公开(公告)号：WO2003049023A1

公开(公告)日：2003-06-12

申请号：PCT/SE2002/002233

申请日：2002-12-05

Applicant: ANOTO AB ,  PETTERSSON, Mats, Petter

Inventor： PETTERSSON, Mats, Petter

IPC: G06K19/06

CPC classification number: G06T3/00 ,  G06K7/14 ,  G06K9/222 ,  G06K9/228 ,  G06K9/36 ,  G06K2009/226 ,  G06K2009/363

Abstract: A method aims at identifying, starting from objects in a digital image, a virtual raster included in a coding pattern. The objects in the image at least partially reproduce marks on a base, each mark being associated with a respective point of intersection of raster lines belonging to the virtual raster. The method comprises the steps of matching sets of objects against a cell unit, which corresponds to a recurring known basic element of said raster; when a set corresponds with the cell unit, identifying the objects in the set as approved; and reconstructing the virtual raster on the basis of the mutual arrangement of the approved objects. A computer program, a storage medium and a device for position determination are also described.

Abstract translation: 一种方法旨在从数字图像中的对象开始识别包括在编码模式中的虚拟光栅。 图像中的对象至少部分地再现基座上的标记，每个标记与属于虚拟光栅的光栅线的相应交点相关联。 该方法包括以下步骤：将对象集合对应于对应于所述光栅的重复已知基本元素的单元单元; 当集合对应于小区单元时，将集合中的对象标识为已批准; 并且基于所批准的对象的相互排列重构虚拟光栅。 还描述了计算机程序，存储介质和用于位置确定的装置。

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。