signal op• データ種: signal → table
• 呼び出し: import fullseye as fs; fs.ledger.signal_features(x, rate=1.0) (実装を直接呼ぶなら import dsp; dsp.signal_features(x, rate=1.0)、台帳から引くなら ops1d.get("signal_features"))
A compact acoustic/vibration feature vector for anomaly detection:
rms, peak, crest_factor, zcr, spectral_centroid (Hz), peak_freq (Hz), bandwidth (Hz). All finite — a NaN / Inf sample raises ValueError rather than producing NaN features; empty signal -> zeros.
The three spectral entries are built on spectrum, but every one of them is a *ratio* of magnitudes (argmax, a magnitude-weighted mean, a magnitude-weighted spread), so the raw |rfft| convention documented there cancels out and these numbers are unaffected by it. rms, peak and crest_factor are computed in the time domain and never touch the FFT.
• 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。
• (まだありません)
table を入力に取れる)—
signal)lowpass · highpass · bandpass · envelope · rms · local_std · quantize · companding_mu_law
*Provenance: dsp.py — ONED 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.