Visually interactive decoding of dataforms

• US 5,659,167 A
• Filed: 12/06/1995
• Issued: 08/19/1997
• Est. Priority Date: 04/05/1994
• Status: Expired due to Fees

• Current Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Original Assignee: Metanetics Corporation
• Inventors: Wang, Ynjiun P., Meyerson, Robert F.
• Primary Examiner(s): Hajec, Donald T.
• Assistant Examiner(s): TREMBLAY, MARK STEPHEN
• Application Number:
  US08/567,902
• Time in Patent Office: 622 Days
• Field of Search: 235/462, 235/472
• US Class Current: 235/472.01
• CPC Class Codes: G06K 7/1095 the scanner comprising adaptations for scanning a record carrier that is displayed on a display-screen or the like
• CPC Class Codes: G06K 7/14 using light without selection of wavelength, e.g. sensing reflected white light G06K7/10831 - G06K7/1097 take precedence

Abstract

Interactive decoding of machine readable dataforms provides improved control of decoding avoiding inaccurate reading of dataforms. While data is entered (12) and encoded (14) an image of the resulting dataform, such as a data code matrix or two-dimensional bar code, is displayed (16) and continuously updated as the dataform (20) fills with entered data. Using the display (16) and an input unit (12) such as a keyboard, digitizer or scanner, data can be edited to add, modify or delete data while observing the resulting dataform (20). On completion, the final dataform code signals are provided for further use (24) or a copy of the dataform (20) is provided by printing, for example. During decoding, an image of the dataform (20) as captured by a reader (32), such as a laser scanner, CCD matrix or CMOS camera, is displayed (34). Observing the display (34), the operator can determine if the image is too small, out of focus, partially out of view, etc., and take action (33) to improve the reader (32) performance. The dataform (20) is then decoded (36) with improved accuracy and data signals are displayed or printed out (40) or provided for further use (38). Automated image monitoring and reader adjustment is also described. Methods and systems for interactive decoding of dataforms are described.

Claims

1. A visually interactive method for decoding a machine readable dataform, comprising the steps of:

(p) utilizing a reader to read at least a portion of a dataform fixed in a machine readable copy, to provide electrical signals representative of at least said portion of said dataform;

(q) viewing a dynamic display providing visual guide marks viewable with a visual image of at least said portion of said dataform, in response to said electrical signals;

(r) utilizing said visual guide marks to visually determine whether said visual image of said dataform has at least a predetermined minimum size and is centered within said dynamic display, and implementing one of the following (i) changing the reading relationship between said reader and said dataform and (ii) activation of decoding via step (t);

(s) in response to a change in said reading relationship, repeating steps (p), (q) and (r); and

(t) in response to activation of decoding, decoding said step (p) electrical signals to provide data output signals representative of entry data encoded in said dataform.

2. A method for decoding as in claim 1, additionally comprising the step of presenting a visual representation of said data encoded in said dataform responsively to said data output signals.

3. A method for decoding as in claim 1, additionally comprising the step of presenting a visual representation of said data encoded in said dataform responsively to said data output signals and wherein said visual representation of said data is provided for viewing with said step (q) visual image.

4. A method for decoding as in claim 1, wherein step (r) additionally includes selecting a decoding protocol based on visual identification of the type of dataform viewed in said visual image.

5. A method for decoding as in claim 1, wherein step (p) comprises utilizing a scanner to read at least a portion of one of the following:

a matrix code, a bar code.

6. A method for decoding as in claim 1, wherein changing said reading relationship between said reader and said dataform in said step (r) includes changing one or more of the following:

alignment, lateral positioning, distance, focus, magnification, reading duration, exposure time, orientation, scanning speed, resolution.

7. A method for decoding a machine readable dataform, comprising the steps of:

(p) utilizing a reader to read a dataform fixed in a machine readable copy, to provide electrical signals representative of said dataform;

(q) viewing a dynamic display providing visual guide marks viewable with a visual image of said dataform in response to said electrical signals;

(r) utilizing said visual guide marks to visually determine whether said visual image of said dataform has at least a predetermined minimum size and is centered within said dynamic display, and implementing one of the following (i) changing the reading relationship between said reader and said dataform and (ii) leaving said reading relationship unchanged, if acceptable;

(s) in response to a change in said reading relationship repeating steps (p), (q) and (r); and

(t) automatically decoding said step (p) electrical signals when said reading relationship is acceptable, to provide data output signals representative of data encoded in said dataform.

8. A method for decoding as in claim 7, wherein changing said reading relationship between said reader and said dataform in said step (r) includes changing one or more of the following:

alignment, lateral positioning, distance, focus, magnification, reading duration, exposure time, orientation, scanning speed, resolution.

9. A method for decoding as in claim 7, wherein step (r) additionally comprises visually determining the type of dataform viewable in said visual image and selecting a decoding protocol suitable for that type of dataform.