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Automatically-triggered digital video-imaging based code symbol reading system supporting dynamically controlled object illumination and digital video-imaging operations

  • US 20080061144A1
  • Filed: 06/12/2007
  • Published: 03/13/2008
  • Est. Priority Date: 11/13/2003
  • Status: Active Grant
First Claim
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1. Automatically-triggered digital video-imaging based code symbol reading system supporting dynamically controlled object illumination and digital video-imaging operations, said automatically-triggered digital video-imaging based code symbol reading system comprising:

  • a housing having an imaging window;

    a digital image formation and detection subsystem, disposed within a housing, and having image formation optics for projecting a field of view (FOV) from an area-type image detection array, through said imaging window, and upon the object to be imaged during object illumination and video-imaging operations, and said area-type image detection array detecting frames of digital video image data of the object during said object illumination and video-imaging operations;

    an illumination subsystem, disposed within said housing, and having an illumination array for producing and projecting a field of illumination within said FOV during said object illumination and video-imaging operations;

    an object detection subsystem, disposed in said housing, for automatically detecting the presence of the object in said FOV, and generating a trigger signal indicative of the presence of the object within said FOV;

    an automatic illumination control subsystem, disposed within said housing, for automatically controlling said illumination array during said object illumination and video-imaging operations;

    a digital video frame capturing and buffering subsystem, disposed within said housing, for capturing and buffering said frames of digital video image data in memory, during said object illumination and video-imaging operations;

    a digital video image processing subsystem, disposed in said housing, for processing said frames of digital video image data and reading one or more 1D and/or 2D code symbols graphically represented in said frames of digital video image data, and producing symbol character data representative of said read one or more 1D and/or 2D code symbols;

    an input/output subsystem, disposed in said housing, for transmitting said symbol character data to an external host system or other information receiving or responding device; and

    a system control subsystem, disposed in said housing, responsive to said trigger signal, and for managing in memory, exposure quality threshold (EQT) parameters and said SCPs, and controlling and/or coordinating the operation of said subsystems above.

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