fly_hex_lattice — FLYVISION `lattice` op

• 資料種類:無 → table(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_hex_lattice(radius=15, dphi_deg=4.63, az0_deg=0.0, el0_deg=0.0, geometry='regular')(要直接呼叫實作,import flyvision; flyvision.fly_hex_lattice(radius=15, dphi_deg=4.63, az0_deg=0.0, el0_deg=0.0, geometry='regular');從台帳取用則 opsflyvision.get("fly_hex_lattice"))

用法

> 該運算子的說明尚無譯文,以下照原文給出。

Hexagonal ommatidial lattice: viewing directions of a compound eye.

A hexagon of n = 3*radius*(radius+1)+1 ommatidia on axial coordinates (u, v) with -radius <= u <= radius and max(-radius, -radius-u) <= v <= min(radius, radius-u) (u outer, v inner), each given an azimuth, an elevation and a unit viewing direction in body coordinates (x forward, y left, z up; az = atan2(y, x) left positive, el = asin(z)).

geometry="regular": az = az0 + dphi*(v + u/2), el = el0 + dphi*(sqrt(3)/2)*u — an isotropic hexagon.

geometry="boxeye": the pixel-grid distortion of the connectome-derived

models, pixel (y, x) = (13*(u + v/2), 13*v) with 13 px = dphi, so az = az0 - v*dphi and el = el0 - (u + v/2)*dphi; the diagonal neighbour is 1.118x the axial spacing.

radius: the hexagon radius in ommatidia.

dphi_deg: the inter-ommatidial angle in degrees. az0_deg / el0_deg: the direction of the lattice centre (the optical axis).

geometry: one of GEOMETRIES.

Returns a dict {"uv": (n,2) int, "az_rad": (n,), "el_rad": (n,), "dirs": (n,3) unit vectors, "dphi_rad": float, "geometry": str}.

Ground truth: n == 3*radius*(radius+1)+1 exactly, every dirs row is a unit vector, and for "boxeye" the ratio of the diagonal to the axial nearest-neighbour angular spacing is 1.118 (both pinned in the tests).

Raises ValueError: a *radius* outside [1, MAX_LATTICE_RADIUS], a non-positive *dphi_deg*, a non-real / non-finite / string / bool angle, and an unknown *geometry*.

詳細使用指南

• fly_vision 族使用指南

參考(範例資料、文獻)

• 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。

可執行的範例(實際呼叫該運算子並已驗證的樣例)

• poc_fly_optomotor_steering — py -3.11 examples/poc_fly_optomotor_steering.py

• poc_fly_vision — py -3.11 examples/poc_fly_vision.py

• poc_print_registration — py -3.11 examples/poc_print_registration.py

型別可銜接的下一個運算子(可接受 `table` 作為輸入)

fly_t4t5_field · fly_flow_from_directions · fly_matched_filter · fly_egomotion_from_flow · fly_eye_merge · fly_hex_resample · fly_hs_readout

同類別(`lattice`)

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*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)。*

fly_hex_lattice — FLYVISION lattice op

用法