overlay_labels — ANNOTATE `overlay` op

• Data kinds: image2d × labels → image2d

• Call: import annotate; annotate.overlay_labels(img, labels, alpha=0.5, colors=None, scheme='okabe_ito', background=0) (or opsannotate.get("overlay_labels"))

Usage

Overlay a colour label map with alpha. The same label number always gets the same colour.

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

Parameters

----------

labels : (H,W) int

ラベル番号の地図。`background`(既定 0)は透明。

colors : (k,3) or None

番号 → 色。None なら Okabe–Ito 8 色を番号順に周回する

(乱数を使わないので、同じラベル図なら常に同じ絵になる)。

Raises

------

ValueError

形の不一致 / 負のラベル / alpha が [0,1] の外 / colors の形。

Detailed usage guide

• figure_annotation family guide

Background guides (the physics and conventions behind this op)

• dataset_conventions — 学習データセット規約の知識 — COCO / YOLO / VOC と外観検査での落とし穴

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)

• annotate_gallery — py -3.11 examples/annotate_gallery.py

Ops the type connects to (they accept `image2d` as input)

text_box · arrow · leader_line · label_points · crosshair · legend_box · color_bar · scale_bar

Same category (`overlay`)

overlay_mask

*Provenance: annotate.py — ANNOTATE operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

overlay_labels — ANNOTATE overlay op