signal op• 数据种类:signal → measurement
• 调用: import fullseye as fs; fs.ledger.zero_crossing_rate(x)(要直接调用实现,import dsp; dsp.zero_crossing_rate(x);从台账取用则 ops1d.get("zero_crossing_rate"))
相邻样本中符号改变的比例——廉价的音高/噪声程度线索。
> 以下的详细说明为原文 —— 摘要与标题已翻译。
Exact zeros are neither a crossing nor a sign: a crossing is counted only when the sign changes between consecutive *non-zero* samples, and the rate divides by the number of adjacent sample pairs len(x) - 1. So [1, 0, 1, 0, 1] is 0.0 and [1, 0, -1] is 0.5 (before 2026-09-02 diff(sign(x)) counted every touch of zero as a crossing: 1.0 for both).
Empty input (x with 0 elements) raises ValueError.
• 示例数据目录(下载 URL / 许可证) —— 2-D 用 skimage.data(BSD/公有领域)加合成图,3-D 给出真实数据源(Stanford/PDS 等)的下载 URL。
• 算子来历与参考文献 —— 该算子族所依据的研究/方法出处。
• 算法的正典(作者、年份)与用途见上面的族使用指南。
• gallery_oned_audio_funct — py -3.11 examples/gallery_oned_audio_funct.py
• gallery_spectrum_signal_bridge — py -3.11 examples/gallery_spectrum_signal_bridge.py
measurement 作为输入)—
signal)lowpass · highpass · bandpass · envelope · rms · local_std · quantize · companding_mu_law
*Provenance: dsp.py — ONED 算子登记表。本条目由 tools/opdocs.py md 自动生成(请勿手工编辑)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.