Reader for decoding two-dimensional optical information

• US 5,414,251 A
• Filed: 07/28/1994
• Issued: 05/09/1995
• Est. Priority Date: 03/12/1992
• Status: Expired due to Term

• Current Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Original Assignee: Norand Corporation (Baker Hughes Company)
• Inventors: Durbin, Dennis A.
• Primary Examiner(s): Dolinar, Andrew M.
• Assistant Examiner(s): SOLIS, ERICK R
• Application Number:
  US08/284,883
• Time in Patent Office: 285 Days
• Field of Search: 235/456, 235/462, 235/472, 382/59, 358/224
• US Class Current: 235/462.2
• CPC Class Codes: G06K 17/0022 arrangements or provisions for transferring data to distant stations, e.g. from a sensing device "transfer between computer elements G06F13/00 "; data-transmission H04L
• CPC Class Codes: G06K 2007/10524 Hand-held scanners
• CPC Class Codes: G06K 2207/1011 Aiming
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10881 constructional details of hand-held scanners
• CPC Class Codes: G06K 7/1417 2D bar codes

Abstract

A scanner for reading two-dimensional optical information sets is described which includes a housing for supporting a photosensitive array associated with an optical string adapted to focus optical information on the array. Also provided are array and optical string controls for controlling the array and optical string such that the output of selected images on the array are processed via pattern recognition means. Images recognized to contain decodable optical information are displayed and highlighted by a display. In this fashion a user is assisted in aiming, recognizing, confirming the decodability, and decoding images of optical information incident on the array.

Claims

1. An apparatus for reading two-dimensional optical information, comprising:

(a) a housing having an opening;

(b) a photosensitive array mounted within said housing;

(b) optical string means associated with said array and said opening of said housing for focusing optical information on said array;

(c) array and optical string control means for controlling said array and optical string;

(d) memory means for storing output from said array;

(d) pattern recognition means for assisting a user in recognizing and confirming the decodability of optical information;

(e) display means associated with said housing for displaying an image of said array output, as processed by said pattern recognition means, said display means further including optical information decodability indication means;

(f) user feedback means, providing user interface with said apparatus, for facilitating user control over said optical string means, array, and display means;

(g) decoding means for decoding optical information; and

(h) electrical power supply means for providing power for the operation of said apparatus.

2. The apparatus of claim 1, wherein said housing is of a size and shape suited for hand-held operation.

3. The apparatus of claim 1, wherein said photosensitive array is a one-dimensional array.

4. The apparatus of claim 3, wherein said optical string further comprises means for rastering one-dimensional image segments of a two-dimensional image onto the photosensitive regions of said array.

5. The apparatus of claim 1, wherein said photosensitive array is a two-dimensional array.

6. The apparatus of claim 1, further comprising zoom means for changing the image height of an object focused on said array.

7. The apparatus of claim 1, further comprising focusing means for variably focusing the image of an object on said array.

8. The apparatus of claim 1, wherein said memory is volatile.

9. The apparatus of claim 1, wherein said pattern recognition and optical information decoding means includes parallel processor means controlled at least in part by a fuzzy logic instruction set for both aiming and pattern recognition of likely optical information.

10. The apparatus of claim 1, wherein said optical string means further comprises auto focus means.

11. A process for reading two-dimensional optical information, comprising:

(a) directing a scanner at two-dimensional optical information to be read, wherein said scanner includes;

(1) a housing having an opening,

(2) a photosensitive array mounted within said housing,

(3) optical string means associated with said array and said opening of said housing for focusing optical information on said array,

(4) array and optical string control means for controlling said array and optical string,

(5) memory means for storing output from said array,

(6) pattern recognition means for assisting a user in recognizing and confirming the decodability of optical information,

(7) display means associated with said housing for displaying an image of said array output, as processed by said pattern recognition means, said display means further including optical information decodability indication means,

(8) user feedback means, providing user interface with said scanner, for facilitating user control over said optical string means, array, and display means,

(9) decoding means for decoding optical information, and

(10) electrical power supply means for providing power for the operation of said scanner;

(b) activating said pattern recognition means via said user feedback means such that a representation of the image incident upon said array is displayed by said display means;

(c) verifying that the image displayed by said display means is optical information via said decoding means;

(d) adjusting the aim of said scanner such that the display optimally indicates that optical information is both incident on said array as displayed by said display means and decodability indication means;

(e) selecting, via said user feedback means, at least one of the steps of (1) accepting said decoded optical information such that said information is recorded and (2) rejecting the optical information such that the decoded optical information is declined.

12. The process of claim 11, wherein said housing is of a size and shape suited for hand-held operation.

13. The process of claim 11, wherein said photosensitive array is a one-dimensional array.

14. The process of claim 13, wherein said optical string further comprises means for rastering one-dimensional image segments of a two-dimensional image onto the photosensitive regions of said array.

15. The process of claim 11, wherein said photosensitive array is a two-dimensional array.

16. The process of claim 11, further comprising zoom means for changing the image height of an object focused on said array.

17. The process of claim 12, further comprising focusing means for variably focusing the image of an object on said array.

18. The process of claim 11, wherein said memory is volatile.

19. The process of claim 11, wherein said pattern recognition and optical information decoding means includes parallel processor means controlled at least in part by a fuzzy logic instruction set for both aiming and pattern recognition of likely optical information.

20. The process of claim 11, wherein said pattern recognition means is comprised of a neural network.

21. The process of claim 11, wherein said optical string means further comprises auto focus means.