annotate_panel_label — ANNOTATE paper op

Data kinds: image2dimage2d

Call: import annotate; annotate.annotate_panel_label(img, letter='a', corner='lt', margin=8, style='paren', font_size=16, color='neutral', box_alpha=0.72, text_color=None, box_color=None, scheme='okabe_ito', font_path=None) (or opsannotate.get("annotate_panel_label"))

Usage

Returns an image (image2d): a panel letter `(a)/(b)` placed in a corner.

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

`letter は 1 文字('a')か 0 始まりの番号(0 → a)。style` で

`(a) / a) / a / A` を選ぶ。

Raises

------

ValueError

未知の corner / style、文字が画像に収まらない。

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)

• (none yet)

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 (paper)

annotate_leader_layout · annotate_leader · annotate_markers · annotate_legend · annotate_dimension_layout · annotate_dimension · annotate_angle_layout · annotate_angle


*Provenance: annotate.py — ANNOTATE 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.