fullseye

fit_surface_principal_axes — 3D geometry op

• データ種: points → table
• 呼び出し: import fullseye as fs; fs.ledger.fit_surface_principal_axes(points, degree: 'int' = 2, *, isotropy_ratio: 'float' = 0.95) -> 'dict' (実装を直接呼ぶなら import measure3d; measure3d.fit_surface_principal_axes(points, degree: 'int' = 2, *, isotropy_ratio: 'float' = 0.95) -> 'dict'、台帳から引くなら ops3d.get("fit_surface_principal_axes"))

使い方

斜めの反った面を PCA 主軸へ回してから多項式 z'=f(x',y') を当てはめる。

The two largest principal axes span the local x/y plane and the smallest is local z. Returns center, row-vector axes, monomial powers, coefficients, local and original-frame fitted_points, unit normal at the centroid, and gradient-normalised geometric rms. degree is the total polynomial degree. A cloud whose two largest variances differ by less than isotropy_ratio is rejected because its in-plane principal directions are not identifiable. For degree one the returned normal agrees with :func:fit_plane3 up to sign.

参考(サンプルデータ・文献)

• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。
• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。

実行できる例(この op を実際に呼ぶ検証済みサンプル)

• primitive_fitting_3d — py -3.11 examples_3d/primitive_fitting_3d.py

型が繋がる次の op(table を入力に取れる)

fuse_to_voxel · mesh_select_lod

同カテゴリ(geometry)

line_from_2points · plane_from_3points · angle_3points · angle_between_lines · angle_between_planes · angle_line_plane · distance_point_plane · distance_point_line

---

Provenance: measure3d.py — 3D operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。

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

This site is open source. Improve this page.