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    • 2. 发明授权
    • System for scanning documents without loss of image data
    • 用于扫描文档而不丢失图像数据的系统
    • US5025483A
    • 1991-06-18
    • US469967
    • 1990-01-25
    • Raymond F. DinanHugh C. FallonJerald R. MalinRobert R. RoditeClair F. RoheGene D. Rohrer
    • Raymond F. DinanHugh C. FallonJerald R. MalinRobert R. RoditeClair F. RoheGene D. Rohrer
    • G06F3/00H04N1/17
    • H04N1/17G06F3/002
    • A document processing system directs documents at a high rate of speed past an optical scanner which captures written information on the documents as video image data. The video image data is directed over a data channel to a host computer system where the data is stored on a mass data storage device for subsequent retrieval. A buffer is provided between the scanner and the data channel, which receives data a rate which varies in relation to the amount of information present on the documents. Data is extracted from the buffer at a rate which is limited by the host computer's channel transfer rate. A control means is associated with the buffer and is operable for controlling a hierarchy of actions ranging from slowing down the incoming data stream to stopping the data stream altogether in order to prevent any loss of video image data due to overfilling of the buffer.
    • 文件处理系统以高速度通过光学扫描器来引导文档,其将文档上的书面信息作为视频图像数据捕获。 视频图像数据通过数据信道被引导到主计算机系统,其中数据被存储在大容量数据存储设备上用于随后的检索。 在扫描器和数据通道之间提供缓冲器,该缓冲器接收数据相对于文档上存在的信息量而变化的速率。 以受主机通道传输速率限制的速率从缓冲器提取数据。 控制装置与缓冲器相关联,并且可操作用于控制动作的层次结构,其范围从进入的数据流的减慢到完全停止数据流,以便防止由于缓冲器的过满而导致的视频图像数据的任何丢失。
    • 10. 发明授权
    • Method and apparatus for dynamically segmenting a bar code
    • 用于动态分割条形码的方法和装置
    • US4608489A
    • 1986-08-26
    • US616822
    • 1984-06-04
    • David A. RamseyClair F. RoheThomas E. Sawicki
    • David A. RamseyClair F. RoheThomas E. Sawicki
    • G06K7/00G06K7/10G06K9/00
    • G06K7/1092
    • A method and apparatus are disclosed for reading a two-dimensional bar code having bars located nominally at predetermined pitch increments. The invention provides a method and apparatus for reading a two-dimensional bar code and dynamically segmenting it into individual bars on a real time basis, as it is read. The segmentation is done on a bar-to-bar basis, and may be adjusted for an individual bar as necessary. The method and apparatus locate the bar data, scan it, and create a profile vector having elements based upon the amount of image data in each scan. The vector is compared to a predetermined stored set of vector elements representing the likelihood that each scan line of image data contains bar image data. Those scan lines of image data corresponding to a bar image are sent to recognition logic and those scan lines of image data corresponding to a space are disregarded.
    • 公开了一种用于读取具有名义上以预定间距增量定位的条的二维条形码的方法和装置。 本发明提供了一种用于读取二维条形码并在读取时将其动态地分段成各个条的实现方法和装置。 分段是按照一个条形的方式进行的,并且可以根据需要针对单独的条进行调整。 该方法和装置定位条形数据,对其进行扫描,并根据每次扫描中的图像数据量创建具有元素的轮廓矢量。 将向量与表示图像数据的每条扫描线包含条形图像数据的似然性的预定存储的矢量元素组进行比较。 对应于条形图像的图像数据的那些扫描线被发送到识别逻辑,并忽略对应于空间的那些扫描线的图像数据。