公开(公告)号：WO9846114A3

公开(公告)日：1999-04-08

申请号：PCT/US9807260

申请日：1998-04-10

Applicant: ARETE ASSOCIATES

Inventor： HARKLESS CURT R ,  POTTER RANDALL E ,  MONRO JOHN A JR ,  THEBAUD LAWRENCE R

IPC: G06K9/00 ,  G07C9/00

CPC classification number: G06K9/00 ,  G06K9/0008 ,  G06K9/00087 ,  G06K2009/363 ,  G07C9/00158

Abstract: A sensor receives a print image from an authorized person to form a template (21), and a candidate to form test data (11). Power spectral density (PSD) data for a template (21) and a candidate (11) are compared, to read out rotation and dilation; these are used to adjust the template or candidate preparatory to a correlation to find translation (51). After applying the translation, and refinement of the rotation and dilation, normalized spatial correlation values (NSCSVs) are used to measure the quality of the match (36) and thresholded (41) to make an early rejection (42) or acceptance (43) decision in very clear cases. Where the question is closure, isomorphic adjustment is applied to the entire template or candidate for a fairer comparison in their overlap area.

Abstract translation: 传感器从授权人接收打印图像以形成模板（21）和形成测试数据（11）的候选者。 比较模板（21）和候选（11）的功率谱密度（PSD）数据，以读出旋转和扩张; 这些用于调整模板或候选人准备相关以找到翻译（51）。 在应用翻译和细化旋转和扩张之后，使用归一化空间相关值（NSCSV）来测量匹配（36）和阈值（41）的质量以提早拒绝（42）或接受（43） 决定在非常明确的情况下。 如果问题是关闭，同构调整适用于整个模板或候选人，以便在其重叠区域进行更公平的比较。