decode_barcode — 2D `barcode` op

• Data kinds: image → feature

• Call: fullseye.apply(img, "decode_barcode", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])

• HALCON equivalent: find_bar_code (the HALCON reference is a useful guide to its meaning and parameters)

Usage

> This operator's description has not been translated yet. The original text follows as it is.

中央走査線上の明暗の切り替わり回数を数える簡易バーコード風特徴量。HALCON の `find_bar_code`（Detect and read bar code symbols in an image.）とは似て非なるもので、シンボル体系の判定やデータのデコードは一切行わない（バー「数」を数えるだけ）。

`a が「暗い」とみなすしきい値を 0.3〜0.7 に振る。b は未使用。画像中央の行（v.shape[0]//2）だけを見て、v < しきい値` の画素を 1 とした列に対し、0→1 に立ち上がる回数（暗いバーの本数）を数える。実際のバーコードのデータ（数字・文字列）は得られない。

Detailed usage guide

• gallery2d_physics_alife_3d family guide

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)

• gallery2d_physics_alife_3d — py -3.11 examples/gallery2d_physics_alife_3d.py

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

identity

Same category (`barcode`)

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*Provenance: ops.py — 2D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

decode_barcode — 2D barcode op