points_zyx_to_keypoints_uv — REPRCONV keypoint op

• Data kinds: points → keypoints

• Call: import fullseye as fs; fs.ledger.points_zyx_to_keypoints_uv(points) (to call the implementation directly, import reprconv; reprconv.points_zyx_to_keypoints_uv(points); from the registry, opsreprconv.get("points_zyx_to_keypoints_uv"))

Usage

A point set (N,3) = (z, y, x) → image coordinates (N,2) = (u, v).

The reverse direction of keypoints_uv_to_points. Irreversible -- z is dropped. The amount dropped can be measured: the values that do not come back after a round trip are exactly the z column, and selftest reports it numerically as "RMS of z = amount of information dropped".

Args:

points: (N, 3) (z, y, x).

Returns:

(N, 2) float64 (u, v) = (x, y).

Raises:

ValueError: invalid shape / non-finite.

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_roundtrip — py -3.11 examples/representation_roundtrip.py

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

keypoints_uv_to_points · keypoints_to_image2d

Same category (keypoint)

keypoints_uv_to_points · keypoints_to_image2d · keypoints_from_image2d · position_to_points · points_to_position

*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.