Digital image capture and processing system employing an image formation and detection subsystem having an area-type image detection array supporting periodic occurrance of snap-shot type image acquisition cycles at a high-repetition rate during object illumination

• US 8,047,438 B2
• Filed: 01/31/2008
• Issued: 11/01/2011
• Est. Priority Date: 11/13/2003
• Status: Active Grant

• Current Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Original Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Inventors: Foney, Shawn De, Zhu, Xiaoxun, Veksland, Michael, Ren, Jie, Knowles, C. Harry, Au, Ka Man, Giordano, Patrick, Allen, Christopher, Yan, Weizhen, Smith, Taylor, Mandal, Sudhin, Wilz, David M. Sr., Kotlarsky, Anatoly, Miraglia, Michael V.
• Primary Examiner(s): Kim; Ahshik
• Application Number:
  US12/012,203
• Publication Number:
  US 20090020610A1
• Time in Patent Office: 1,370 Days
• Field of Search: 235/462.2, 235/462.01, 235/462.09, 235/462.24
• US Class Current: 235/462.2
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: G06K 7/10752 Exposure time control
• CPC Class Codes: G06K 7/10821 further details of bar or optical code scanning devices
• CPC Class Codes: G06K 7/109 adaptations to make the hand-held scanner useable as a fixed scanner

Abstract

A digital image capture and processing system including a housing having an imaging window; and an image formation and detection subsystem with an area-type image detection array having a periodic snap shot mode of the operation supporting the periodic occurrence of snap-shot type image acquisition cycles at a high-repetition rate, during object illumination and imaging operations. The system also includes an illumination subsystem, with a LED illumination array, for producing a field of illumination within the FOV, and illuminating the object detected in the FOV. In the illustrative embodiment, the time duration of illumination of an object within the FOV by the illumination subsystem while the area-type image detection array detects each 2D digital image frame of the object formed on the area-type image detection array, is substantially equal to the time duration that the digital image processing subsystem is allowed to process the detected 2D digital image frame and read a 1D and/or 2D code symbol graphically represented therein.

Claims

1. A digital image capture and processing system comprising:

a housing having an imaging window;

an area-type image formation and detection subsystem, disposed in said housing, and having image formation optics for projecting a field of view (FOV) through said imaging window and an area-type image detection array having a periodic snap shot mode of the operation, supporting the periodic occurrence of snap-shot type image acquisition cycles at a high-repetition rate of at least ten 2D digital image frames per second, during object illumination and imaging operations;

an illumination subsystem, disposed in said housing, including an illumination array for producing a field of illumination within said FOV, and illuminating said object detected in said FOV, so that said illumination reflects off said object and is transmitted back through said imaging window and onto said area-type image detection array to form a 2D digital image frame of said object on said area-type image detection array during each said snap-shot type image acquisition cycle;

an image capturing and buffering subsystem, disposed in said housing, for capturing and buffering 2D digital image frames detected by said area-type image formation and detection subsystem;

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

a system control subsystem, disposed in said housing, for controlling and/or coordinating one or more of said subsystems during object illumination and imaging operations, such that the time duration of illumination of said object within said FOV by said illumination subsystem while said area-type image detection array detects each 2D digital image frame of said object formed on said area-type image detection array, is substantially equal to the time duration that said digital image processing subsystem is allowed to process said detected 2D digital image frame and read a 1D and/or 2D code symbol graphically represented in said detected 2D digital image frame.

2. The digital image capture and processing system of claim 1, wherein the time duration of each said snap-shot image acquisition cycle is approximately 30 milliseconds, and wherein the time duration of each said digital image processing cycle by said digital image processing subsystem is also approximately 30 milliseconds.

3. The digital image capture and processing system of claim 1, which further comprises an input/output subsystem, disposed in said housing, for outputting processed image data, including symbol character data, to an external host system or other information receiving or responding device.

4. The digital image capture and processing system of claim 1, which further comprises an automatic object detection subsystem, disposed in said housing, for automatically detecting the presence of said object within said FOV, and generating a trigger event in response to the detection of said object.

5. The digital image capture and processing system of claim 4, which further comprises an object targeting illumination subsystem, disposed in said housing, for generating and projecting a targeting illumination beam within a portion of said FOV, in response to the generation of said trigger event.

6. The digital image capture and processing system of claim 1, wherein an object detection subsystem is disposed in said housing, for automatically detecting the presence of said object within said FOV and generating a trigger event.

7. The digital image capture and processing system of claim 1, which further comprises a manually actuatable trigger switch integrated with said housing, for generating a trigger event upon an operator manually actuating said manually actuatable trigger switch, indicative that the object is present within said FOV.

8. The digital image capture and processing system of claim 5, wherein said targeting illumination beam is momentarily switched off while said illumination array is producing said field of illumination within said FOV and said area-type image detection array is detecting a 2D digital image frame of said detected object within said FOV, during object illumination and imaging operations.

9. The digital image capture and processing system of claim 1, wherein said illumination array comprises an LED illumination array having a plurality of LEDs.

10. The digital image capture and processing system of claim 1, wherein said housing is capable of being supported within the hand of an operator.

11. The digital image capture and processing system of claim 1, wherein said housing is capable of being supported on said countertop surface.

12. The digital image capture and processing system of claim 1, wherein said 1D and/or 2D code symbols are selected from the group of 1D and/or 2D bar code symbols, PDF symbols and data matrix symbols.

13. A digital image capture and processing system comprising:

a housing having an imaging window;

an area-type image formation and detection subsystem, disposed in said housing, and having image formation optics for projecting a field of view (FOV) through said imaging window and an area-type image detection array having a periodic snap shot mode of the operation, supporting the periodic occurrence of snap-shot type image acquisition cycles at a nigh-repetition rate of at least ten 2D digital image frames per second, during object illumination and imaging operations;

an illumination subsystem, disposed in said housing, including an illumination array for producing a field of illumination within said FOV, and illuminating said object detected in said FOV, so that said illumination reflects off said object and is transmitted back through said imaging window and onto said area-type image detection array to form a 2D digital image frame of said object on said area-type image detection array during each said snap-shot type image acquisition cycle;

an image capturing and buffering subsystem, disposed in said housing, for capturing and buffering 2D digital image frames detected by said area-type image formation and detection subsystem;

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

a system control subsystem, disposed in said housing, for controlling and/or coordinating one or more of said subsystems during object illumination and imaging operations.

14. The digital image capture and processing system of claim 13, wherein the time duration of each said snap-shot type image acquisition cycle is approximately 30 milliseconds, and wherein the time duration of each digital image processing cycle by said digital image processing subsystem is also approximately 30 milliseconds.

15. The digital image capture and processing system of claim 13, which further comprises an input/output subsystem, disposed in said housing, for outputting processed image data, including symbol character data to an external host system or other information receiving or responding device.

16. The digital image capture and processing system of claim 13, which further comprises an automatic object detection subsystem, disposed in said housing, for automatically detecting the presence of said object within said FOV, and generating a trigger event in response to the detection of said object.

17. The digital image capture and processing system of claim 13, which further comprises an object targeting illumination subsystem, disposed in said housing, for generating and projecting a targeting illumination beam within a portion of said FOV, in response to the generation of said trigger event.

18. The digital image capture and processing system of claim 13, wherein an object detection subsystem is disposed in said housing, for automatically detecting the presence of said object within said FOV and generating a trigger event.

19. The digital image capture and processing system of claim 13, which further comprises a manually actuatable trigger switch integrated with said housing, for generating a trigger event upon an operator manually actuating said manually actuatable trigger switch, indicative that the object is present within said FOV.

20. The digital image capture and processing system of claim 17, wherein said targeting illumination beam is momentarily switched off while said illumination array is producing said field of illumination within said FOV and said area-type image detection array is detecting a 2D digital image frame of said detected object within said FOV, during object illumination and imaging operations.

21. The digital image capture and processing system of claim 13, wherein said illumination array comprises an LED illumination array haying a plurality of LEDs.

22. The digital image capture and processing system of claim 13, wherein said housing is capable of being supported within the hand of an operator.

23. The digital image capture and processing system of claim 13, wherein said housing is capable of being supported on said countertop surface.

24. The digital image capture and processing system of claim 13, wherein said 1D and/or 2D code symbols are selected from the group of 1D and/or 2D bar code symbols, PDF symbols and data matrix symbols.