annotate_markers — ANNOTATE paper op

• Data kinds: image2d → image2d

• Call: import fullseye as fs; fs.ledger.annotate_markers(img, points, labels=None, start=1, radius=9.0, color='emphasis', text_color=None, font_size=11, scheme='okabe_ito', font_path=None, min_contrast=2.0) (to call the implementation directly, import annotate; annotate.annotate_markers(img, points, labels=None, start=1, radius=9.0, color='emphasis', text_color=None, font_size=11, scheme='okabe_ito', font_path=None, min_contrast=2.0); from the registry, opsannotate.get("annotate_markers"))

Usage

Returns an image (image2d): a round marker carrying a number (or a short string) at each point.

If you pass the same start / labels as to annotate_legend, the numbers in the figure and the numbers in the legend always match.

Parameters

points : (N, 2)

(x, y). Points outside the image are a ValueError.

labels : sequence of str or None

If None, consecutive numbers from start.

radius : float

Circle radius [px]. If the text does not fit, ValueError.

Raises

ValueError

points empty, non-finite or outside the image, number of labels mismatched, text does not fit in the circle,

insufficient contrast between text colour and circle colour.

Detailed usage guide

• figure_annotation family guide

Background guides (the physics and conventions behind this op)

• dataset_conventions — Training-dataset conventions — COCO / YOLO / VOC and pitfalls in visual inspection

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)

• paper_figure — py -3.11 examples/paper_figure.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 (paper)

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

*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.