descriptor op• Data kinds: descriptor → matrix
• Call: import fullseye as fs; fs.ledger.descriptor_to_matrix(descriptor) (to call the implementation directly, import reprconv; reprconv.descriptor_to_matrix(descriptor); from the registry, opsreprconv.get("descriptor_to_matrix"))
Descriptor → matrix. The exit from descriptor (invertible).
A 1-D descriptor (n,) becomes a 1-row matrix (1, n). A 2-D descriptor bundle ("points x dimensions", like the (12, 9) of sh_descriptor) passes through unchanged. This way mat_svd / mat_pinv / mat_cond can be applied to a descriptor bank directly -- a descriptor is essentially a vector, so handing it to the matrix vocabulary is a change of packaging, not a transformation.
Round trip with matrix_to_descriptor is bit-identical (measured max|Δ| = 0.0).
Args:
descriptor: (n,) or (m, n) real array.
Returns:
(1, n) or (m, n) float64.
Raises:
ValueError: 3-D or more / non-finite / dict (fit_zernike returns a dict, so
it is rejected here -- details in this module's docstring).
• 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.
• representation_conversion — py -3.11 examples/representation_conversion.py
• representation_roundtrip — py -3.11 examples/representation_roundtrip.py
matrix as input)matrix_to_descriptor · matrix_to_angle · matrix_to_rot_scale
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.