envelope — ONED signal op

• Data kinds: signal → signal

• Call: import fullseye as fs; fs.ledger.envelope(x) (to call the implementation directly, import dsp; dsp.envelope(x); from the registry, ops1d.get("envelope"))

Usage

Amplitude envelope via the analytic (Hilbert) signal — the shape of a knock / impact / acoustic-emission burst.

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• coherence_scanning — py -3.11 examples/coherence_scanning.py

• poc_beam_modal_video — py -3.11 examples/poc_beam_modal_video.py

Ops the type connects to (they accept signal as input)

create_funct_1d_array · create_funct_1d_pairs · smooth_funct_1d_gauss · smooth_funct_1d_mean · derivate_funct_1d · integrate_funct_1d · zero_crossings_funct_1d · local_min_max_funct_1d

Same category (signal)

lowpass · highpass · bandpass · rms · local_std · quantize · companding_mu_law · resample

*Provenance: dsp.py — ONED operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.