sample op• 数据种类:image2d × table → signal
• 调用: import fullseye as fs; fs.ledger.fly_hex_resample(image2d, lattice, drho_deg=8.23, fov_deg=90.0, mode='pinhole')(要直接调用实现,import flyvision; flyvision.fly_hex_resample(image2d, lattice, drho_deg=8.23, fov_deg=90.0, mode='pinhole');从台账取用则 opsflyvision.get("fly_hex_resample"))
> 该算子的说明尚无译文,以下照原文给出。
Resample a pinhole image onto an ommatidial lattice (the eye's view).
Each ommatidium integrates the image under a Gaussian acceptance function of full width at half maximum *drho_deg* weighted by the pixel solid angle::
signal_i = sum_p w_ip * image_p / sum_p w_ip
w_ip = exp(-4 ln2 * a_ip^2 / drho_deg^2) * (1 + X_p^2 + Y_p^2)^(-3/2)
with a_ip the angular distance between ommatidium *i* and pixel *p*, cut off at a <= 2*drho_deg, and X, Y the pinhole-normalised pixel coordinates. The image is a perspective (pinhole) view whose optical axis is the lattice centre and whose *fov_deg* is the full vertical field of view.
image2d: a 2-D (H, W) pinhole image.
lattice: the dict returned by fly_hex_lattice.
drho_deg: the acceptance FWHM in degrees.
fov_deg: the full vertical field of view in degrees.
mode: "pinhole" (the only projection implemented).
Returns a 1-D float64 signal of n ommatidial intensities.
Ground truth: an azimuthal sinusoid of angular wavelength lambda is sampled with its amplitude scaled by the analytic modulation transfer exp(-pi^2 drho_deg^2 nu^2 / (4 ln2)), nu = 1/lambda, to within 0.05 over lambda from 15 to 80 degrees at equatorial ommatidia (pinned in the tests).
Raises ValueError: a non-2-D / empty / non-finite *image2d*, an image over the element cap, a *lattice* that is not a fly_hex_lattice result, a non-positive *drho_deg* / *fov_deg*, a *fov_deg* not below 180, an unknown *mode*, a n_ommatidia * n_pixels product over MAX_RESAMPLE_ELEMENTS, and — this is the field-of-view guard — any ommatidium whose nearest pixel is farther than dphi_rad/2 away (the eye is looking outside the image).
• 示例数据目录(下载 URL / 许可证) —— 2-D 用 skimage.data(BSD/公有领域)加合成图,3-D 给出真实数据源(Stanford/PDS 等)的下载 URL。
• 算子来历与参考文献 —— 该算子族所依据的研究/方法出处。
• 算法的正典(作者、年份)与用途见上面的族使用指南。
• poc_fly_optomotor_steering — py -3.11 examples/poc_fly_optomotor_steering.py
• poc_fly_vision — py -3.11 examples/poc_fly_vision.py
signal 作为输入)fly_hex_quantize · fly_emd_response · fly_lgmd_eta · fly_tau_from_expansion · fly_dsi
sample)*Provenance: flyvision.py — FLYVISION 算子登记表。本条目由 tools/opdocs.py md 自动生成(请勿手工编辑)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.