text op• Data kinds: labels2d → labels2d
• Call: import fullseye as fs; fs.ledger.select_characters(labels, min_height_ratio=0.5, max_height_ratio=1.5, max_width_ratio=2.0) (to call the implementation directly, import mvtext; mvtext.select_characters(labels, min_height_ratio=0.5, max_height_ratio=1.5, max_width_ratio=2.0); from the registry, opsmv.get("select_characters"))
• HALCON equivalent: select_characters (the HALCON reference is a useful guide to its meaning and parameters)
• GPU: none (CPU reference implementation only)
Drop blobs whose height or width is off the median from a character label image and renumber from the left.
> The detailed description below is the original text — the summary and the headings are translated.
高さと幅の中央値に対する比で判定する。塊が 1 つも無いと全 0 を返す(理由: 字が無い)。空の入力(labels が 0 要素)は ValueError。
Args:
labels: segment_characters のラベル画像。
min_height_ratio: 高さの下限(中央値に対する比)。
max_height_ratio: 高さの上限(中央値に対する比)。
max_width_ratio: 幅の上限(中央値に対する比)。
Returns:
labels と同じ形の整数ラベル画像。
• machine_vision_classics family guide
• 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.
• machine_vision_tour — py -3.11 examples/machine_vision_tour.py
• poc_real_typewritten_ocr — py -3.11 examples/poc_real_typewritten_ocr.py
labels2d as input)—
text)text_line_orientation · text_line_slant · segment_characters
*Provenance: mvtext.py — MV 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.