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1. 发明申请

US20060013505A1 Analysis of geometric surfaces by comformal structure 审中-公开
标题翻译：通过共形结构分析几何表面
公开(公告)号：US20060013505A1
公开(公告)日：2006-01-19
申请号：US10534035
申请日：2003-11-06
申请人： Shing-Tung Yau , Xiangfeng Gu , Yalin Wang
发明人： Shing-Tung Yau , Xiangfeng Gu , Yalin Wang
IPC分类号： G06K9/36
CPC分类号： G06K9/00214 , G06K9/00201
摘要： A method for analyzing, classifying, and recognizing geometric surfaces is disclosed. Geometric surfaces are treated as Riemann manifolds and the conformal structure corresponding to the surfaces is calculated. The conformal structure of the surface contains the intrinsic geometric information about the surface, but in a much more compact format as compared to other representations. Conformally mapping the surface to a canonical parameter domain, such as a disk, sphere, or plane retains the geometric information of the surface, and renders the calculation of conformal structure much easier. Various applications enabled by such a conformal representation include surface matching, surface cataloging, surface recognition, animation and morphing between surfaces, and other mathematical analysis.
摘要翻译：公开了一种用于分析，分类和识别几何表面的方法。几何表面被视为Riemann歧管，并且计算对应于表面的共形结构。表面的共形结构包含有关表面的内在几何信息，但与其他表示方式相比，格式更紧凑。将表面映射到规范参数域，例如磁盘，球面或平面保留表面的几何信息，并使得保形结构的计算更容易。通过这种共形表示实现的各种应用包括表面匹配，表面编目，表面识别，表面之间的动画和变形以及其他数学分析。

2. 发明授权

US08861833B2 Simultaneous three-dimensional geometry and color texture acquisition using single color camera 有权
标题翻译：使用单色相机的同时三维几何和颜色纹理采集
公开(公告)号：US08861833B2
公开(公告)日：2014-10-14
申请号：US12388301
申请日：2009-02-18
申请人： Shing-Tung Yau , Song Zhang , Xiangfeng Gu
发明人： Shing-Tung Yau , Song Zhang , Xiangfeng Gu
IPC分类号： G06K9/00 , G06T7/00 , G06T1/00 , G01B11/25
CPC分类号： G01B11/2513 , G06T1/0007 , G06T7/521
摘要： A system for simultaneous real-time three-dimensional geometry and color texture acquisition. The system includes a system processor for generating at least three phase shifted black and white fringe patterns with a phase shift of 2 π/3, a light projector adapted to project the fringe patterns onto an object, the projector being electrically connected with the system processor, and a color camera for capturing the fringe patterns to generate at least three raw fringe images. The fringe images are used to calculate a black and white texture image which is further converted to a color image by employing a demosaicing algorithm. The fringe images are also used to calculate a wrapped phase map that is further processed to generate a continuous unwrapped phase map by employing a phase unwrapping algorithm and the unwrapped phase map is converted to co-ordinates using calibrated system parameters for point-by-point three-dimensional shape measurement.
摘要翻译：一种用于同时实时三维几何和颜色纹理采集的系统。该系统包括一个系统处理器，用于产生相移为2＆pgr / / 3的至少三个相移的黑白条纹图案，适用于将条纹图案投射到物体上的投影仪，投影仪与系统电连接处理器和用于捕获条纹图案的彩色照相机以产生至少三个原始条纹图像。边缘图像用于计算黑白纹理图像，其通过采用去马赛克算法进一步转换成彩色图像。边缘图像还用于计算被包围的相位图，其被进一步处理以通过采用相位展开算法产生连续的展开相位图，并且使用校准的系统参数逐点地将展开的相位图转换为坐标三维形状测量。

3. 发明申请

US20090238449A1 Method and Apparatus for Absolute-Coordinate Three-Dimensional Surface Imaging 有权
标题翻译：绝对坐标三维表面成像方法与装置
公开(公告)号：US20090238449A1
公开(公告)日：2009-09-24
申请号：US12084799
申请日：2006-11-09
申请人： Song Zhang , Shing-Tung Yau , Xianfeng Gu , Yalin Wang , Dale Royer
发明人： Song Zhang , Shing-Tung Yau , Xianfeng Gu , Yalin Wang , Dale Royer
IPC分类号： G06K9/00
CPC分类号： G01B11/2536 , G06T7/521
摘要： A method and associated apparatus for capturing an image of a 3D object (100) which encodes the surface geometry of at least a portion of the object, comprising: 1. projecting (304) a plurality of fringe patterns (312A, 314A) onto the object; 2. capturing (306) phase alterations in reflections of the fringe patterns (312B, 314B) from the object; 3. projecting a uniform image (310A) onto the object; 4. capturing a reflection of the uniform image (310B) from the object; and 5. combining (310) captured phase alterations and captured uniform image reflection on a pixel-by-pixel basis, thereby forming a holoimage representation of the object.
摘要翻译：一种用于捕获对象物的至少一部分的表面几何形状的3D物体（100）的图像的方法和相关联的装置，包括：1.将多个条纹图案（312A，314A）突出（304）到目的; 2.从物体捕获（306）条纹图案（312B，314B）的反射相位变化; 3.将均匀图像（310A）投射到物体上; 从对象中捕获均匀图像（310B）的反射; 并且，以逐像素为基础组合（310）捕获的相位变化和捕获的均匀图像反射，从而形成对象的全息图像表示。

4. 发明授权

US07929751B2 Method and apparatus for absolute-coordinate three-dimensional surface imaging 有权
标题翻译：绝对坐标三维表面成像的方法和装置
公开(公告)号：US07929751B2
公开(公告)日：2011-04-19
申请号：US12084799
申请日：2006-11-09
申请人： Song Zhang , Shing-Tung Yau , Xianfeng Gu , Yalin Wang , Dale Royer
发明人： Song Zhang , Shing-Tung Yau , Xianfeng Gu , Yalin Wang , Dale Royer
IPC分类号： G06K9/00
CPC分类号： G01B11/2536 , G06T7/521
摘要： A method and associated apparatus for capturing an image of a 3D object (100) which encodes the surface geometry of at least a portion of the object, comprising: 1. projecting (304) a plurality of fringe patterns (312A, 314A) onto the object; 2. capturing (306) phase alterations in reflections of the fringe patterns (312B, 314B) from the object; 3. projecting a uniform image (310A) onto the object; 4. capturing a reflection of the uniform image (310B) from the object; and 5. combining (310) captured phase alterations and captured uniform image reflection on a pixel-by-pixel basis, thereby forming a holoimage representation of the object.
摘要翻译：一种用于捕获对象物的至少一部分的表面几何形状的3D物体（100）的图像的方法和相关联的装置，包括：1.将多个条纹图案（312A，314A）突出（304）到目的; 2.从物体捕获（306）条纹图案（312B，314B）的反射相位变化; 3.将均匀图像（310A）投射到物体上; 从对象中捕获均匀图像（310B）的反射; 并且，以逐像素为基础组合（310）捕获的相位变化和捕获的均匀图像反射，从而形成对象的全息图像表示。

5. 发明申请

US20050157913A1 Fingerprint recognition system 审中-公开
公开(公告)号：US20050157913A1
公开(公告)日：2005-07-21
申请号：US11081213
申请日：2005-03-16
申请人： Shing-Tung Yau , Xianfeng Gu , Zhiwu Zhang
发明人： Shing-Tung Yau , Xianfeng Gu , Zhiwu Zhang
IPC分类号： G06K9/00
CPC分类号： G06K9/00067 , G06K9/00073 , G06K9/0008 , G06K9/00087 , G06K9/036
摘要： A method of analyzing and recognizing fingerprint images that utilizes vector processing of a vector field that is defined as the tangential vector of the fingerprint ridge curves is disclosed. The raw fingerprint image is divided into blocks, filtered to remove noise, and the orientation direction of each block is found. This allows the ridge curves to be enhanced and approximated by piece-wise linear approximations. The piece-wise linear approximations to the ridge curves allow the minutiae to be extracted and classified and a fingerprint minutiae template to be constructed. An enrollment process gathers multiple fingerprint images, creates fingerprint minutiae templates corresponding to the acquired fingerprint images, and stores the templates and other data associated with the respective individual or the enrolled fingerprint in a fingerprint database. In an identification process, an unknown raw fingerprint image is obtained via a fingerprint scanner and processed similarly to the enrollment process such that the fingerprint minutiae template of the unknown fingerprint is compared to one or more previously enrolled fingerprint minutiae templates. The identity of the individual associated with the unknown fingerprint is thereby ascertained. In addition, live finger detection can be accomplished in conjunction with the verification or identification process through analysis of the fingerprint image thus enhancing the security of the overall system.

6. 发明申请

US20170186208A1 3D SURFACE MORPHING METHOD BASED ON CONFORMAL PARAMETERIZATION 审中-公开
公开(公告)号：US20170186208A1
公开(公告)日：2017-06-29
申请号：US14980236
申请日：2015-12-28
申请人： SHING-TUNG YAU
发明人： Chin-Tien Wu , Wei-Shou Su , Mei-Heng Yueh , Wen-Wei Lin , Shing-Tung Yau
IPC分类号： G06T13/40 , G06K9/62 , G06K9/00 , G06T15/00
CPC分类号： G06T13/40 , G06K9/00214 , G06K9/00268 , G06K9/00302
摘要： A 3D surface morphing method based on conformal parameterization for creation of 3D animation of facial expressions is revealed. Prepare a 3-dimensional first human face and a 3-dimensional second human face. Prepare a first unit disk and a second unit disk in a two-dimensional surface form, corresponding to the first human face and the second human face respectively. Then use a first mapping unit to map the first human face and the second human face to the first unit disk and the second unit disk respectively. Use a matching module to construct a surface matching function between the two unit disks. Use a second mapping module to map the surface matching function for getting a 3D matching function. Use an interpolation module to compute the 3D matching function multiple times and get a plurality of smooth deformable surfaces between the first human face and the second human face.

7. 发明申请

US20080095413A1 Fingerprint recognition system 审中-公开
标题翻译：指纹识别系统
公开(公告)号：US20080095413A1
公开(公告)日：2008-04-24
申请号：US11643045
申请日：2006-12-19
申请人： Shing-Tung Yau , Xianfeng Gu , Zhiwu Zhang
发明人： Shing-Tung Yau , Xianfeng Gu , Zhiwu Zhang
IPC分类号： G06K9/00
CPC分类号： G06K9/00067 , G06K9/00073 , G06K9/0008 , G06K9/00087 , G06K9/036
摘要： A method of analyzing and recognizing fingerprint images that utilizes vector processing of a vector field that is defined as the tangential vector of the fingerprint ridge curves is disclosed. The raw fingerprint image is divided into blocks, filtered to remove noise, and the orientation direction of each block is found. This allows the ridge curves to be enhanced and approximated by piece-wise linear approximations. The piece-wise linear approximations to the ridge curves allow the minutiae to be extracted and classified and a fingerprint minutiae template to be constructed. An enrollment process gathers multiple fingerprint images, creates fingerprint minutiae templates corresponding to the acquired fingerprint images, and stores the templates and other data associated with the respective individual or the enrolled fingerprint in a fingerprint database. In an identification process, an unknown raw fingerprint image is obtained via a fingerprint scanner and processed similarly to the enrollment process such that the fingerprint minutiae template of the unknown fingerprint is compared to one or more previously enrolled fingerprint minutiae templates. The identity of the individual associated with the unknown fingerprint is thereby ascertained. In addition, live finger detection can be accomplished in conjunction with the verification or identification process through analysis of the fingerprint image thus enhancing the security of the overall system.
摘要翻译：公开了一种分析和识别使用定义为指纹脊曲线的切向矢量的矢量场的矢量处理的指纹图像的方法。原始指纹图像被分成块，过滤以去除噪声，并且找到每个块的取向方向。这允许通过分段线性近似增强和近似脊曲线。对脊曲线的分段线性近似允许提取和分类细节，并构建指纹细节模板。注册过程收集多个指纹图像，创建与所获取的指纹图像相对应的指纹细节模板，并将与相应个体或登记指纹相关联的模板和其他数据存储在指纹数据库中。在识别过程中，通过指纹扫描器获得未知的原始指纹图像，并且与注册过程类似地进行处理，使得将未知指纹的指纹细节模板与一个或多个先前注册的指纹细节模板进行比较。由此确定与未知指纹相关联的个体的身份。此外，通过分析指纹图像可以结合验证或识别过程来实现实时手指检测，从而增强整个系统的安全性。

8. 发明授权

US06876757B2 Fingerprint recognition system 失效
标题翻译：指纹识别系统
公开(公告)号：US06876757B2
公开(公告)日：2005-04-05
申请号：US10156447
申请日：2002-05-28
申请人： Shing-Tung Yau , Xianfeng Gu , Zhiwu Zhang
发明人： Shing-Tung Yau , Xianfeng Gu , Zhiwu Zhang
IPC分类号： G06K9/00
CPC分类号： G06K9/00067 , G06K9/00073 , G06K9/0008 , G06K9/00087 , G06K9/036
摘要： A method of analyzing and recognizing fingerprint images that utilizes vector processing of a vector field that is defined as the tangential vector of the fingerprint ridge curves is disclosed. The raw fingerprint image is divided into blocks, filtered to remove noise, and the orientation direction of each block is found. This allows the ridge curves to be enhanced and approximated by piece-wise linear approximations. The piece-wise linear approximations to the ridge curves allow the minutiae to be extracted and classified and a fingerprint minutiae template to be constructed. An enrollment process gathers multiple fingerprint images, creates fingerprint minutiae templates corresponding to the acquired fingerprint images, and stores the templates and other data associated with the respective individual or the enrolled fingerprint in a fingerprint database. In an identification process, an unknown raw fingerprint image is obtained via a fingerprint scanner and processed similarly to the enrollment process such that the fingerprint minutiae template of the unknown fingerprint is compared to one or more previously enrolled fingerprint minutiae templates. The identity of the individual associated with the unknown fingerprint is thereby ascertained. In addition, live finger detection can be accomplished in conjunction with the verification or identification process through analysis of the fingerprint image thus enhancing the security of the overall system.
摘要翻译：公开了一种分析和识别使用定义为指纹脊曲线的切向矢量的矢量场的矢量处理的指纹图像的方法。原始指纹图像被分成块，过滤以去除噪声，并且找到每个块的取向方向。这允许通过分段线性近似增强和近似脊曲线。对脊曲线的分段线性近似允许提取和分类细节，并构建指纹细节模板。注册过程收集多个指纹图像，创建与所获取的指纹图像相对应的指纹细节模板，并将与相应个体或登记指纹相关联的模板和其他数据存储在指纹数据库中。在识别过程中，通过指纹扫描器获得未知的原始指纹图像，并且与注册过程类似地进行处理，使得将未知指纹的指纹细节模板与一个或多个先前注册的指纹细节模板进行比较。由此确定与未知指纹相关联的个体的身份。此外，通过分析指纹图像可以结合验证或识别过程来实现实时手指检测，从而增强整个系统的安全性。

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