Initial point establishment using an image of a portion of an object

• US 9,594,939 B2
• Filed: 09/09/2013
• Issued: 03/14/2017
• Est. Priority Date: 09/09/2013
• Status: Active Grant

• Current Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Original Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Inventors: Zumsteg, Philip
• Primary Examiner(s): Lee, Michael G
• Assistant Examiner(s): ELLIS, SUEZU Y
• Application Number:
  US14/021,637
• Publication Number:
  US 20150069122A1
• Time in Patent Office: 1,282 Days
• US Class Current: 1/1
• CPC Class Codes: G01B 11/02 for measuring length, width or thickness G01B11/08 takes precedence
• CPC Class Codes: G06K 19/06028 using bar codes
• CPC Class Codes: G06K 19/07758 arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
• CPC Class Codes: G06K 7/10128 the step consisting of detection of the presence of one or more record carriers in the vicinity of the interrogation device
• CPC Class Codes: G06K 7/10762 Relative movement
• CPC Class Codes: G06K 7/10861 sensing of data fields affixed to objects or articles, e.g. coded labels postal sorting B07C3/14, conveying articles B65G47/48
• CPC Class Codes: G06K 7/10881 constructional details of hand-held scanners
• CPC Class Codes: G06K 7/1413 1D bar codes
• CPC Class Codes: G06K 7/1443 locating of the code in an image
• CPC Class Codes: G06K 7/1452 detecting bar code edges
• CPC Class Codes: G06K 7/1473 error correction
• CPC Class Codes: G06Q 10/00 Administration; Management
• CPC Class Codes: G06Q 10/063114 Status monitoring or status determination for a person or group
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: H04N 1/00 Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof

Abstract

A system and method of determining an initial point for a scan path may include acquiring, using a mobile device, an image of an object, the image comprising decodable indicia. Using the mobile device, data is decoded from the decodable indicia. Indicia dimensions of the decodable indicia are determined based on the data, and image dimensions of the decodable indicia in the image are determined. An initial location of the mobile device is calculated relative to the decodable indicia based on a geometric relationship between the indicia dimensions of the decodable indicia and the image dimensions of the decodable indicia in the image.

Claims

1. A method of determining an initial point for a scan path, the method comprising:

acquiring, using a mobile device, an image of an object, the image comprising decodable indicia;

decoding, using the mobile device, data from the decodable indicia;

determining indicia dimensions of the decodable indicia based on the data comprising scanning the decodable indicia to obtain data indicating the indicia dimensions of the decodable indicia;

determining image dimensions of the decodable indicia in the image comprising detecting one or more edges of the object within the image; and

calculating an initial location of the mobile device relative to the decodable indicia based on a geometric relationship between the indicia dimensions of the decodable indicia and the image dimensions of the decodable indicia in the image.

2. The method according to claim 1, wherein the initial location comprises coordinates of a location indicating a beginning reading point of the mobile device.

3. The method according to claim 1, wherein the calculating an initial location of the mobile device comprises:

determining an x distance of the mobile device from an origin using decodable indicia dimension data decoded from the decodable indicia; and

determining a y distance of the mobile device from the origin.

4. The method according to claim 1, further comprising determining an orientation of the mobile device.

5. The method according to claim 1, further comprising determining an orientation of the mobile device based on an orientation of one of the decodable indicia in the image or the object in the image.

6. The method according to claim 1, further comprising analyzing the image for errors and correcting the errors.

7. The method according to claim 6, wherein the analyzing comprises checking for errors of the image, correcting the errors using correction factors, and storing the correction factors, wherein the errors comprise at least one of keystone effect errors of the image, rotation errors of the image, or perspective errors of the image.

8. The method according to claim 1,

wherein the geometric relationship comprises a ratio of the indicia dimensions to the image dimensions, and

wherein the calculating an initial location of the mobile device relative to the decodable indicia based on a geometric relationship comprises multiplying a base distance by the ratio to determine a distance of the mobile device from the decodable indicia.

9. The method according to claim 1, wherein the object comprises one of a shelving unit, a clothing rack, or a table.

10. The method according to claim 1, wherein the decodable indicia comprises one of a bar code or a radio frequency identification (RFID) tag.

11. The method according to claim 1, wherein the determining image dimensions of the decodable indicia in the image comprises measuring a number of pixels in the image comprising the decodable indicia to calculate a physical relationship between a location of the mobile device and the decodable indicia based on the indicia dimensions of the decodable indicia.

12. A method of determining an initial point for a scan path, the method comprising:

acquiring, using a mobile device, an image of an object, the image comprising decodable indicia;

decoding, using the mobile device, data from the decodable indicia;

determining indicia dimensions of the decodable indicia based on the data;

determining image dimensions of the decodable indicia in the image; and

calculating an initial location of the mobile device relative to the decodable indicia based on a geometric relationship between the indicia dimensions of the decodable indicia and the image dimensions of the decodable indicia in the image, wherein the geometric relationship comprises a ratio of the indicia dimensions to the image dimensions, and

wherein the calculating an initial location of the mobile device relative to the decodable indicia based on a geometric relationship comprises multiplying a base distance by the ratio to determine a distance of the mobile device from the decodable indicia.

13. The method according to claim 12, wherein

the initial location comprises coordinates of a location indicating a beginning reading point of the mobile device.

14. The method according to claim 12, wherein

the calculating an initial location of the mobile device comprises:

determining an x distance of the mobile device from an origin using decodable indicia dimension data decoded from the decodable indicia; and

determining a y distance of the mobile device from the origin.

15. The method according to claim 12, further comprising analyzing the image for errors and correcting the errors by checking for errors of the image, correcting the errors using correction factors, and storing the correction factors, wherein the errors comprise at least one of keystone effect errors of the image, rotation errors of the image, or perspective errors of the image.

16. The method according to claim 12, wherein the decodable indicia comprises one of a bar code or a radio frequency identification (RFID) tag, and wherein the object comprises one of a shelving unit, a clothing rack, or a table.

17. The method according to claim 12, wherein the determining image dimensions of the decodable indicia in the image comprises measuring a number of pixels in the image comprising the decodable indicia to calculate a physical relationship between a location of the mobile device and the decodable indicia based on the indicia dimensions of the decodable indicia.

18. The method according to claim 12, wherein the determining indicia dimensions comprises scanning the decodable indicia to obtain data indicating the indicia dimensions of the decodable indicia.

19. The method according to claim 12 wherein the determining image dimensions comprises detecting one or more edges of the object within the image.

20. A method of determining an initial point for a scan path, the method comprising:

acquiring, using a mobile device, an image of an object, the image comprising decodable indicia;

decoding, using the mobile device, data from the decodable indicia;

determining indicia dimensions of the decodable indicia based on the data;

determining image dimensions of the decodable indicia in the image; and

calculating an initial location of the mobile device relative to the decodable indicia based on a geometric relationship between the indicia dimensions of the decodable indicia and the image dimensions of the decodable indicia in the image by;

determining an x distance of the mobile device from an origin using decodable indicia dimension data decoded from the decodable indicia; and

determining a y distance of the mobile device from the origin.