公开(公告)号：US20180204313A1

公开(公告)日：2018-07-19

申请号：US15746407

申请日：2016-07-20

Applicant: OKINAWA INSTITUTE OF SCIENCE AND TECHNOLOGY SCHOOL CORPORATION

Inventor： Faisal MAHMOOD ,  Märt TOOTS ,  Lars-Göran Wallentin ÖFVERSTEDT ,  Bo Ulf SKOGLUND

IPC: G06T5/10 ,  G06T5/00

CPC classification number: G06T5/10 ,  G06F17/142 ,  G06T5/002 ,  G06T2207/20056 ,  G06T2207/20192

Abstract: A method for performing 2-dimensional discrete Fourier transform of a subject image data to be performed in one or more digital processors includes performing 1-dimensional fast Fourier transform on each row of the subject image data and 1-dimensional fast Fourier transform on each column of the subject image, and performing a simplified fast Fourier transform processing on the extracted boundary image without performing column-by-column 1-dimensional fast Fourier transform by: performing 1-dimensional fast Fourier transform only on a first column vector in the extracted boundary image data, using scaled column vectors to derive fast Fourier transform of remaining columns of the extracted boundary image data, and performing 1-dimensional fast Fourier transform on each row of the extracted boundary image data. Then, fast Fourier transform of a periodic component of the subject image data with edge-artifacts removed and fast Fourier transform of a smooth component of the subject image data are derived from results of steps (b) and (c).

公开(公告)号：US20160356728A1

公开(公告)日：2016-12-08

申请号：US15216655

申请日：2016-07-21

Applicant: Okinawa Institute of Science and Technology School Corporation

Inventor： Faisal MAHMOOD ,  Lars-Göran Wallentin ÖFVERSTEDT ,  Bo Ulf SKOGLUND

IPC: G01N23/04

CPC classification number: G01N23/046 ,  G01N2223/401 ,  G01N2223/419 ,  G01N2223/42 ,  G01N2223/612 ,  G06T11/006 ,  G06T2211/432

Abstract: Apparatus for improving a three-dimensional (3D) reconstruction of a sample is programmed to execute instructions including: removing uncorrelated noise in said 3D reconstruction with COMET or other regularization techniques; and removing correlated noise in said 3D reconstruction by applying an Extended Field Iterative Reconstruction Technique (EFIRT) procedure.

Abstract translation: 用于改进样本的三维（3D）重建的装置被编程以执行指令，包括：使用COMET或其他正则化技术去除所述3D重建中的不相关噪声; 以及通过应用扩展场迭代重构技术（EFIRT）来去除所述3D重构中的相关噪声。

公开(公告)号：US20160003752A1

公开(公告)日：2016-01-07

申请号：US14770245

申请日：2014-03-05

Applicant: OKINAWA INSTITUTE OF SCIENCE AND TECHNOLOGY SCHOOL CORPORATION

Inventor： Faisal MAHMOOD ,  Lars-Göran Wallentin ÖFVERSTEDT ,  Bo Ulf SKOGLUND

IPC: G01N23/04

CPC classification number: G01N23/046 ,  G01N2223/401 ,  G01N2223/419 ,  G01N2223/42 ,  G01N2223/612 ,  G06T11/006 ,  G06T2211/432

Abstract: Computerized method and system for improving 3D reconstruction images involves applying the Extended Field Iterative Reconstruction Technique (EFIRT) to remove correlated noise, in addition to using COMET (constrained maximum relative entropy tomography) to eliminate uncorrelated noise, wherein the EFIRT is applied by performing a set of successive reconstructions on an extended field larger than a region of interest (ROI); and extracting and averaging the ROI from said set of successive reconstructions.

Abstract translation: 用于改进3D重建图像的计算机化方法和系统包括应用扩展场迭代重建技术（EFIRT）来消除相关噪声，以及使用COMET（约束最大相对熵断层扫描）来消除不相关噪声，其中EFIRT通过执行 在大于感兴趣区域（ROI）的扩展场上的连续重建集合; 以及从所述连续重建集合中提取和平均所述ROI。