Intelligent system for automatically recognizing objects at a point of sale (POS) station by omni-directional imaging of the objects using a complex of coplanar illumination and imaging subsystems

• US 7,651,028 B2
• Filed: 03/29/2007
• Issued: 01/26/2010
• Est. Priority Date: 11/24/2000
• Status: Expired due to Fees

• Current Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Original Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Inventors: Veksland, Mikhail, Ciarlante, Nicola, Knowles, C. Harry, Zhu, Xiaoxun, Xian, Tao, Good, Timothy, Schmidt, Mark, Kotlarsky, Anatoly, Furlong, John, Hernandez, Mark
• Primary Examiner(s): Kim; Ahshik
• Application Number:
  US11/729,525
• Publication Number:
  US 20070262152A1
• Time in Patent Office: 1,034 Days
• Field of Search: 235/462.41, 235/462.42, 235/462.01, 235/462.09, 235/383
• US Class Current: 235/462.41
• CPC Class Codes: G06K 2207/1012 Special detection of object
• CPC Class Codes: G06K 7/10693 for omnidirectional scanning
• CPC Class Codes: G06K 7/10712 Fixed beam scanning
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: G06K 7/10851 Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device basic electronic circuitry H03
• CPC Class Codes: G06Q 20/20 Point-of-sale [POS] network systems
• CPC Class Codes: G06Q 20/202 Interconnection or interaction of plural electronic cash registers [ECR] or to host computer, e.g. network details, transfer of information from host to ECR or from ECR to ECR
• CPC Class Codes: G06Q 20/203 Inventory monitoring
• CPC Class Codes: G06Q 20/208 Input by product or record sensing, e.g. weighing or scanner processing
• CPC Class Codes: G06Q 20/209 Specified transaction journal output feature, e.g. printed receipt or voice output
• CPC Class Codes: G06Q 30/06 Buying, selling or leasing transactions
• CPC Class Codes: G06V 10/141 Control of illumination

Abstract

A digital image capture and processing system for automatically recognizing objects at a point of sale (POS) station. The system comprising a system housing having an imaging window, and containing a digital image capturing and processing engine including a plurality of coplanar illumination and imaging stations. The stations generate and project a complex of coplanar illumination and imaging planes through the imaging window, and within a 3D imaging volume definable relative to the imaging window for omni-directional imaging of objects passing through the 3D imaging volume, and generate digital linear images of the object as the object intersects coplanar illumination and imaging planes within the 3D imaging volume during system operation. A database is provided for storing one or more object libraries representing objects that can be recognized by the system. A digital image processing subsystem automatically (i) processes digital images generated by said coplanar illumination and imaging stations, (ii) extracts object features from processed digital images, and (iii) recognizes objects which are represented by the object libraries and producing information representative of recognized objects for display at the POS station.

Claims

1. A digital image capture and processing system for automatically recognizing objects at a point of sale (POS) station, comprising:

a system housing having an imaging window, and containing a digital image capturing and processing engine including a plurality of coplanar illumination and imaging stations, for generating and projecting a complex of coplanar illumination and imaging planes through said imaging window, and within a 3D imaging volume definable relative to said imaging window for omni-directional imaging of objects passing through said 3D imaging volume, and detecting digital linear images of each said object as said object intersects coplanar illumination and imaging planes within said 3D imaging volume during system operation;

wherein each said coplanar illumination and imaging station includes

(i) an illumination subsystem having a linear illumination array including a plurality of light emitting devices for producing a planar illumination beam (PLIB), and

(ii) an image formation and detection subsystem including a linear image detection array having optics providing a field of view (FOV) on said linear image detection array, and extending substantially along said PLIB so as to form one said coplanar illumination and imaging plane, which is projected through said imaging window and into said 3D imaging volume;

a database for storing one or more object libraries representing objects that can be recognized by said digital image capture and processing system; and

a digital image processing subsystem for automatically (i) processing digital linear images generated by said coplanar illumination and imaging stations, (ii) extracting object features from processed digital linear images, and (iii) recognizing objects which are represented by said object libraries and producing information representative of said recognized objects for display at said POS station.

2. The digital image capture and processing system of claim 1, wherein said objects include vegetables and fruits presented within said 3D imaging volume for recognition.

3. The digital image capturing and processing system of claim 1, which further comprises at least one area-type illumination and imaging station disposed in said system housing, for generating and projecting an area-type illumination and imaging zone through said imaging window, and intersecting with said complex of coplanar illumination and imaging planes within said 3D imaging volume, for supporting said omni-directional digital imaging of objects passing through said 3D imaging volume.

4. The digital image capturing and processing system of claim 1, wherein said plurality of light emitting devices comprises a linear array of incoherent light sources.

5. The digital image capturing and processing system of claim 1, wherein said plurality of light emitting devices comprises a linear array of coherent light sources.

6. The digital image capturing and processing system of claim 1, wherein said linear image detection array comprises an image sensing array selected from the group of a CMOS image sensing array and a CCD image sensing array.

7. The digital image capturing and processing system of claim 1, wherein said image capturing and buffering subsystem captures and buffers series of said linear digital images and composes area-type (2D) digital images of said object graphically representing information in said series of said linear digital images.

8. The digital image capturing and processing system of claim 7, wherein said digital image processing subsystem cooperates with said image capturing and buffering subsystems, for processing said area-type (2D) digital images of said object and recognizing information graphically represented in said area-type digital images.

9. A digital image capturing and processing system for automatically recognizing objects at a point of sale (POS) station, comprising:

a system housing having an imaging window, and containing a digital image capturing and processing engine including a plurality of coplanar illumination and imaging stations, for generating and projecting a complex of coplanar illumination and imaging planes through said imaging window, and within a 3D imaging volume definable relative to said imaging window for omni-directional imaging of objects passing through said 3D imaging volume, and detecting digital linear images of said object as said object intersects coplanar illumination and imaging planes within said 3D imaging volume during system operation;

a database for storing one or more object libraries representing objects that can be recognized by said system; and

a digital image processing subsystem for automatically (i) processing digital images generated by said coplanar illumination and imaging stations, (ii) extracting object features from processed digital images, and (iii) recognizing objects which are represented by said object libraries and producing information representative of said recognized objects for display at said POS station;

wherein each said coplanar illumination and imaging station includes

(i) an illumination subsystem having a linear illumination array including a plurality of light emitting devices for producing a planar illumination beam (PLIB), and

(ii) an image formation and detection subsystem including a linear image detection array having optics providing a field of view (FOV) on said linear image detection array, and extending substantially along said PLIB so as to form one said coplanar illumination and imaging plane (PLIB/FOV) that is projected through said imaging window and into said 3D imaging volume, for capturing linear (1D) digital images of each object moving through said 3D imaging volume, and subsequent processing to read information graphically represented in said linear digital images;

(iii) an automatic illumination control subsystem for controlling the production of illumination by said illumination subsystem into said 3D imaging volume, as each said object is detected moving within said 3D imaging volume; and

(iv) an image capturing and buffering subsystem for capturing and buffering linear digital images from said linear image detection array.

10. The digital image capture and processing system of claim 9, wherein each said coplanar illumination and imaging station further comprises:

a local control subsystem for controlling operations within said coplanar illumination and imaging station.

11. The digital image capturing and processing system of claim 9, wherein said plurality of light emitting devices comprises a linear array of incoherent light sources.

12. The digital image capturing and processing system of claim 11, wherein said linear array of incoherent light sources comprises an array of light emitting diodes (LEDs).

13. The digital image capturing and processing system of claim 9, wherein said plurality of light emitting devices comprises a linear array of coherent light sources.

14. The digital image capturing and processing system of claim 13, wherein said linear array of coherent light sources comprises an array of visible laser diodes (VLDs).

15. The digital image capturing and processing system of claim 9, wherein said linear image detection array comprises an image sensing array selected from the group of a CMOS image sensing array and a CCD image sensing array.

16. The digital image capturing and processing system of claim 9, wherein said image capturing and buffering subsystem captures and buffers a series of said linear digital images and composes one or more area-type (2D) digital images of said object graphically representing information in said series of linear digital images.

17. The digital image capturing and processing system of claim 16, wherein said digital image processing subsystem cooperates with said image capturing and buffering subsystems, for processing said area-type digital images of said object and recognizing information graphically represented in said area-type digital images.

18. The digital image capturing and processing system of claim 17, wherein said processing of said area-type (2D) digital images of said object comprises decode processing of said area-type digital images so as to read one or more code symbols graphically represented in said area-type digital images.

19. The digital image capturing and processing system of claim 18, wherein said one or more code symbols comprise one or more bar code symbols selected from the group consisting of 1D bar code symbols, 2D bar code symbols and data matrix type bar code symbols.

20. The digital image capturing and processing system of claim 9, which further comprises at least one area-type illumination and imaging station disposed in said system housing, for generating and projecting an area-type illumination and imaging zone through said imaging window, and intersecting with said complex of coplanar illumination and imaging planes within said 3D imaging volume, for supporting said omni-directional digital imaging of objects passing through said 3D imaging volume.