tb_zero_crossings_funct_1d — 2D typed op

• 資料種類:signal → signal

• 呼叫:fullseye.apply(img, "tb_zero_crossings_funct_1d", a=0.5, b=0.5)(2-D 的模型是一張圖 + 兩個純量旋鈕 a,b∈[0,1])

用法

函數符號發生變化處的索引(HALCON `zero_crossings_funct_1d`)。

> 以下的詳細說明為原文 —— 摘要與標題已翻譯。

Returns the integer indices `i with sign(y[i]) * sign(y[i+1]) < 0` —

the sample *before* each crossing. An empty input returns an empty index

array (degenerate case, not an error).

Honest limitation: the test is a strict sign product, so a crossing that

lands exactly on a zero sample (`[-1, 0, 1]`) is *not* reported, nor is a

touch of zero without a sign change (`[1, 0, 1]`).

:param y: 1-D function (may be empty).

:returns: int index array (possibly empty).

:raises ValueError: non-1-D / NaN / Inf input.

Typed bridge of the 1d op `zero_crossings_funct_1d into the 2-D evolution registry: the same implementation, called under the op(v, a, b) convention. This op has no tunable parameter; a and b` are unused.

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。

可執行的範例(實際呼叫該運算子並已驗證的樣例)

• (尚無)

型別可銜接的下一個運算子(可接受 signal 作為輸入)

identity · tb_create_funct_1d_array · tb_smooth_funct_1d_gauss · tb_smooth_funct_1d_mean · tb_derivate_funct_1d · tb_integrate_funct_1d · tb_abs_funct_1d · tb_negate_funct_1d

同類別(typed)

tb_points_to_voxel · tb_estimate_point_normals · tb_iss_keypoints · tb_angle_3points · tb_project_points · tb_render_point_depth · tb_statistical_outlier_removal · tb_radius_outlier_removal

*Provenance: ops.py — 2D 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.