texture op• データ種: image → image
• 呼び出し: fullseye.apply(img, "tf_census_transform", a=0.5, b=0.5) (2-D は 1 画像 + 2 スカラつまみ a,b∈[0,1] のモデル)
census_transform: the 3x3 non-parametric census bit-signature image.
For every pixel each of its 8 neighbours contributes one bit, set when the
centre exceeds the neighbour by more than a *relative* tolerance
`a * |centre| (a defaults the tolerance; b` unused). The 8 bits form
a value 0..255 rendered as [0,1]. Because the tolerance is relative and the
comparison is on ordering only, the signature is invariant to a global gain
(multiplying the image by any positive constant leaves every bit unchanged) --
the robustness-to-gain property that makes census matching useful for stereo.
Uses the raw (non-luma-collapsed) reflected border.
• gallery2d_texture_freq ファミリ ガイド
• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。
• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。
• アルゴリズムの正典(著者・年)と用途は上記ファミリ使い方ガイドに記載。
• gallery2d_texture_freq — py -3.11 examples/gallery2d_texture_freq.py
image を入力に取れる)identity · gaussian · mean_box · bilateral · unsharp · median · min_filter · max_filter
texture)std_filter · gabor · sk_frangi · sk_meijering · sk_hessian · sk_gabor · sk_lbp · sk_entropy
*Provenance: ops.py — 2D operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.