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1. 发明授权

US07668376B2 Shape feature extraction and classification 有权
标题翻译：形状特征提取和分类
公开(公告)号：US07668376B2
公开(公告)日：2010-02-23
申请号：US11003187
申请日：2004-12-03
申请人： Siming Lin , Kevin M. Crotty , Nicolas Vazquez
发明人： Siming Lin , Kevin M. Crotty , Nicolas Vazquez
IPC分类号： G06K9/46
CPC分类号： G06K9/6292 , G06K9/48
摘要： System and method for analyzing an image. A received image, comprising an object or objects, is optionally preprocessed. Invariant shape features of the object(s) are extracted using a generalized invariant feature descriptor. The generalized invariant feature descriptor may comprise a generalized invariant feature vector comprising components corresponding to attributes of each object, e.g., related to circularity, elongation, perimeter-ratio-based convexity, area-ratio-based convexity, hole-perimeter-ratio, hole-area-ratio, and/or functions of Hu Moment 1 and/or Hu Moment 2. Non-invariant features, e.g., scale and reflection, may be extracted to form corresponding feature vectors. The object is classified by computing differences between the generalized invariant feature vector (and optionally, non-invariant feature vectors) and respective generalized invariant feature vectors corresponding to reference objects, determining a minimum difference corresponding to a closest reference object or class of reference objects of the plurality of reference objects, and outputting an indication of the closest reference object or class as the classification.
摘要翻译：用于分析图像的系统和方法。可选地，包括对象的接收图像被预处理。使用广义不变特征描述符提取对象的不变形状特征。广义不变特征描述符可以包括广义不变特征向量，其包括对应于每个对象的属性的组件，例如与圆度，伸长率，基于周期比的凸度，面积比的凸度，孔周长比，孔 - 面积比和/或胡力矩1和/或胡力矩2的函数。可以提取非恒定特征，例如比例和反射，以形成对应的特征向量。通过计算广义不变特征向量（和可选地，非不变特征向量）与对应于参考对象的相应的广义不变特征向量之间的差异来分类对象，确定对应于最接近的参考对象或参考对象的类别的最小差异多个参考对象，并且输出最接近的参考对象或类的指示作为分类。

2. 发明授权

US07136505B2 Generating a curve matching mapping operator by analyzing objects of interest and background information 有权
标题翻译：通过分析感兴趣的对象和背景信息来生成曲线匹配映射运算符
公开(公告)号：US07136505B2
公开(公告)日：2006-11-14
申请号：US10264059
申请日：2002-10-03
申请人： Lothar Wenzel , Ram Rajagopal , Satish V. Kumar , Darren R. Schmidt , Kevin M. Crotty , Matthew S. Fisher , Dinesh Nair
发明人： Lothar Wenzel , Ram Rajagopal , Satish V. Kumar , Darren R. Schmidt , Kevin M. Crotty , Matthew S. Fisher , Dinesh Nair
IPC分类号： G06K9/00
CPC分类号： G06K9/6204 , G06K9/48
摘要： System and method for determining a mapping operator for use in a pattern matching application, where the mapping operator enhances differences between respective objects of interest and background objects, e.g., objects not of interest. First and second information is received regarding an object of interest and objects that may appear with the object of interest in an acquired target data set, respectively. The mapping operator is determined using the first information and the second information by determining a template discrete curve characterizing the object of interest, determining one or more target discrete curves characterizing the background objects, and generating a mapping operator that enhances differences between the mapped template discrete curve and the mapped target discrete curves. The operator is stored in a memory and is operable to be used in a pattern matching application to locate instances of the object of interest in acquired target data sets or images.
摘要翻译：用于确定在模式匹配应用中使用的映射运算符的系统和方法，其中所述映射运算符增强各个感兴趣对象和背景对象（例如，不感兴趣的对象）之间的差异。接收关于感兴趣的对象的信息和在所获取的目标数据集中可能与感兴趣的对象一起出现的对象的第一和第二信息。使用第一信息和第二信息确定映射运算符，通过确定表征感兴趣对象的模板离散曲线，确定表征背景对象的一个或多个目标离散曲线，以及生成增强映射模板离散化之间的差异的映射运算符曲线和映射的目标离散曲线。操作者被存储在存储器中，并可操作以在模式匹配应用中使用以定位所获取的目标数据集或图像中的感兴趣对象的实例。

3. 发明授权

US07133538B2 Pattern matching utilizing discrete curve matching with multiple mapping operators 有权
公开(公告)号：US07133538B2
公开(公告)日：2006-11-07
申请号：US10263601
申请日：2002-10-03
申请人： Lothar Wenzel , Ram Rajagopal , Satish V. Kumar , Darren R. Schmidt , Kevin M. Crotty , Matthew S. Fisher , Dinesh Nair
发明人： Lothar Wenzel , Ram Rajagopal , Satish V. Kumar , Darren R. Schmidt , Kevin M. Crotty , Matthew S. Fisher , Dinesh Nair
IPC分类号： G06K9/00
CPC分类号： G06K9/6204 , G06K9/48
摘要： System and method for determining the presence of an object of interest in a target image. Regions of a target image may be located that match an object of interest, e.g., in a template image, with respect to various information, e.g., luminance, color and/or other types of boundary information. The invention includes improved methods for mapping point sets or curves to new point sets or curves for curve matching. The method determines the presence of an object of interest in a target image despite of or using various types of topological transformations of the object of interest in the target image. A plurality of mapping operators are determined based on template curves and/or example target curves, e.g., background object curves. Pattern matching is performed on one or more target images using the mapping operators to generate pattern matching results, and the pattern matching results output.

4. 发明授权

US07171048B2 Pattern matching system utilizing discrete curve matching with a mapping operator 有权
标题翻译：模式匹配系统利用与映射算子的离散曲线匹配
公开(公告)号：US07171048B2
公开(公告)日：2007-01-30
申请号：US10263560
申请日：2002-10-03
申请人： Lothar Wenzel , Ram Rajagopal , Satish V. Kumar , Darren R. Schmidt , Kevin M. Crotty , Matthew S. Fisher , Dinesh Nair
发明人： Lothar Wenzel , Ram Rajagopal , Satish V. Kumar , Darren R. Schmidt , Kevin M. Crotty , Matthew S. Fisher , Dinesh Nair
IPC分类号： G06K9/62
CPC分类号： G06K9/6204 , G06K9/6203
摘要： System and method for determining the presence of an object of interest in a target data set. Portions of a target data set may be located that match an object of interest, e.g., in a template data set, with respect to various information, e.g., edge or boundary information. The invention includes improved methods for mapping point sets or curves to new point sets or curves for curve matching. The method determines the presence of an object of interest in a target data set despite of or using various types of topological transformations of the object of interest in the target data set. One or more mapping operators are determined based on template curves and/or example target curves. Pattern matching is performed on one or more target data sets using the mapping operator(s) to generate pattern matching results, and the pattern matching results output.
摘要翻译：用于确定目标数据集中感兴趣对象的存在的系统和方法。目标数据集的部分可以相对于各种信息（例如边缘或边界信息）被定位成匹配感兴趣的对象，例如在模板数据集中。本发明包括用于将点集合或曲线映射到用于曲线匹配的新点集或曲线的改进方法。该方法确定目标数据集中感兴趣对象的存在，尽管在目标数据集中使用或使用目标数据集中的感兴趣对象的各种拓扑变换。基于模板曲线和/或示例目标曲线来确定一个或多个映射运算符。使用映射运算符对一个或多个目标数据集进行模式匹配，以生成模式匹配结果，并且匹配结果输出。

5. 发明授权

US07139432B2 Image pattern matching utilizing discrete curve matching with a mapping operator 有权
公开(公告)号：US07139432B2
公开(公告)日：2006-11-21
申请号：US10264118
申请日：2002-10-03
申请人： Lothar Wenzel , Ram Rajagopal , Satish V. Kumar , Darren R. Schmidt , Kevin M. Crotty , Matthew S. Fisher , Dinesh Nair
发明人： Lothar Wenzel , Ram Rajagopal , Satish V. Kumar , Darren R. Schmidt , Kevin M. Crotty , Matthew S. Fisher , Dinesh Nair
IPC分类号： G06K9/00
CPC分类号： G06K9/6204 , G06K9/48 , G06K9/6203
摘要： System and method for determining the presence of an object of interest in a target image. Regions of a target image may be located that match an object of interest, e.g., in a template image, with respect to various information, e.g., luminance, color and/or other types of boundary information. The invention includes improved methods for mapping point sequences (e.g., pixel sequences) or curves to new point sets or curves for curve matching. The method determines the presence of an object of interest in a target image despite of or using various types of topological transformations of the object of interest in the target image. One or more mapping operators are determined based on template curves and/or example target curves. Pattern matching is performed on one or more target images using the mapping operator(s) to generate pattern matching results, and the pattern matching results output.

6. 发明授权

US07120301B2 Efficient re-sampling of discrete curves 有权
公开(公告)号：US07120301B2
公开(公告)日：2006-10-10
申请号：US10264109
申请日：2002-10-03
申请人： Lothar Wenzel , Ram Rajagopal , Satish V. Kumar , Darren R. Schmidt , Kevin M. Crotty , Matthew S. Fisher , Dinesh Nair
发明人： Lothar Wenzel , Ram Rajagopal , Satish V. Kumar , Darren R. Schmidt , Kevin M. Crotty , Matthew S. Fisher , Dinesh Nair
IPC分类号： G06K9/62
CPC分类号： G06K9/6204 , G06K9/48
摘要： System and method for re-sampling discrete curves, thereby efficiently characterizing point sets or curves in a space. The method may also provide improved means for mapping point sets or curves to new point sets or curves for curve matching. A weight vector or function is determined based on a plurality of discrete curves, e.g., from one or more template data sets or images. The weight function enhances differences between weighted discrete curves. A set of orthonormal polynomials is determined based on the computed weight function, where the set of orthonormal polynomials comprises a set of orthogonal eigenfunctions of a Sturm-Liouville differential equation. Values for a plurality of zeros for one of the set of orthonormal polynomials is determined that comprise resampling points for the plurality of discrete curves. Each of the plurality of discrete curves is resampled based on the determined values of the plurality of zeros.

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