descriptor_to_matrix — REPRCONV descriptor op

• Data kinds: descriptor → matrix

• Call: import reprconv; reprconv.descriptor_to_matrix(descriptor) (or opsreprconv.get("descriptor_to_matrix"))

Usage

Descriptor → `matrix. The exit from descriptor` (invertible).

> The detailed description below is the original text — the summary and the headings are translated.

1-D の記述子 (n,) は (1, n) の 1 行行列にする。2-D の記述子束

(`sh_descriptor` の (12, 9) のような「点 x 次元」)はそのまま通す。

こうしておくと記述子バンクに `mat_svd / mat_pinv / mat_cond`

がそのまま掛かる —— 記述子は本質的にベクトルなので、行列語彙へ渡すのは

梱包の付け替えであって変形ではない。

:func:matrix_to_descriptor と往復して bit 一致(実測 max|Δ| = 0.0)。

Args:

descriptor: (n,) または (m, n) の実配列。

Returns:

(1, n) または (m, n) float64。

Raises:

ValueError: 3-D 以上 / 非有限 / dict(`fit_zernike` は dict を返すので

ここで拒否される —— 詳細は本モジュール docstring)。

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.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• representation_conversion — py -3.11 examples/representation_conversion.py

• representation_roundtrip — py -3.11 examples/representation_roundtrip.py

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

matrix_to_descriptor · matrix_to_angle · matrix_to_rot_scale

Same category (descriptor)

matrix_to_descriptor · descriptor_to_table

*Provenance: reprconv.py — REPRCONV 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.