leader_line — ANNOTATE `pointer` op

• Data kinds: image2d × text → image2d

• Call: import annotate; annotate.leader_line(img, anchor_xy, target_xy, text=None, color='emphasis', width=2, cap='dot', cap_size=4, elbow=True, scheme='okabe_ito', style=None, **text_kw) (or opsannotate.get("leader_line"))

Usage

A leader line — from the note's position (`anchor_xy) to its target (target_xy`).

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

`elbow=True` なら水平 → 斜めの 2 折れで引く(注記が本体に被りにくい)。

端点には `cap の印('dot'/'arrow'/'cross'/'none'`)を置く。

`text を渡すと anchor_xy 側に :func:text_box` を置く。

追加の `**text_kw は :func:text_box` へそのまま渡す。

Raises

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ValueError

未知の `cap`、非有限な座標、線が画像の外。

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 · label_points · crosshair · legend_box · color_bar · scale_bar · axes_frame

Same category (`pointer`)

arrow · label_points · crosshair

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

leader_line — ANNOTATE pointer op