flow_apply — REPRCONV flow op

• Data kinds: points × flow_scattered → points

• Call: import reprconv; reprconv.flow_apply(points, flow) (or opsreprconv.get("flow_apply"))

Usage

Add a scattered flow `(N,3) to a point set (N,3) → points. The consuming side of flow`.

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

`estimate_flow(a, b)` が「a の各点から b の最近傍への変位」を返すので、

`flow_apply(a, estimate_flow(a, b))` は **b の点のうち a から最近傍として

選ばれたもの**へ移る。往復が厳密になるのは対応が全単射のときだけで、

そうでなければ「a の 2 点が b の同じ点へ落ちる」ぶんだけ形が縮む

—— `selftest` はこの残差を数字で出す。

Args:

points: (N, 3)。

flow: (N, 3)。

Returns:

(N, 3) float64。

Raises:

ValueError: 行数不一致 / 形状不正 / 非有限。

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 · points_to_gaussians

Same category (flow)

flow_magnitude · flow_to_rgbimage · flow_speed

*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.