fly_hex_quantize — FLYVISION `sample` op

• 数据种类:signal → signal

• 调用: import fullseye as fs; fs.ledger.fly_hex_quantize(signal, bits=3, mode='log', contrast=0.2)(要直接调用实现,import flyvision; flyvision.fly_hex_quantize(signal, bits=3, mode='log', contrast=0.2);从台账取用则 opsflyvision.get("fly_hex_quantize"))

用法

> 该算子的说明尚无译文,以下照原文给出。

個眼信号を眼と同じやり方で量子化する: 対数圧縮してから個眼あたり n ビット(`mode="onoff"` は ON / OFF の 2 チャネル)。

複眼は生まれつき量子化器で、片眼およそ 800 個眼(間隔 4.6°)、光受容器は強度を対数圧縮して平均に適応し、

ラミナの L1 / L2 が平均からの偏差を ON と OFF に分ける。この op はその予算を再現し、下流のモデル

(reservoir・網膜部位対応の検査)に「本当に何ビット要るか」を問えるようにする。

A compound eye is a quantizer by construction: ~800 ommatidia per eye at 4.6 deg spacing,

photoreceptors that log-compress intensity and adapt to the mean, and lamina cells (L1/L2)

that split the deviation into ON and OFF channels. This op reproduces that budget so a

downstream model (reservoir, retinotopy test) can be asked how many bits it really needs.

Parameters

----------

signal : (n,) float

Per-ommatidium intensities >= 0 (`fly_hex_resample` output).

bits : int

1..8 levels = 2**bits (`mode="onoff"` ignores it: the output is the signed pair below).

mode : str

`"log"`: log1p-compress relative to the mean, shift the darkest ommatidium to 0, then

uniform levels over the compressed range; `"linear": uniform levels over [0, max]; "onoff"`: deviation from the mean

relative to `contrast clipped to [-1, 1] and returned as 2 * n values [ON..., OFF...]`

(ON = positive part, OFF = negative part), each >= 0.

contrast : float

Michelson-style contrast that saturates the ON/OFF channels (`mode="onoff"` only).

Returns

-------

(n,) float in [0, 1] (levels / (2**bits - 1)); for `"onoff"` (2n,) in [0, 1].

Notes

-----

Non-finite or negative inputs are refused. A constant signal quantizes to all-zeros

(`"log" / "onoff"`) — there is no contrast to encode.

详细使用指南

• fly_vision 族使用指南

参考(示例数据・文献)

• 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。

可运行的示例(实际调用该算子并已验证的样例)

• poc_eye_to_brain — py -3.11 examples/poc_eye_to_brain.py

类型可衔接的下一个算子(可接受 `signal` 作为输入)

fly_emd_response · fly_lgmd_eta · fly_tau_from_expansion · fly_dsi

同类别(`sample`)

fly_hex_resample

*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)。*

fly_hex_quantize — FLYVISION sample op

用法