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    • 2. 发明授权
    • Method and apparatus for a portable non-contact label imager
    • 用于便携式非接触式标签成像器的方法和装置
    • US5821518A
    • 1998-10-13
    • US718612
    • 1996-09-23
    • John William SussmeierLuis FigarellaPaul Pay-Lun Ju
    • John William SussmeierLuis FigarellaPaul Pay-Lun Ju
    • G06K7/10
    • G06K7/1092G06K7/10881
    • A portable non-contact label imager captures an image of two-dimensional information indicia on a label. The captured image data is decoded by a decoder. The label imager forms a part of a data terminal, which includes a keypad, display and signature capture pad. Upon receipt of a start signal from the data terminal's circuitry, the label imager automatically carries out the steps required to capture the label information indicia. The label imager provides aiming indicia to allow the user to properly aim the camera. A position sensing device determines when the target label is within the camera's depth of field. At that time, the label imager determines the shutter speed required for a correct exposure by measuring the light reflected from the label. The label imager then captures the label image, which is decoded by the decoder. Corresponding output data is then provided to the data terminal.
    • 便携式非接触式标签成像仪在标签上捕获二维信息标记的图像。 捕获的图像数据由解码器解码。 标签成像器形成数据终端的一部分,其包括键盘,显示和签名捕获板。 在从数据终端的电路接收到起始信号时,标签成像器自动执行捕获标签信息标记所需的步骤。 标签成像器提供瞄准标记,以允许用户正确瞄准相机。 位置检测装置确定目标标签何时在相机的景深范围内。 此时,标签成像器通过测量从标签反射的光来确定正确曝光所需的快门速度。 标签成像器然后捕获由解码器解码的标签图像。 然后将相应的输出数据提供给数据终端。
    • 3. 发明授权
    • Method and apparatus for decoding bar code symbols using subpixel
interpolation
    • 使用子像素内插解码条形码符号的方法和装置
    • US5550365A
    • 1996-08-27
    • US215900
    • 1994-03-22
    • Mihael KlancnikLuis Figarella
    • Mihael KlancnikLuis Figarella
    • G06K7/10
    • G06K7/1092G06K7/1093G06K7/1443G06K7/1456G06K7/1465G06K7/1469
    • A system for decoding a bar code symbol receives a signal representative of the symbol and searches the signal in one dimension to locate two adjacent critical points corresponding to an element of the symbol. The system also computes a value representative of the signal energy between the two critical points and determines the width of the element in accordance with the value.A bar code symbol decoding system receives a signal representative of a bar code symbol having a plurality of characters, one of which is a checksum character. The system determines a first choice for each of the characters and a second choice for at least one of the characters from the signal. The system performs checksum analysis in accordance with the first choice for each of the characters. If that checksum analysis is not satisfied, then the system performs checksum analysis using the second choice.
    • 用于解码条形码符号的系统接收表示符号的信号,并且在一维中搜索信号以定位对应于符号的元素的两个相邻临界点。 系统还计算代表两个临界点之间的信号能量的值,并根据该值确定元件的宽度。 条形码符号解码系统接收表示具有多个字符的条形码符号的信号,其中一个是校验和字符。 系统为每个字符确定第一选择,并且从该信号确定至少一个字符的第二选择。 系统根据每个字符的首选来执行校验和分析。 如果不满足校验和分析,则系统使用第二选择执行校验和分析。
    • 8. 发明授权
    • Method and apparatus for decoding bar code symbols along search steps
    • 沿搜索步骤解码条形码符号的方法和装置
    • US5478999A
    • 1995-12-26
    • US250663
    • 1994-05-27
    • Luis FigarellaMihael Klancnik
    • Luis FigarellaMihael Klancnik
    • G06K7/10G06K7/14
    • G06K7/14G06K7/1093G06K7/1443G06K7/1456G06K7/1465G06K7/1469G06K7/1486G06K7/1491
    • A system for detecting a bar code symbol receives a two-dimensional image containing the symbol, where the system has no a priori knowledge of the orientation of the symbol in the image. The system scans the image in one dimension to locate a quiet zone for the symbol and searches the image in one dimension to identify a start/stop character of the symbol. A system for decoding a bar code symbol having a plurality of elements receives a signal representative of the symbol. The system searches the signal along a first search step to characterize the width of one of the elements. The system then selects a second search step by projecting from the first search step onto a reference line, where the reference line is not parallel to either the first or second search steps. The system then searches the signal along the second search step to characterize the width of another of the elements. A system for decoding a bar code symbol having at least three elements receives a signal representative of the symbol. The system characterizes a first set of two or more elements by searching the signal along a first search step. The system also characterizes a second set of two or more elements by searching the signal along a second search step, where the first set and the second set have an element in common and where the first and second search steps are not collinear.
    • 用于检测条形码符号的系统接收包含该符号的二维图像,其中该系统不具有图像中符号的取向的先验知识。 系统在一个维度上扫描图像以找到符号的安静区域,并在一个维度上搜索图像,以识别符号的开始/停止字符。 用于解码具有多个元素的条形码符号的系统接收表示符号的信号。 系统沿着第一搜索步骤搜索信号以表征其中一个元素的宽度。 然后,系统通过从第一搜索步骤投影到参考线上来选择第二搜索步骤,其中参考线不平行于第一或第二搜索步骤。 然后,系统沿着第二搜索步骤搜索信号以表征另一个元素的宽度。 用于解码具有至少三个元件的条形码符号的系统接收代表该符号的信号。 该系统通过沿着第一搜索步骤搜索信号来表征第一组两个或更多个元件。 该系统还通过沿着第二搜索步骤搜索信号来表征第二组两个或更多个元件,其中第一组和第二组具有共同的元件,并且第一和第二搜索步骤不共线。