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_optomotor_steering — py -3.11 examples/poc_fly_optomotor_steering.py
• 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.