tb_landmark_asymmetry — 2D typed op

Data kinds: pointssignal

Call: fullseye.apply(img, "tb_landmark_asymmetry", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])

*No figure: this op takes points as input. A Studio program starting from an image cannot reach that type — see the runnable examples below for how it is used.*

Usage

> This operator's description has not been translated yet. The original text follows as it is.

左右の対ごとの符号つき非対称量。→ `(M,)`。

各対について、片方を面で鏡映してもう片方と比べ、面の法線方向の差を返す。

符号は「右が外側なら正」(:func:mirror_plane_from_pairs が法線をその向きに

揃えている)。絶対値にまとめない —— 左右どちらが張り出しているかは

臨床でも検査でも意味が違う。

`pairs=None / plane=None はどちらも :func:mirror_plane_from_pairs`

と同じ既定(前半/後半の対、その対から出した正中面)。**面を省くと、面自体が

同じ対から決まる**ので「面を決めた材料で面からのずれを測る」ことになる ——

それでも左右差は測れる(中点は定義上どちらの側にも寄らない)が、

別の情報源から面が決まるなら渡したほうが強い。

2-D 進化レジストリへ橋渡しした shapestat の op `landmark_asymmetry。実装は同じで、呼び出し規約だけ op(v, a, b) に合わせてある。この op に調整点は無く、ab` も使われない。

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

Runnable examples (verified samples that actually call this op)

• (none yet)

Ops the type connects to (they accept signal as input)

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_zero_crossings_funct_1d · tb_abs_funct_1d

Same category (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 operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.