Method of setting the time duration of illumination from an LED-based illumination array employed in a digital imaging-based code symbol reader, using an image-processing based illumination metering program executed therewithin
    9.
    发明授权
    Method of setting the time duration of illumination from an LED-based illumination array employed in a digital imaging-based code symbol reader, using an image-processing based illumination metering program executed therewithin 有权
    在基于数字成像的代码符号读取器中使用的基于LED的照明阵列设置照明持续时间的方法,使用在其中执行的基于图像处理的照明计量程序

    公开(公告)号:US07527206B2

    公开(公告)日:2009-05-05

    申请号:US11607114

    申请日:2006-11-30

    IPC分类号: G06K7/10

    摘要: A digital-imaging based code symbol reading system comprising an image sensing array with a field of view (FOV), an illumination subsystem with an LED illumination array, an automatic illumination measurement subsystem, an illumination control subsystem, and programmed imager processor supporting an image-processing based illumination metering program. The automatic illumination measurement subsystem automatically measures the illumination level at a particular region of the FOV and determines the illumination duration necessary to achieve a desired spatial intensity in the detected digital image. The illumination metering program automatically analyzes and measures, in real-time, the spatial intensity distribution of the digital image and determines whether or not a corrected illumination duration is required or desired when detecting the next or subsequent digital images, during the current or subsequent object illumination and imaging cycle. The previously determined illumination duration is over-written with the corrected illumination duration, which is used to drive the illumination subsystem and form and detect one or more subsequent digital images of the illuminated object.

    摘要翻译: 一种基于数字成像的代码符号读取系统,包括具有视场(FOV)的图像感测阵列,具有LED照明阵列的照明子系统,自动照明测量子系统,照明控制子系统和支持图像的编程成像器处理器 基于加工的照明计量程序。 自动照明测量子系统自动测量FOV的特定区域处的照明水平,并确定在检测到的数字图像中实现所需空间强度所需的照明持续时间。 照明测光程序实时自动分析和测量数字图像的空间强度分布,并确定在当前或后续对象中检测下一个或后续数字图像时是否需要或期望校正的照明持续时间 照明和成像周期。 先前确定的照明持续时间用校正的照明持续时间被覆盖,该照明持续时间用于驱动照明子系统并形成和检测被照明物体的一个或多个后续数字图像。