position_to_points — REPRCONV keypoint op

• Data kinds: position → points

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

Usage

A position (z, y, x) → a one-point set (1, 3). The exit from position (invertible).

position is a 3-tuple returned by volregion.vol_rle_centroid and the like, and its order is (z, y, x) (the docstring of vol_rle_centroid states this explicitly). Point clouds derived from voxels have the same order, so it can be turned directly into a 1-row point cloud.

Args:

position: a sequence of length 3 (z, y, x).

Returns:

(1, 3) float64.

Raises:

ValueError: length is not 3 / 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_conversion — py -3.11 examples/representation_conversion.py

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

points_zyx_to_keypoints_uv · points_to_position · select_points · flow_apply · points_to_gaussians

Same category (keypoint)

keypoints_uv_to_points · points_zyx_to_keypoints_uv · keypoints_to_image2d · keypoints_from_image2d · 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.