ellipsoid_projections — TOMOGRAPHY ct_scan op

• 数据种类:ctgeometry → projstack

• 调用: import fullseye as fs; fs.ledger.ellipsoid_projections(geometry, ellipsoids=None, device='auto')(要直接调用实现,import ctscan; ctscan.ellipsoid_projections(geometry, ellipsoids=None, device='auto');从台账取用则 opstomography.get("ellipsoid_projections"))

• GPU:无(仅 CPU 参考实现)

用法

椭球之和的精确线积分，适用于本族的任意扫描。

> 以下的详细说明为原文 —— 摘要与标题已翻译。

Each ray is mapped to the frame where the ellipsoid is a unit sphere, and the chord length comes from the quadratic's discriminant. No voxels, no interpolation and no projector are involved, which is what makes this the ground truth the projector and every reconstruction here are measured against.

:param geometry: dict from ct_scan_geometry. :param ellipsoids: (N, 8) rows; None gives SHEPP_LOGAN_3D. :param device: "auto", "cpu" or "cuda". :returns: (view, V, U) float array. :raises ValueError: on a geometry not from ct_scan_geometry.

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 projstack 作为输入)

ct_adjoint_project · fdk_reconstruct · sirt_reconstruct · os_sart_reconstruct · tv_reconstruct · ct_dual_energy_reconstruct

同类别(ct_scan)

ct_scan_geometry · shepp_logan_3d · ellipsoid_phantom · ct_forward_project · ct_adjoint_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.