integrate op• Datenarten: matrix × table → measurement
• Aufruf: import fullseye as fs; fs.ledger.fly_hs_readout(responses, lattice, n_pref, el_min_deg=0.0, rectify=True) (die Implementierung direkt: import flyvision; flyvision.fly_hs_readout(responses, lattice, n_pref, el_min_deg=0.0, rectify=True); aus dem Register: opsflyvision.get("fly_hs_readout"))
> Für diesen Operator gibt es noch keine Übersetzung. Es folgt der Originaltext unverändert.
Horizontal-system wide-field readout: opponent sum over the upper field.
Given a stack of motion-detector responses over the ommatidia — the first *n_pref* rows the preferred-direction type, the rest the anti-preferred — the opponent readout over the ommatidia above the horizon is::
(a - b) / (a + b + 1e-6)
where a and b are the (optionally rectified) totals of the preferred and anti-preferred responses over the columns with el > el_min_deg.
Only the upper visual field is used because the ground flow of forward motion is 1/distance while the rotational flow it must be separated from is distance-independent: an eye 1.2 mm above the floor sees floor flow of 330-1000 deg/s, above the ~200 deg/s bandwidth of the motion detectors, so the lower field carries speed the correlator cannot read and is excluded.
responses: a (k, n) matrix of responses, n matching the lattice.
lattice: the dict returned by fly_hex_lattice.
n_pref: how many leading rows are the preferred-direction type
(1 <= n_pref < k).
el_min_deg: the horizon; only ommatidia above it contribute.
rectify: half-wave rectify (clip negatives to 0) before summing.
Returns the opponent ratio as a float in [-1, 1].
Ground truth: with the preferred rows active only in the upper field and the anti-preferred rows silent, the readout is +1 (and the sign and value match the hand calculation); an el_min_deg above every ommatidium raises (pinned in the tests).
Raises ValueError: a non-2-D / empty / non-finite *responses*, a *responses* over the element cap, a *lattice* that is not a fly_hex_lattice result, a column count not matching the lattice, a *n_pref* outside [1, k-1], a non-real *el_min_deg*, a non-bool *rectify*, and an *el_min_deg* above every ommatidium (no upper field to read).
• Leitfaden zur Familie fly_vision
• Katalog der Beispieldaten (Download-URLs / Lizenzen) — 2-D nutzt skimage.data (BSD/Public Domain) plus synthetische Bilder, 3-D nennt Download-URLs echter Datenquellen (Stanford, PDS, …).
• Herkunft und Literatur der Operatoren — die Quellen der Forschung/Verfahren, auf denen diese Operatorfamilie beruht.
• Der kanonische Algorithmus (Autor, Jahr) und seine Anwendungen stehen im Familienleitfaden oben.
• poc_fly_vision — py -3.11 examples/poc_fly_vision.py
measurement als Eingabe)—
integrate)—
*Provenance: flyvision.py — FLYVISION Operator-Registry. Diese Notiz wird von tools/opdocs.py md erzeugt (nicht von Hand bearbeiten).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.