公开(公告)号：US20080101663A1

公开(公告)日：2008-05-01

申请号：US11554861

申请日：2006-10-31

申请人： PETER Z. LO ,  BEHNAM BAVARIAN ,  YING LUO

发明人： PETER Z. LO ,  BEHNAM BAVARIAN ,  YING LUO

IPC分类号： G06K9/00

CPC分类号： G06K9/0008 ,  G06K9/001

摘要： A method for level three feature extraction from a print image extracts features associated with a selected ridge segment using a gray-level image under the guidance of at least one binary image. The level three features are a sequence of vectors each corresponding to a different level three characteristic and each representing a sequence of values at selected points on a print image. The level three features are stored and used for level three matching of two prints. During the matching stage, ridge segments are correlated against each other by shifting or a dynamic programming method to determine a measure of similarity between the print images.

摘要翻译： 用于从打印图像提取三级特征的方法在至少一个二进制图像的引导下使用灰度级图像提取与所选择的脊段相关联的特征。 三级特征是一系列向量，每个矢量各自对应于不同的三级特征，每一个表示在打印图像上的选定点处的值序列。 三级功能被存储并用于两个打印的三级匹配。 在匹配阶段，通过移位或动态规划方法，脊段彼此相关，以确定打印图像之间的相似性度量。

公开(公告)号：US20070292005A1

公开(公告)日：2007-12-20

申请号：US11456622

申请日：2006-07-11

申请人： PETER Z. LO ,  YING LUO

发明人： PETER Z. LO ,  YING LUO

IPC分类号： G06K9/00

CPC分类号： G06K9/0008 ,  G06K9/036

摘要： Print image processing includes generating a first direction image and a multi-resolution hierarchy tree (MRT) having a plurality of direction measures, and adjusting at least one direction measure based on whether it is associated with a singularity area or a non-singularity area of the MRT, to output a final first direction image used for further print image processing. The MRT direction images include the first direction image having a highest resolution and at least one other direction image having a lower resolution. Each direction measure is determined from a direction measure, in a higher resolution direction image, which is selected based on image quality and distance from the boundary between print areas and non-print areas. Upon determining the final first direction image, a consistency measure can be computed and compared to a consistency metric and the method iteratively performed until the consistency measure satisfies the consistency metric.

摘要翻译： 打印图像处理包括生成具有多个方向测量的第一方向图像和多分辨率层次结构树（MRT），并且基于其是否与奇异点区域或非奇异性区域相关联来调整至少一个方向度量 MRT，用于输出用于进一步打印图像处理的最终的第一方向图像。 MRT方向图像包括具有最高分辨率的第一方向图像和具有较低分辨率的至少一个其他方向图像。 从基于图像质量和与打印区域和非打印区域之间的边界的距离选择的更高分辨率方向图像中的方向测量来确定每个方向测量。 在确定最终的第一方向图像之后，可以计算一致性度量并将其与一致性度量进行比较，并且迭代地执行该方法，直到一致性度量满足一致性度量。

公开(公告)号：US20080101662A1

公开(公告)日：2008-05-01

申请号：US11554720

申请日：2006-10-31

申请人： PETER Z. LO ,  YING LUO

发明人： PETER Z. LO ,  YING LUO

IPC分类号： G06K9/00

CPC分类号： G06K9/0008 ,  G06K9/00087

摘要： A method for comparing a search print image comprising a first plurality of minutiae to a file print image comprising a second plurality of minutiae and the apparatus implementing the method is provided. The method includes the steps of: aligning the search and file print images; obtaining the first and second plurality of minutiae, a first plurality of pseudo-ridges generated from a first direction field of the search print image and a second plurality of pseudo-ridges generated from a second direction field of the file print image; for each aligning of the search and file print images, generating a pseudo-ridge score, and determining a minutiae matching score; and providing, based on the pseudo-ridge and minutiae matching scores, an output that indicates a level of similarity between the search and file print images.

摘要翻译： 提供一种将包括第一多个细节的搜索打印图像与包括第二多个细节的文件打印图像和实现该方法的装置进行比较的方法。 该方法包括以下步骤：对齐搜索和文件打印图像; 获取第一和第二多个细节，从搜索打印图像的第一方向域产生的第一多个伪脊和从文件打印图像的第二方向字段产生的第二多个伪脊; 对于搜索和文件打印图像的每个对齐，生成伪脊得分，以及确定细节匹配得分; 并且基于伪脊和细节匹配分数提供指示搜索和文件打印图像之间的相似程度的输出。

公开(公告)号：US20080013803A1

公开(公告)日：2008-01-17

申请号：US11457273

申请日：2006-07-13

申请人： PETER Z. LO ,  BEHNAM BAVARIAN ,  YING LUO

发明人： PETER Z. LO ,  BEHNAM BAVARIAN ,  YING LUO

IPC分类号： G06K9/00

CPC分类号： G06K9/00067 ,  G06K9/036

摘要： A method, apparatus and computer-readable storage element for determining quality of a print image, with the method including the steps of: estimating a centroid point of the physical print; setting dimensions of a quality computation frame based at least on a characteristic of the print image; centering the quality computation frame around the centroid point; determining, within the frame, a set of quality features; and computing a quality measure for the print image based on the set of quality features.

摘要翻译： 一种用于确定打印图像的质量的方法，装置和计算机可读存储元件，方法包括以下步骤：估计物理打印的质心点; 至少基于打印图像的特性设置质量计算帧的尺寸; 围绕质心点的质量计算框中心; 在框架内确定一组质量特征; 以及基于所述一组质量特征来计算所述打印图像的质量度量。

公开(公告)号：US20080273767A1

公开(公告)日：2008-11-06

申请号：US11742793

申请日：2007-05-01

申请人： PETER Z. LO ,  GUIPING YU

发明人： PETER Z. LO ,  GUIPING YU

IPC分类号： G06K9/00

CPC分类号： G06K9/00087 ,  G06K9/6277

摘要： A print identification system performs the following: comparing a primary search print to each of a plurality of file print to generate a primary sorted match report having a first set of file IDs each associated with a first match score; applying a decision logic to the first match scores to determine a status of the corresponding file prints a strong match, a possible match or no match to the search print; for each file print identified as a strong match, compare that file print against file prints identified as a possible match or no match to generate a sub-match report including at least a portion of the first set of file IDs each associated with a second match score; and modifying the primary sorted match report based on at least one of the second match scores to generate a final sorted match report.

摘要翻译： 打印识别系统执行以下操作：将主要搜索打印与多个文件打印中的每一个进行比较以生成具有与第一匹配得分相关联的第一组文件ID的主排序匹配报告; 将决策逻辑应用于第一匹配分数以确定对应文件的状态打印强匹配，可能匹配或不匹配到搜索打印; 对于被识别为强匹配的每个文件打印，将该文件打印与被识别为可能的匹配或不匹配的文件打印进行比较，以生成包括至少一部分与第二匹配相关联的第一组文件ID的子匹配报告 得分了; 以及基于所述第二匹配分数中的至少一个修改所述主排序匹配报告以生成最终排序的匹配报告。

公开(公告)号：US20080279416A1

公开(公告)日：2008-11-13

申请号：US11747499

申请日：2007-05-11

申请人： PETER Z. LO ,  XIAOSHENG SU

发明人： PETER Z. LO ,  XIAOSHENG SU

IPC分类号： G06K9/00

CPC分类号： G06K9/00087

摘要： A system includes an interface receiving a search and file print and a processing device. The processing device performs a method that includes: performing at least one of a first comparison of quality of the search and file prints to a quality threshold, a second comparison of a minutiae matching score for the search and file prints to a minutiae matching score threshold, and a third comparison of a ridge distance of the search and file prints to a ridge distance threshold; determining that a phase correlation between the search and file prints is to be performed based on results of the at least one of the first, second and third comparisons; aligning the search and file prints and performing the phase correlation to calculate a phase correlation score; and modifying the minutiae matching score based on the calculated phase correlation score.

摘要翻译： 系统包括接收搜索和文件打印的接口以及处理装置。 处理装置执行一种方法，其包括：将搜索质量和文件打印的质量的第一比较与质量阈值，搜索和文件打印的细节匹配分数的第二比较与细节匹配分数阈值 以及搜索和文件打印的脊距离与脊距离阈值的第三比较; 基于所述第一，第二和第三比较中的至少一个的结果确定所述搜索和文件打印之间的相位相关性; 对齐搜索和文件打印并执行相位相关以计算相位相关得分; 并根据计算的相位相关分数修改细节匹配得分。

公开(公告)号：US20090169072A1

公开(公告)日：2009-07-02

申请号：US11967515

申请日：2007-12-31

申请人： PETER Z. LO ,  XIANGJIN ZENG

发明人： PETER Z. LO ,  XIANGJIN ZENG

IPC分类号： G06K9/00

CPC分类号： G06K9/001 ,  G06K9/0008

摘要： A system constructs a block direction for a first print and compares the block direction image to a direction image for a second print to determine a similarity measure between the first and second prints. Constructing the block direction image includes: receiving a plurality of minutiae for the first print, with each minutia being associated with a location, a direction and a quality; and for each of the plurality of minutiae, assigning within the block direction image a plurality of corresponding neighboring blocks, and for each neighboring block determining a density rate that is a function of a distance from the neighboring block to the location of the corresponding neighboring minutiae, a block direction that is a function of the density rate and the direction of the corresponding neighboring minutiae, and a block quality that is a function of the density rate and the quality of the corresponding neighboring minutiae.

摘要翻译： 系统构造第一打印的块方向，并将块方向图像与第二打印的方向图像进行比较，以确定第一和第二打印之间的相似性度量。 构建块方向图像包括：接收用于第一打印的多个细节，其中每个细节与位置，方向和质量相关联; 并且对于所述多个细节中的每一个，在所述块方向图像内分配多个对应的相邻块，并且对于每个相邻块，确定作为从所述相邻块到相应的相邻细节的位置的距离的函数的密度率 ，作为密度率和对应的相邻细节的方向的函数的块方向，以及作为密度率和相应的相邻细节的质量的函数的块质量。

公开(公告)号：US20080273769A1

公开(公告)日：2008-11-06

申请号：US11742820

申请日：2007-05-01

申请人： PETER Z. LO ,  GUIPING YU

发明人： PETER Z. LO ,  GUIPING YU

IPC分类号： G06K9/34

CPC分类号： G06K9/00087

摘要： A system includes an interface receiving a search print record including a first direction image of a search print and a file print record including a second direction image of a file print, and a processing device. The processing device performs a method and a computer-readable storage medium stores code for programming a computer to perform the method, which includes: aligning the first and second direction images to identify an overlapping and a non-overlapping area; comparing block direction between the first and second direction images within the overlapping area; performing a rationality analysis on the aligned direction images to at least determine whether one of the direction images and the non-overlapping area of the other direction image are from a different finger; and generating a similarity score based on the block direction comparison and the rationality analysis, which indicates a measure of similarity between the search and file prints.

摘要翻译： 一种系统，包括接收包括搜索打印的第一方向图像和包括文件打印的第二方向图像的文件打印记录的搜索打印记录的界面和处理装置。 处理装置执行方法，并且计算机可读存储介质存储用于对计算机进行编程以执行该方法的代码，其包括：对准第一和第二方向图像以识别重叠区域和非重叠区域; 比较重叠区域内的第一和第二方向图像之间的块方向; 对对准的方向图像进行合理性分析，以至少确定另一方向图像的方向图像和非重叠区域中的一个是否来自不同的手指; 并且基于块方向比较和合理性分析生成相似性分数，其指示搜索和文件打印之间的相似度的度量。