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公开(公告)号：US06907102B1
公开(公告)日：2005-06-14
申请号：US10319674
申请日：2002-12-16
CPC分类号： G06T11/006 , A61B6/027 , A61B6/032 , A61B6/4085 , G06T2211/424 , Y10S378/901
摘要： A multi-slice computed tomography imaging system is provided including a source that generates an x-ray beam and a detector array that receives the x-ray beam and generates projection data. A translatable table has an object thereon and is operable to translate in relation to the source and the detector array. The source and the detector array rotate about the translatable table to helically scan the object. An image reconstructor is electrically coupled to the detector array and reconstructs an image in response to the projection data using a computed tomography modeled iterative reconstruction technique. The iterative reconstruction technique includes determining a cross-section reconstruction vector, which approximately matches the projection data via a computed tomography model. Methods for performing the same are also provided including accounting for extended boundary regions.
摘要翻译： 提供了一种多切片计算机断层摄影成像系统，其包括产生X射线束的源和接收X射线束并产生投影数据的检测器阵列。 一个可翻译的桌子上有一个物体，它可以相对于源和检测器阵列进行平移。 源和检测器阵列绕可翻译表旋转以螺旋扫描对象。 图像重构器电耦合到检测器阵列，并且使用计算机断层摄影建模的迭代重建技术来响应于投影数据重建图像。 迭代重建技术包括确定通过计算机断层摄影模型近似匹配投影数据的横截面重建矢量。 还提供了用于执行该方法的方法，包括扩展边界区域的计算。
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公开(公告)号：US06768782B1
公开(公告)日：2004-07-27
申请号：US10319689
申请日：2002-12-16
IPC分类号： A61B603
CPC分类号： A61B6/032 , A61B6/4085 , A61B6/469 , Y10S378/901
摘要： An imaging system is provided including a source generating an x-ray beam and a detector array receiving the x-ray beam and generating projection data corresponding to at least a scanned portion of an object. An image reconstructor is electrically coupled to said detector array and reconstructs an image of the scanned portion of the object for a full field-of-view in response to said projection data using a dual iterative reconstruction technique. The dual iterative reconstruction technique includes reconstructing the full field-of-view using a first resolution and reconstructing a region-of-interest within the full FOV using a second resolution. A method is also provided for reconstructing an image using projection data from such an imaging system.
摘要翻译： 提供了一种成像系统，包括产生x射线束的源和接收x射线束的检测器阵列，并且产生与至少对象的扫描部分对应的投影数据。 图像重构器电耦合到所述检测器阵列，并且使用双重迭代重建技术来响应于所述投影数据重建对象的扫描部分的图像以获得完整的视野。 双重迭代重建技术包括使用第一分辨率重构全视野并且使用第二分辨率来重构全FOV内的感兴趣区域。 还提供了一种用于使用来自这种成像系统的投影数据来重建图像的方法。
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公开(公告)号：US08885975B2
公开(公告)日：2014-11-11
申请号：US13531082
申请日：2012-06-22
申请人： Zhou Yu , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Debashish Pal , Lin Fu , Charles A. Bouman , Ken Sauer , Sathish Ramani , Jeffrey A. Fessler , Somesh Srivastava
发明人： Zhou Yu , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Debashish Pal , Lin Fu , Charles A. Bouman , Ken Sauer , Sathish Ramani , Jeffrey A. Fessler , Somesh Srivastava
CPC分类号： G06T11/003 , G06T11/006 , G06T2211/424
摘要： A method is provided for reconstructing an image of an object that includes image elements. The method includes accessing measurement data associated with the image elements, introducing an auxiliary variable to transform an original problem of reconstructing the image to a constrained optimization problem, and solving the constrained optimization problem using a method of multipliers to create a sequence of sub-problems and solve the sequence of sub-problems. Solving the sequence of sub-problems includes reconstructing the image by optimizing a first objective function. The first objective function is optimized by iteratively solving a nested sequence of approximate optimization problems. An inner loop iteratively optimizes a second objective function approximating the first objective function. An outer loop utilizes the solution of the second objective function to optimize the first objective function.
摘要翻译： 提供了一种用于重构包括图像元素的对象的图像的方法。 该方法包括访问与图像元素相关联的测量数据，引入辅助变量以将原始图像重建问题转换为约束优化问题，以及使用乘法器的方法来解决约束优化问题以创建子问题序列 并解决子问题的顺序。 解决子问题的顺序包括通过优化第一目标函数重建图像。 通过迭代求解近似优化问题的嵌套序列，优化了第一个目标函数。 内循环迭代地优化接近于第一目标函数的第二目标函数。 外环利用第二目标函数的解来优化第一目标函数。
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公开(公告)号：US20130343672A1
公开(公告)日：2013-12-26
申请号：US13531082
申请日：2012-06-22
申请人： ZHOU YU , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Debashish Pal , Lin Fu , Charles A. Bouman , Ken Sauer , Sathish Ramani , Jeffrey A. Fessler , Somesh Srivastava
发明人： ZHOU YU , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Debashish Pal , Lin Fu , Charles A. Bouman , Ken Sauer , Sathish Ramani , Jeffrey A. Fessler , Somesh Srivastava
IPC分类号： G06T11/00
CPC分类号： G06T11/003 , G06T11/006 , G06T2211/424
摘要： A method is provided for reconstructing an image of an object that includes image elements. The method includes accessing measurement data associated with the image elements, introducing an auxiliary variable to transform an original problem of reconstructing the image to a constrained optimization problem, and solving the constrained optimization problem using a method of multipliers to create a sequence of sub-problems and solve the sequence of sub-problems. Solving the sequence of sub-problems includes reconstructing the image by optimizing a first objective function. The first objective function is optimized by iteratively solving a nested sequence of approximate optimization problems. An inner loop iteratively optimizes a second objective function approximating the first objective function. An outer loop utilizes the solution of the second objective function to optimize the first objective function.
摘要翻译： 提供了一种用于重构包括图像元素的对象的图像的方法。 该方法包括访问与图像元素相关联的测量数据，引入辅助变量以将原始图像重建问题转换为约束优化问题，以及使用乘法器的方法来解决约束优化问题以创建子问题序列 并解决子问题的顺序。 解决子问题的顺序包括通过优化第一目标函数重建图像。 通过迭代求解近似优化问题的嵌套序列，优化了第一个目标函数。 内循环迭代地优化接近于第一目标函数的第二目标函数。 外环利用第二目标函数的解来优化第一目标函数。
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公开(公告)号：US08135186B2
公开(公告)日：2012-03-13
申请号：US12020311
申请日：2008-01-25
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： Disclosed is an imaging system including a source generating an x-ray beam, a detector array receiving the x-ray beam and generating projection data, a translatable table configured for disposal of an object thereon and operable to translate in relation to the source and the detector array, the source and the detector array rotating about the translatable table to scan the object, and an image reconstructor electrically coupled to the detector array and configured to reconstruct an image in response to the projection data via an iterative reconstruction technique configured to perform a targeted statistical reconstruction.
摘要翻译： 公开了一种成像系统，其包括产生x射线束的源，接收x射线束并产生投影数据的检测器阵列，被配置用于处理其上的物体并可操作以相对于源和/ 检测器阵列，源和检测器阵列围绕可平移表旋转以扫描对象;以及图像重建器，其电耦合到检测器阵列并且被配置为经由被配置为执行以下操作的迭代重建技术响应于投影数据重建图像 有针对性的统计重建。
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公开(公告)号：US20090190814A1
公开(公告)日：2009-07-30
申请号：US12020311
申请日：2008-01-25
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： Disclosed is an imaging system including a source generating an x-ray beam, a detector array receiving the x-ray beam and generating projection data, a translatable table configured for disposal of an object thereon and operable to translate in relation to the source and the detector array, the source and the detector array rotating about the translatable table to scan the object, and an image reconstructor electrically coupled to the detector array and configured to reconstruct an image in response to the projection data via an iterative reconstruction technique configured to perform a targeted statistical reconstruction.
摘要翻译： 公开了一种成像系统，其包括产生x射线束的源，接收x射线束并产生投影数据的检测器阵列，被配置用于处理其上的物体并可操作以相对于源和 检测器阵列，源和检测器阵列围绕可平移表旋转以扫描对象;以及图像重建器，其电耦合到检测器阵列并且被配置为经由被配置为执行以下操作的迭代重建技术响应于投影数据重建图像 有针对性的统计重建。
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7.发明申请公开(公告)号：US20130182946A1
公开(公告)日：2013-07-18
申请号：US13349751
申请日：2012-01-13
申请人： Raja Bala , Zhigang Fan , Hengzhou Ding , Jan P. Allebach , Charles A. Bouman , Reuven J. Sherwin
发明人： Raja Bala , Zhigang Fan , Hengzhou Ding , Jan P. Allebach , Charles A. Bouman , Reuven J. Sherwin
CPC分类号： G06K9/00671 , G06K9/3258
摘要： As set forth herein, a computer-implemented method facilitates pre-analyzing an image and automatically suggesting to the user the most suitable regions within an image for text-based personalization. Image regions that are spatially smooth and regions with existing text (e.g. signage, banners, etc.) are primary candidates for personalization. This gives rise to two sets of corresponding algorithms: one for identifying smooth areas, and one for locating text regions. Smooth regions are found by dividing the image into blocks and applying an iterative combining strategy, and those regions satisfying certain spatial properties (e.g. size, position, shape of the boundary) are retained as promising candidates. In one embodiment, connected component analysis is performed on the image for locating text regions. Finally, based on the smooth and text regions found in the image, several alternative approaches are described herein to derive an overall metric for “suitability for personalization.”
摘要翻译： 如本文所述，计算机实现的方法有助于预分析图像并且自动地向用户建议图像内的最合适的区域用于基于文本的个性化。 具有空间平滑的图像区域和具有现有文本的区域（例如标牌，横幅等）是用于个性化的主要候选者。 这产生了两组相应的算法：一种用于识别平滑区域，一种用于定位文本区域。 通过将图像划分成块并应用迭代组合策略来找到平滑区域，并且满足某些空间属性（例如，边界的大小，位置，形状）的那些区域被保留为有希望的候选者。 在一个实施例中，对用于定位文本区域的图像执行连接分量分析。 最后，基于图像中发现的平滑和文本区域，本文描述了几种替代方法，以得出“适合个性化”的总体度量。
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8.发明申请APPARATUS AND METHOD OF MATCHING SYMBOLS IN A TEXT IMAGE CODING AND DECODING SYSTEM 有权在文本图像编码和解码系统中匹配符号的装置和方法公开(公告)号：US20110158545A1
公开(公告)日：2011-06-30
申请号：US13019400
申请日：2011-02-02
申请人： Hyung-Soo OHK , Jonghyon Yi , Charles A. Bouman , Maribel Figuera
发明人： Hyung-Soo OHK , Jonghyon Yi , Charles A. Bouman , Maribel Figuera
IPC分类号： G06K9/68
CPC分类号： H04N1/4115
摘要： An apparatus of a text image coding and decoding system includes a matching unit to compute a first distance between a symbol of a text image with a reference symbol of a symbol dictionary, to determine whether the symbol matches with the reference symbol according to the first distance and a first reference, and to compute a second distance between the one of the symbols with the reference symbol if the symbol does not match with the reference symbol according to the first distance and the first reference, and to determine whether the symbol matches with the reference symbol according to the second distance and a second reference.
摘要翻译： 文本图像编码和解码系统的装置包括：匹配单元，用于计算文本图像的符号与符号字典的参考符号之间的第一距离，以根据第一距离确定符号是否与参考符号匹配 以及第一参考，并且如果所述符号与所述参考符号不符合所述参考符号，则根据所述第一距离和所述第一参考来计算所述符号中的所述符号之间的第二距离，并且确定所述符号是否与所述参考符号匹配 参考符号根据第二距离和第二参考。
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9.发明申请APPARATUS AND METHOD OF MATCHING SYMBOLS IN A TEXT IMAGE CODING AND DECODING SYSTEM 有权在文本图像编码和解码系统中匹配符号的装置和方法公开(公告)号：US20080175487A1
公开(公告)日：2008-07-24
申请号：US11626543
申请日：2007-01-24
申请人： Hyung-Soo OHK , Jonghyon Yi , Charles A. Bouman , Maribel Figuera
发明人： Hyung-Soo OHK , Jonghyon Yi , Charles A. Bouman , Maribel Figuera
IPC分类号： G06K9/18
CPC分类号： H04N1/4115
摘要： An apparatus of a text image coding and decoding system includes a matching unit to compute a first distance between a symbol of a text image with a reference symbol of a symbol dictionary, to determine whether the symbol matches with the reference symbol according to the first distance and a first reference, and to compute a second distance between the one of the symbols with the reference symbol if the symbol does not match matches with the reference symbol according to the first distance and the first reference, and to determine whether the symbol matches with the reference symbol according to the second distance and a second reference.
摘要翻译： 文本图像编码和解码系统的装置包括：匹配单元，用于计算文本图像的符号与符号字典的参考符号之间的第一距离，以根据第一距离确定符号是否与参考符号匹配 以及第一参考，并且如果符号与参考符号不匹配，则根据第一距离和第一参考，计算具有参考符号的符号之一之间的第二距离，并且确定符号是否与 根据第二距离的参考符号和第二参考。
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公开(公告)号：US07312898B2
公开(公告)日：2007-12-25
申请号：US10285100
申请日：2002-10-31
CPC分类号： H04N1/403 , H04N1/40062 , H04N1/40093 , H04N1/41
摘要： An input image is transformed to produce an output image. First pixels occurring at edges within the input image are detected. Second pixels that are part of text within the input image are also detected. The first pixels and the second pixels are combined to produce the output image.
摘要翻译： 输入图像被变换以产生输出图像。 检测在输入图像内的边缘处出现的第一像素。 也检测到输入图像内的文本的一部分的第二像素。 第一像素和第二像素被组合以产生输出图像。
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