1d · integrate_funct_1d · local_min_max_funct_1d · abs_funct_1d
*Provenance: funct1d.py — ONED 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.