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    • 1. 发明授权
    • Method for omnidirectional processing of 2D images including recognizable characters
    • US08548242B1
    • 2013-10-01
    • US12814019
    • 2010-06-11
    • Andrew Longacre, Jr.
    • Andrew Longacre, Jr.
    • G06K9/00G06K9/34
    • The invention is a method for omnidirectional recognition of recognizable characters in a captured two-dimensional image. An optical reader configured in accordance with the invention searches for pixel groupings in a starburst pattern, and subjects located pixel groupings to a preliminary edge crawling process which records the pixel position of the grouping's edge and records the count of edge pixels. If two similar-sized pixel groupings are located that are of sizes sufficient to potentially represent recognizable characters, then the reader launches “alignment rails” at pixel positions substantially parallel to a centerline connecting the center points of the two similarly sized groupings. A reader according to the invention searches for additional recognizable characters within the rail area, and subjects each located pixel grouping within the rail area to a shape-characterizing edge crawling process for developing data that characterizes the shape of a pixel grouping's edge. After adjusting the orientation representation of the shape-characterizing data the reader compares the developed shape-characterizing data to previously stored shape-characterizing data to determine the character represented by the grouping on the basis of the best fit data.
    • 7. 发明授权
    • Machine readable 2D symbology printable on demand
    • 可读取的2D符号系统按需打印
    • US08011596B2
    • 2011-09-06
    • US12069911
    • 2008-02-13
    • Andrew Longacre, Jr.
    • Andrew Longacre, Jr.
    • G06K19/06
    • G06K19/06037
    • An optically readable two dimensional symbology employed to encode a string of characters belonging to a source string alphabet. The two dimensional symbol can comprise an ordered plurality of printable elements. The printable elements can be arranged in a rectangular array. The printable elements can be positioned on a grid diagonal to the longitudinal axis of the rectangular array, and sequenced according to a pre-defined pattern. Each character of the character string can be encoded into a sequence of printable elements using an encoding scheme comprising at least one code set. A code set can include a plurality of bit sequences. Each bit sequence can correspond to a group of one or more characters of the source string alphabet. Each bit sequence can comprise one or more binary digits. The first binary digit can be encoded by a printable element printed in a printable element position, and a second binary digit can be encoded by a vacant printable element position.
    • 用于编码属于源字符串字母表的字符串的光学可读二维符号系统。 二维符号可以包括有序的多个可打印元件。 可打印元件可以排列成矩形阵列。 可打印元件可以定位在与矩形阵列的纵向轴线对角的网格上,并且根据预定义的图案进行排序。 可以使用包括至少一个代码集的编码方案将字符串的每个字符编码为可打印元素的序列。 代码集可以包括多个比特序列。 每个比特序列可以对应于源字符串字母表的一个或多个字符的组。 每个位序列可以包括一个或多个二进制数字。 第一个二进制数字可以由打印在可打印元素位置的可打印元素进行编码,第二个二进制数字可以由空的可打印元素位置进行编码。
    • 8. 发明授权
    • Indicia reading apparatus having reduced trigger-to-read time
    • 标记读取装置具有减少的触发读取时间
    • US07740176B2
    • 2010-06-22
    • US11545721
    • 2006-10-10
    • Ynjiun P. WangAndrew Longacre, Jr.
    • Ynjiun P. WangAndrew Longacre, Jr.
    • G06K7/10
    • G06K7/14G06K7/10851
    • A TTR time of a reading apparatus can also be reduced by designing an apparatus to exhibit a certain timing relationship between a receipt of a trigger signal and/or more of image capture and decoding. An apparatus in one embodiment can be configured to continuously capture frames of image data prior to receipt of a trigger signal and can further be configured so that an output decoded message is decoded from a frame of image data having a capture initiation time of prior to the time of receipt of a trigger signal. An apparatus configured to output a decoded message from a frame of image data having a capture initiation time of prior to a time of receipt of a trigger signal can have a TTR time of less than a frame capture period of the apparatus.
    • 读取装置的TTR时间也可以通过设计在触发信号的接收和/或更多的图像捕获和解码之间呈现一定的定时关系的装置来减少。 一个实施例中的装置可以被配置为在接收到触发信号之前连续地捕获图像数据帧,并且还可以被配置为使得输出解码消息从具有先前的捕获开始时间之前的图像数据的帧被解码 接收触发信号的时间。 被配置为从具有在接收到触发信号之前的捕获开始时间的图像数据的帧中输出解码消息的装置可以具有小于装置的帧捕获周期的TTR时间。