-
公开(公告)号：US11927586B2
公开(公告)日：2024-03-12
申请号：US17252145
申请日：2019-07-01
Applicant: UNIVERSITEIT ANTWERPEN , IMEC VZW
Inventor： Jan De Beenhouwer , Jan Sijbers
IPC: G06K9/00 , G01N23/046 , G01N33/36 , G06T7/00
CPC classification number: G01N33/367 , G01N23/046 , G06T7/0004 , G01N2223/401 , G01N2223/405 , G01N2223/419 , G06T2207/30124
Abstract: A method and system for inspection of an item, and a use thereof, are presented. The method comprises acquiring a plurality of projection images of an item at a plurality of projection angles for performing a tomographic reconstruction of the item. A plurality of objects are detected in the tomographic reconstruction and each object has a generic shape described by a parametric three-dimensional numerical model. Said detection comprises determining initial estimates of position and/or orientation of each object and at least one geometrical parameter of the three-dimensional model for each object. The initial estimates are iteratively refining by using a projection-matching approach, in which forward projection images are simulated for the objects according to operating parameters of the radiation imaging device and a difference metric between acquired projection images and simulated forward projection images is reduced at each iteration step.
-
公开(公告)号：US11953451B2
公开(公告)日：2024-04-09
申请号：US17251996
申请日：2019-07-01
Applicant: UNIVERSITEIT ANTWERPEN , IMEC VZW
Inventor： Jan De Beenhouwer , Jan Sijbers
CPC classification number: G01N23/04 , G06N20/00 , G06T7/001 , G01N2223/645 , G01N2223/646 , G06T2207/20081 , G06T2207/30108
Abstract: A method is provided for inspection of an item comprising acquiring a projection image of the item using a radiation imaging system and obtaining a plurality of simulated projection images of the item or a component thereof, based on a simulation of a numerical three-dimensional model. A relative orientation of the item with respect to the imaging system is determined by comparing the projection image to the plurality of simulated images, and at least one angle of rotation is determined by taking into account a viewing angle and the relative orientation. The method further comprises moving the item and/or the imaging system in accordance with the at least one angle of rotation and acquiring a further projection image of the item.
-
Patent Agency Ranking
公开(公告)号：US09373180B2
公开(公告)日：2016-06-21
申请号：US14355286
申请日：2012-10-30
Applicant: UNIVERSITEIT ANTWERPEN , CWI
Inventor： Kees Joost Batenburg , Jan Sijbers
CPC classification number: G06T11/005 , A61B6/508 , A61B6/583 , G06T2211/424 , G06T2211/436
Abstract: A method for determining a projection angle for use in tomographic imaging comprises obtaining projection data including at least one projection view from at least one projection angle. The at least one projection view is generated by scanning a test object with a tomographic imaging device. Each projection view comprises at least one observation value obtained at least one detection location, providing a plurality of candidate projection angles, for each candidate projection angle, calculating a function value indicative of an amount of information that may be gained by adding to the projection data a further projection view generated by scanning of the test object with the tomographic imaging device from the candidate projection angle, and selecting a candidate projection angle from the plurality of candidate projection angles taking into account the function values. A corresponding system and computer program product also is provided.
Abstract translation: 用于确定用于断层摄影成像的投影角度的方法包括从至少一个投影角度获得包括至少一个投影视图的投影数据。 所述至少一个投影视图是通过用断层图像成像装置扫描测试对象而产生的。 每个投影视图包括至少一个观察值，其至少一个检测位置获得，为每个候选投影角度提供多个候选投影角度，计算指示可以通过添加到投影数据获得的信息量的函数值 通过从候选投影角度用断层图像成像装置扫描测试对象而产生的另一投影视图，并且考虑到功能值，从多个候选投影角度中选择候选投影角度。 还提供了相应的系统和计算机程序产品。
-
公开(公告)号：US10520452B2
公开(公告)日：2019-12-31
申请号：US15558671
申请日：2016-03-16
Inventor： Mattias Van Dael , Pieter Verboven , Bart Nicolaï , Jelle Dhaene , Luc Van Hoorebeke , Jan Sijbers
IPC: G01N23/046 , G01N33/02 , G06T7/00 , G01N23/18 , H04N13/204
Abstract: A non-destructive inspection method for inline inspection of an object comprises moving an object in between a radiation source and an image detector and through a three-dimensional scanner field of view, imaging the object using the image detector to obtain a projection radiograph of an internal structure of the object, scanning an exterior surface of the object using the 3D scanner, fitting a shape model of the object to a point cloud provided by the 3D scanner to obtain a surface model of the exterior surface, creating a solid model of the surface model by taking a grey value distribution of a reference object into account, simulating a reference radiograph from the solid model and comparing the reference and projection radiographs to detect internal deviations of the object.
-
公开(公告)号：US09996951B2
公开(公告)日：2018-06-12
申请号：US15310216
申请日：2015-05-06
Applicant: Agfa HealthCare , Universiteit Antwerpen
Inventor： Jan Sijbers , Jeroen Cant
CPC classification number: G06T11/006 , A61B6/5258 , G01N23/046 , G06T2211/412 , G06T2211/416 , G06T2211/424
Abstract: A computerized tomographic image exposure and reconstruction method wherein an object is subjected to irradiation during a relative movement of a source of radiation, the object, and a radiation detector and wherein a digital representation of the radiation image of the object is computed by applying a tomographic reconstruction algorithm to image data read out of the irradiated radiation detector. A number of projection images are generated, each of the projection images being generated by integrating X-ray beams continuously emitted during the relative movement through a predefined movement path, and the created projection images are modeled in a tomographic reconstruction algorithm.
-
公开(公告)号：US10859511B2
公开(公告)日：2020-12-08
申请号：US16093275
申请日：2017-04-06
Applicant: UNIVERSITEIT ANTWERPEN
Inventor： Jan Sijbers , Jan Jozef Victor De Beenhouwer
IPC: G01N23/04 , G01N23/046 , G01V5/00
Abstract: A system for imaging a target object comprises a first unmanned vehicle including a source of penetrating radiation. The first vehicle positions the source such as to direct the radiation toward the target object. A second unmanned vehicle comprises an image detector for registering a spatial distribution of the radiation as an image, in which the second vehicle positions the detector to register the distribution of radiation when transmitted through the target object. These unmanned vehicles are autonomous vehicles adapted for independent propelled motion, and comprise a positioning unit for detecting a position of the vehicle. A processing unit controls the motion of the unmanned vehicles to acquire at least two images corresponding to at least two different projection directions of the radiation through the target object. The processing unit is adapted for generating data representative of an internal structure of the target object from the at least two images.
-
公开(公告)号：US20140307934A1
公开(公告)日：2014-10-16
申请号：US14355286
申请日：2012-10-30
Applicant: UNIVERSITEIT ANTWERPEN , CWI
Inventor： Kees Joost Batenburg , Jan Sijbers
IPC: G06T11/00
CPC classification number: G06T11/005 , A61B6/508 , A61B6/583 , G06T2211/424 , G06T2211/436
Abstract: A method for determining a projection angle for use in tomographic imaging comprises obtaining projection data including at least one projection view from at least one projection angle. The at least one projection view is generated by scanning a test object with a tomographic imaging device. Each projection view comprises at least one observation value obtained at least one detection location, providing a plurality of candidate projection angles, for each candidate projection angle, calculating a function value indicative of an amount of information that may be gained by adding to the projection data a further projection view generated by scanning of the test object with the tomographic imaging device from the candidate projection angle, and selecting a candidate projection angle from the plurality of candidate projection angles taking into account the function values. A corresponding system and computer program product also is provided.
Abstract translation: 用于确定用于断层成像成像的投影角度的方法包括从至少一个投影角度获得包括至少一个投影视图的投影数据。 所述至少一个投影视图是通过用断层图像成像装置扫描测试对象而产生的。 每个投影视图包括至少一个观察值，其至少一个检测位置获得，为每个候选投影角度提供多个候选投影角度，计算指示可以通过添加到投影数据获得的信息量的函数值 通过从候选投影角度用断层图像成像装置扫描测试对象而产生的另一投影视图，并且考虑到功能值，从多个候选投影角度中选择候选投影角度。 还提供了相应的系统和计算机程序产品。
-
-
-
-
-
-
Search Results
7
records
(took 0.014 seconds)
