stimulus op• Data kinds: कोई नहीं → image2d (केवल arguments से तय होने वाला op — यह कोई image या data input नहीं लेता)
• Call: import fullseye as fs; fs.ledger.fly_sky_1f(width=1024, height=512, band_lo_deg=20.0, band_hi_deg=60.0, amp=0.12, seed=0, edge_deg=5.0) (implementation को सीधे call करना हो तो import flyvision; flyvision.fly_sky_1f(width=1024, height=512, band_lo_deg=20.0, band_hi_deg=60.0, amp=0.12, seed=0, edge_deg=5.0), registry से लेना हो तो opsflyvision.get("fly_sky_1f"))
banded 1/f azimuthal texture वाला synthetic equirectangular sky panorama।
> नीचे का विस्तृत विवरण मूल text में है — सारांश और headings का अनुवाद हो चुका है।
An equirectangular image (row = elevation +90 deg down to -90 deg, column = azimuth 0 to 360 deg). Luminance is a vertical backlight gradient (0.62 at the zenith to 0.95 at the nadir) modulated in azimuth by a 1/f texture confined to an elevation band with cosine edges::
L = gradient(el) * (1 + amp * band(el) * noise(az)) clipped to [0, 1]
where noise has unit std, is clipped to +-2, and drops azimuthal frequencies below 2 cycles per revolution; band is 1 inside [band_lo_deg, band_hi_deg] with raised-cosine edges of width *edge_deg*.
width / height: the panorama size in pixels. band_lo_deg / band_hi_deg / edge_deg: the textured elevation band.
amp: the texture contrast on the backlight.
seed: integer seed for the azimuth noise (no None).
Returns a float64 (height, width) image in [0, 1].
Ground truth: the standard deviation across azimuth of a row inside the band exceeds that of a row outside it by more than 5x, and the log-log slope of the azimuthal power spectrum of an in-band row is -2 +- 0.4 (both pinned in the tests).
Raises ValueError: *width* / *height* outside their caps, a non-real / string / bool parameter, a negative *amp*, a non-positive *edge_deg*, and a band that does not satisfy -90 <= band_lo_deg < band_hi_deg <= 90.
• Sample data catalog (DL URL / license) — 2-D के लिए skimage.data (BSD/public) + synthetic, 3-D के लिए real data sources (Stanford/PDS आदि) के DL URL।
• Operators का स्रोत और संदर्भ — इस op family के मूल research/methods के स्रोत।
• Algorithm का मानक स्रोत (लेखक, वर्ष) और उपयोग ऊपर की family usage guide में दिए गए हैं।
• poc_fly_optomotor_steering — py -3.11 examples/poc_fly_optomotor_steering.py
• poc_fly_vision — py -3.11 examples/poc_fly_vision.py
image2d को input के रूप में लेते हैं)stimulus)—
*Provenance: flyvision.py — FLYVISION operator registry. यह per-op note tools/opdocs.py md से अपने-आप generate होता है (हाथ से edit न करें)।*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.