fbp_volume — TOMOGRAPHY volume op

• データ種: sinostack → voxel

• 呼び出し: import fullseye as fs; fs.ledger.fbp_volume(stack, angles_deg=None, size=None, filter_name='ramp', cutoff=1.0, span_deg=None) (実装を直接呼ぶなら import tomography; tomography.fbp_volume(stack, angles_deg=None, size=None, filter_name='ramp', cutoff=1.0, span_deg=None)、台帳から引くなら opstomography.get("fbp_volume"))

使い方

(Z, A, D) スタックの全サイノグラムを再構成 → (Z, S, S) ボリューム。

> 以下の詳細説明は原文のままです —— 要約と見出しは訳出済み。

The inverse of radon_volume, slice by slice. The result is a plain volume and every existing 3-D operator applies to it directly — windowing, labelling, boundary extraction, marching cubes — which is the point of returning voxel rather than something tomography-specific.

One number worth carrying into that pipeline: the reconstructed slice grid is isotropic in-plane only. The slice spacing is whatever the scan used, and it is usually coarser; the volume itself does not carry it. Passing this volume to a measurement without its spacing is the most common way a tomographic volume becomes a wrong number — see examples/tomography_reconstruct.py, which measures the size of the error.

:param stack: (Z, n_angles, n_detectors). :param angles_deg: view angles; None -> uniform [0, 180). :param size: output side per slice; None -> the inscribed square. :param filter_name: one of FILTERS. :param cutoff: fraction of Nyquist to keep. :param span_deg: angular range for the d(theta) weight. :returns: (Z, size, size) float64 volume. :raises ValueError: on a non-3-D stack, or an output over

MAX_STACK_ELEMENTS.

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)

• poc_battery_ct_degradation — py -3.11 examples/poc_battery_ct_degradation.py

• tomography_reconstruct — py -3.11 examples/tomography_reconstruct.py

型が繋がる次の op(voxel を入力に取れる)

radon_volume

同カテゴリ(volume)

radon_volume

*Provenance: tomography.py — TOMOGRAPHY 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.