stimulus op• 資料種類:無 → image2d(僅由參數決定的運算子 —— 不接受影像或資料輸入)
• 呼叫: 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)(要直接呼叫實作,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);從台帳取用則 opsflyvision.get("fly_sky_1f"))
> 該運算子的說明尚無譯文,以下照原文給出。
Synthetic equirectangular sky panorama with a banded 1/f azimuthal texture.
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`.
• 範例資料目錄(下載 URL / 授權) —— 2-D 用 skimage.data(BSD/公有領域)加合成圖,3-D 給出真實資料源(Stanford/PDS 等)的下載 URL。
• 運算子來歷與參考文獻 —— 該運算子族所依據的研究/方法出處。
• 演算法的正典(作者・年份)與用途見上面的族使用指南。
• poc_fly_vision — py -3.11 examples/poc_fly_vision.py
image2d 作為輸入)stimulus)—
*Provenance: flyvision.py — FLYVISION 運算子登記表。本條目由 tools/opdocs.py md 自動產生(請勿手動編輯)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.