fullseye

phase_correlation_shift — FIT registration op

• データ種: image2d × image2d → table
• 呼び出し: import fullseye as fs; fs.ledger.phase_correlation_shift(image1, image2, window: 'str | None' = 'hann', whitening: 'float' = 0.5, method: 'str' = 'upsample', upsample_factor: 'int' = 100) -> 'dict' (実装を直接呼ぶなら import filters_freq; filters_freq.phase_correlation_shift(image1, image2, window: 'str | None' = 'hann', whitening: 'float' = 0.5, method: 'str' = 'upsample', upsample_factor: 'int' = 100) -> 'dict'、台帳から引くなら opsfit.get("phase_correlation_shift"))

使い方

2 枚の画像の位置合わせに必要なサブピクセル移動量を位相限定相関で求める。

The default method="upsample" refines the whitening-aware periodic FFT peak by evaluating a 1.5-pixel neighbourhood with a matrix-multiply local DFT using only NumPy (upsample_factor=100 by default). method="parabola" is faster, but its wrapped three-point parabola is biased about 0.166 px toward the integer grid. On the fixed 96x112 truth gates, parabola errors are 0.166 px (Hann) / 0.172 px (no window), versus 0.010 px for upsampling with either window; upsampling is required to stay within 0.02 px and within 0.01 px of scikit-image when it is installed. The local DFT follows Guizar-Sicairos, Thurman & Fienup (2008), Optics Letters 33(2), 156-158, doi:10.1364/OL.33.000156. The sign convention is explicit: when image2 = shift(image1, d), the result is approximately -d, so shift(image2, result) approximately equals image1. Returns row_shift/col_shift (also dy/dx), peak and peak_ratio (largest peak divided by the best peak outside its 3x3 neighbourhood). Constant or relatively textureless inputs raise ValueError.

参考(サンプルデータ・文献)

• 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。

実行できる例(この op を実際に呼ぶ検証済みサンプル)

• fit_ops_from_knowhow — py -3.11 examples/fit_ops_from_knowhow.py

型が繋がる次の op(table を入力に取れる)

—

同カテゴリ(registration)

—

---

Provenance: filters_freq.py — FIT 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.

This site is open source. Improve this page.