ct_adjoint_project — TOMOGRAPHY ct_scan op

• 数据种类:projstack × ctgeometry → voxel

• 调用: import fullseye as fs; fs.ledger.ct_adjoint_project(projections, geometry, device='auto')(要直接调用实现,import ctscan; ctscan.ct_adjoint_project(projections, geometry, device='auto');从台账取用则 opstomography.get("ct_adjoint_project"))

• GPU:无(仅 CPU 参考实现)

用法

ct_forward_project 的精确转置 A^T。

> 以下的详细说明为原文 —— 摘要与标题已翻译。

<A x, y> = <x, A^T y> holds to rounding, on every scan. This is what an iterative solver needs; it is not the reconstruction fdk_reconstruct does.

:param projections: (view, V, U) array. :param geometry: dict from ct_scan_geometry. :param device: "auto", "cpu" or "cuda". :returns: (Z, Y, X) float volume. :raises ValueError: on a shape that disagrees with the geometry. Empty input

(projections with 0 elements) raises ValueError.

参考(示例数据、文献)

• 示例数据目录(下载 URL / 许可证) —— 2-D 用 skimage.data(BSD/公有领域)加合成图,3-D 给出真实数据源(Stanford/PDS 等)的下载 URL。

• 算子来历与参考文献 —— 该算子族所依据的研究/方法出处。

• 算法的正典(作者、年份)与用途见上面的族使用指南。

可运行的示例(实际调用该算子并已验证的样例)

• ct_scan_modes — py -3.11 examples/ct_scan_modes.py

类型可衔接的下一个算子(可接受 voxel 作为输入)

radon_volume · ct_forward_project

同类别(ct_scan)

ct_scan_geometry · shepp_logan_3d · ellipsoid_phantom · ellipsoid_projections · ct_forward_project · fdk_reconstruct · sirt_reconstruct · os_sart_reconstruct

*Provenance: ctscan.py — TOMOGRAPHY 算子登记表。本条目由 tools/opdocs.py md 自动生成(请勿手工编辑)。*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.