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公开(公告)号:US07027649B1
公开(公告)日:2006-04-11
申请号:US09722982
申请日:2000-11-27
IPC分类号: G06K9/46
CPC分类号: G06K9/52
摘要: An Euler number representation of a binary image is calculated. The binary image is considered as a series of partial images. The Euler number for each partial image is calculated using properties of runs of zeros and ones in the pixel matrix, and the results are combined together. The operations may be performed sequentially or in parallel. The calculations may be performed using discrete logic components for on-chip VLSI implementations.
摘要翻译: 计算二进制图像的欧拉数表示。 二进制图像被认为是一系列部分图像。 使用像素矩阵中的零和运行的属性来计算每个部分图像的欧拉数,并将结果组合在一起。 可以顺序地或并行地执行操作。 可以使用用于片上VLSI实现的离散逻辑组件来执行计算。
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公开(公告)号:US07359532B2
公开(公告)日:2008-04-15
申请号:US10734335
申请日:2003-12-11
申请人: Tinku Acharya , Bhargab B. Bhattacharya , Arindam Biswas , Partha Bhowmick , Arijit Bishnu , Sandip Das , Malay K. Kundu , Chivukula A. Murthy , Subhas C. Nandy
发明人: Tinku Acharya , Bhargab B. Bhattacharya , Arindam Biswas , Partha Bhowmick , Arijit Bishnu , Sandip Das , Malay K. Kundu , Chivukula A. Murthy , Subhas C. Nandy
IPC分类号: G06K9/00
CPC分类号: G06K9/00087
摘要: Disclosed is a method and apparatus to provide for fingerprint minutiae matching using scoring techniques. A plurality of minutiae in a fingerprint image is defined. A score associated with each minutia corresponding to the validity of each minutia is estimated. The fingerprint image is then matched against one or more sample fingerprint images utilizing a partial point set pattern matching (PSPM) algorithm.
摘要翻译: 公开了一种使用评分技术提供指纹细节匹配的方法和装置。 定义指纹图像中的多个细节。 估计与每个细节的有效性对应的每个细节相关联的分数。 然后使用部分点集模式匹配(PSPM)算法将指纹图像与一个或多个样本指纹图像进行匹配。
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公开(公告)号:US06681060B2
公开(公告)日:2004-01-20
申请号:US09817000
申请日:2001-03-23
IPC分类号: G06K954
CPC分类号: G06F17/30256 , Y10S707/99936
摘要: A Mahalanobis distance measure is used to identify a query image among plural images in a database. The measure may be used to rank the similarity of one or more images to the query image. A variance-covariance matrix is calculated for all images in the database. The variance-covariance matrix is used to calculate the Mahalanobis distance between the query image and one or more images in the database. A range tree may be used to identify likely image candidates for performing the Mahalanobis distance measurement.
摘要翻译: 马哈拉诺比斯距离度量用于识别数据库中的多个图像之间的查询图像。 该度量可用于对一个或多个图像与查询图像的相似性进行排序。 对数据库中的所有图像计算方差 - 协方差矩阵。 方差协方差矩阵用于计算查询图像与数据库中一个或多个图像之间的马氏距离。 可以使用范围树来识别用于执行马哈拉诺比斯距离测量的可能的图像候选。
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公开(公告)号:US06738520B1
公开(公告)日:2004-05-18
申请号:US09597354
申请日:2000-06-19
申请人: Tinku Acharya , Bhargab Bikram Bhattacharya , Malay Kumar Kundu , Suman Kumar Mitra , Chivukula A. Murthy
发明人: Tinku Acharya , Bhargab Bikram Bhattacharya , Malay Kumar Kundu , Suman Kumar Mitra , Chivukula A. Murthy
IPC分类号: G06K936
CPC分类号: G06T9/001
摘要: Several embodiments in accordance with the invention are disclosed. An embodiment for compressing a gray scale image is described and an embodiment for decompressing the codebook produced by compressing the gray scale image is described. Of course, the invention is not limited to only gray scale images, however.
摘要翻译: 公开了根据本发明的几个实施例。 描述了用于压缩灰度图像的实施例,并且描述了用于解压缩通过压缩灰度图像产生的码本的实施例。 当然,本发明并不仅限于灰度图像。
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