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    Apparatus and method for automatic gain control during scanning
    21.
    发明公开
    Apparatus and method for automatic gain control during scanning 有权
    装置和方法用于在扫描过程中自动增益控制

    公开(公告)号：EP1717729A3

    公开(公告)日：2007-03-14

    申请号：EP06076121.0

    申请日：2003-09-02

    Applicant: MICROSCAN SYSTEMS INCORPORATED

    Inventor： Kolstad, Jesse J.

    IPC: G06K7/10

    CPC classification number: G06K7/10851

    Abstract: The disclosure describes an apparatus and method for automatic gain control during scanning. The apparatus comprises an optical detector (206) to receive an optical signal reflected from a symbol (214) positioned within a scan window (215) by an optical beam (212) scanned from a leading edge (218) of the scan window (215) to a trailing edge (220) of the scan window; and a processor coupled (208) to the optical detector to adjust the gain of the optical detector during the beam scan. The process comprises receiving an optical signal using an optical detector (206), wherein the optical signal comprises optical energy reflected from a symbol positioned in a scan window as an optical beam scans from a leading edge of the scan window to a trailing edge of the scan window, and adjusting the gain of the optical detector during receipt of the optical signal. A calibration process is disclosed comprising calibrating the optical detector to obtain a plurality of gain corrections, each gain correction corresponding to a different position between a leading edge and a trailing edge of a scan window, and storing the plurality of gain corrections.

    BARCODE SCANNER WITH LINEAR AUTOMATIC GAIN CONTROL (AGC), MODULATION TRANSFER FUNCTION DETECTOR, AND SELECTABLE NOISE FILTER
    22.
    发明公开
    BARCODE SCANNER WITH LINEAR AUTOMATIC GAIN CONTROL (AGC), MODULATION TRANSFER FUNCTION DETECTOR, AND SELECTABLE NOISE FILTER 有权
    带线性自动增益控制（AGC），调制传递函数检测器和可选择的噪声滤波器条形码扫描器

    公开(公告)号：EP1741046A2

    公开(公告)日：2007-01-10

    申请号：EP05731262.1

    申请日：2005-04-04

    Applicant: MICROSCAN SYSTEMS INCORPORATED

    Inventor： KOLSTAD, Jesse, J. ,  DAVIS, Bryan, L.

    IPC: G06K7/10

    CPC classification number: G06K7/10851

    Abstract: According to embodiments of the present invention, a barcode scanner platform is provided in which the gain of an analog signal representative of a barcode is controlled using a control loop. In embodiments, an MTF detector generates a value (e.g., DC) representative of a low frequency portion (wide or out of optical focus elements) of the analog signal and a second value (e.g., DC) representative of a high frequency portion (narrow elements or in optical focus elements) of the analog signal. The processor uses the first and the second values and a reference amplitude to determine a gain IE signal. The processor provides the gain signal to an AGC circuit that provides a linear response to the gain signal using matched JFETs. A noise filter can be enabled or disabled based on the first value, the second value, and/or the barcode scanner platform read rate.

    APPARATUS AND PROCESS FOR TWO-STAGE DECODING OF HIGH-DENSITY OPTICAL SYMBOLS
    25.
    发明公开
    APPARATUS AND PROCESS FOR TWO-STAGE DECODING OF HIGH-DENSITY OPTICAL SYMBOLS 有权
    DEVICE AND METHOD FOR TWO级解码的高密度光学符号

    公开(公告)号：EP1861810A1

    公开(公告)日：2007-12-05

    申请号：EP06738674.8

    申请日：2006-03-17

    Applicant: MICROSCAN SYSTEMS INCORPORATED

    Inventor： LIU, Robert, M.

    IPC: G06K7/14 ,  G06K7/10

    CPC classification number: G06K7/14 ,  G06K7/1469 ,  G06K7/1478 ,  G06K7/1486

    Abstract: A process comprising computing a histogram of pixel intensity data collected from a digital image of an optically readable symbol including light and dark elements, thresholding the histogram to classify individual pixels as light pixels, dark pixels or gray pixels, thresholding only the portion of the histogram corresponding to gray pixels to re-classify the gray pixels into dark pixels, light pixels or unresolved gray pixels, and heuristically analyzing each string of unresolved gray pixels to determine the elements of the optically readable symbol that created the string of unresolved gray pixels. An apparatus and system to implement the process.

    Apparatus and method for automatic gain control during scanning
    27.
    发明公开
    Apparatus and method for automatic gain control during scanning 有权
    Verfahren zum Erhalt vonVerstärkungskorrekturen

    公开(公告)号：EP1717729A2

    公开(公告)日：2006-11-02

    申请号：EP06076121.0

    申请日：2003-09-02

    Applicant: MICROSCAN SYSTEMS INCORPORATED

    Inventor： Kolstad, Jesse J.

    IPC: G06K7/10

    CPC classification number: G06K7/10851

    Abstract: The disclosure describes an apparatus and method for automatic gain control during scanning. The apparatus comprises an optical detector (206) to receive an optical signal reflected from a symbol (214) positioned within a scan window (215) by an optical beam (212) scanned from a leading edge (218) of the scan window (215) to a trailing edge (220) of the scan window; and a processor coupled (208) to the optical detector to adjust the gain of the optical detector during the beam scan. The process comprises receiving an optical signal using an optical detector (206), wherein the optical signal comprises optical energy reflected from a symbol positioned in a scan window as an optical beam scans from a leading edge of the scan window to a trailing edge of the scan window, and adjusting the gain of the optical detector during receipt of the optical signal. A calibration process is disclosed comprising calibrating the optical detector to obtain a plurality of gain corrections, each gain correction corresponding to a different position between a leading edge and a trailing edge of a scan window, and storing the plurality of gain corrections.

    Abstract translation: 本公开描述了一种用于扫描期间自动增益控制的装置和方法。 该装置包括光学检测器（206），用于通过从扫描窗口（215）的前沿（218）扫描的光束（212）接收从位于扫描窗口（215）内的符号（214）反射的光信号， ）到扫描窗口的后缘（220）; 以及耦合到所述光学检测器的处理器（208），以在所述光束扫描期间调节所述光学检测器的增益。 该过程包括使用光学检测器（206）接收光学信号，其中当光束从扫描窗口的前沿扫描到扫描窗口的前沿时，光信号包括从位于扫描窗口中的符号反射的光能量 扫描窗口，以及在接收光信号期间调整光学检测器的增益。 公开了一种校准过程，包括校准光学检测器以获得多个增益校正，每个增益校正对应于扫描窗口的前沿和后沿之间的不同位置，并存储多个增益校正。

    CAMERA POSITIONING AND CONFIRMATION FEEDBACK SYSTEM
    28.
    发明公开
    CAMERA POSITIONING AND CONFIRMATION FEEDBACK SYSTEM 无效
    SYSTEM FOR摄像机定位和确认反馈

    公开(公告)号：EP1466292A1

    公开(公告)日：2004-10-13

    申请号：EP03703870.0

    申请日：2003-01-16

    Applicant: MICROSCAN SYSTEMS INCORPORATED

    Inventor： ZOSEL, Andrew, J. ,  BARNES, Danny, S. ,  ALLEN, Matthew, E.

    IPC: G06K7/10

    CPC classification number: G06K7/10881 ,  G06K2207/1011

    Abstract: An apparatus (10) is disclosed comprising a base capable of receiving a camera including a lens, and a projector coupled to the base and adapted to project a plurality of beams of light 12, 14) onto a plane positioned at a focus distance from the base, wherein the projections of the beams of light on the plane are geometric shapes (16, 18), and wherein an intersection of the geometric shapes is at the center of the field of view of the lens when the lens is installed on the base. In addition, an apparatus is disclosed comprising a base capable of receiving a camera including a lens, an image processor capable of being coupled to the camera for processing an image of a target captured by the camera, and a confirmation projector coupled to the image processor, wherein the projector projects a confirmation beam onto the plane of the target when the image processor signals the confirmation projector that it has processed the image.

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