compose_funct_1d — ONED function op

• 数据种类:signal × signal → signal

• 调用: import fullseye as fs; fs.ledger.compose_funct_1d(y1, y2)(要直接调用实现,import funct1d; funct1d.compose_funct_1d(y1, y2);从台账取用则 ops1d.get("compose_funct_1d"))

用法

> 该算子的说明尚无译文,以下照原文给出。

Composition `y1(y2)`: the values of *y2* used as positions into *y1*

(HALCON `compose_funct_1d`).

Each `y2[i]` is rounded to the nearest integer and clamped into

`[0, len(y1) - 1], then out[i] = y1[that index]`. Nearest-neighbour

lookup, no interpolation.

Domain policy (documented difference from HALCON, which errors when the

range of *y2* leaves the domain of *y1*): out-of-domain positions are

clamped to the first / last sample of *y1*, never extrapolated. If you need

the strict check, compare `y_range_funct_1d(y2)` against

`x_range_funct_1d(y1)` before composing.

:param y1: outer function, at least 1 sample.

:param y2: inner function supplying positions (may be empty).

:returns: float64 array with the length of *y2*.

:raises ValueError: non-1-D / NaN / Inf input, or empty *y1*.

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)

• (暂无)

类型可衔接的下一个算子(可接受 signal 作为输入)

create_funct_1d_array · create_funct_1d_pairs · smooth_funct_1d_gauss · smooth_funct_1d_mean · derivate_funct_1d · integrate_funct_1d · zero_crossings_funct_1d · local_min_max_funct_1d

同类别(function)

create_funct_1d_array · create_funct_1d_pairs · smooth_funct_1d_gauss · smooth_funct_1d_mean · derivate_funct_1d · integrate_funct_1d · zero_crossings_funct_1d · local_min_max_funct_1d

*Provenance: funct1d.py — ONED 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.