System for embedded digital data that allows embedding of data around known obstructions
    1.
    发明授权
    System for embedded digital data that allows embedding of data around known obstructions 有权
    用于嵌入式数字数据的系统,允许在已知障碍物周围嵌入数据

    公开(公告)号:US06641051B1

    公开(公告)日:2003-11-04

    申请号:US09404755

    申请日:1999-09-24

    IPC分类号: G06K1906

    CPC分类号: B41M5/00

    摘要: A system for printing glyph frames around known obstructions. All frames in an area are determined to be obstructed or unobstructed, based on their location with respect to other printed areas. The unobstructed locations can be numbered and glyph data printed within. In the alternative, the good locations can be numbered modulo some number much smaller that the number of available locations to provide redundancy. The unobstructed locations can be stored in either the sync lines or in the data area of other locations known to be unobstructed. Also, the frame itself can be identified as obstructed or unobstructed to provide more redundancy.

    摘要翻译: 用于在已知障碍物周围打印字形框架的系统。 基于它们相对于其他印刷区域的位置,确定区域中的所有框架被阻挡或不阻塞。 无阻碍的位置可以编号,字形数据打印在其中。 在替代方案中,良好的位置可以被编号成一些数量小得多的可用位置的数量来提供冗余。 无阻塞的位置可以存储在已知无阻碍的其他位置的同步线或数据区中。 此外,框架本身可以被识别为阻塞或不阻塞以提供更多的冗余。

    High frequency masking of embedded digital data to improve appearance
    2.
    发明授权
    High frequency masking of embedded digital data to improve appearance 有权
    高频屏蔽嵌入式数字数据,改善外观

    公开(公告)号:US06427920B1

    公开(公告)日:2002-08-06

    申请号:US09404961

    申请日:1999-09-24

    IPC分类号: G06K1906

    CPC分类号: G06K19/06

    摘要: A specific bit pattern (or set of bit patterns) that have particular frequency and length requirements is used to remove low-frequency, visually observable structure from rendered embedded digital data. In use, the pattern is replicated enough times to be able to XOR with the data before rendering as glyphs, or the like. On decoding (reading), the read data is XOR'd again to recover the original data.

    摘要翻译: 具有特定频率和长度要求的特定位模式(或一组位模式)用于从渲染的嵌入式数字数据中去除低频,可视化的结构。 在使用中,该模式被复制足够多的时间,以便能够在以字形呈现之前将数据进行异或等等。 在解码(读取)时,再次读取数据以恢复原始数据。