Systems and methods for concurrent image capture and decoding of graphical codes

• US 7,519,239 B2
• Filed: 02/11/2004
• Issued: 04/14/2009
• Est. Priority Date: 02/11/2004
• Status: Active Grant

• Current Assignee: The Code Corporation (Brady Corporation)
• Original Assignee: The Code Corporation (Brady Corporation)
• Inventors: Hepworth, Paul, Powell, George
• Primary Examiner(s): Strege; John B
• Application Number:
  US10/776,449
• Publication Number:
  US 20050173534A1
• Time in Patent Office: 1,889 Days
• Field of Search: 382/318, 382/143, 382/307, 235/454, 718/102, 718/101
• US Class Current: 382/318
• CPC Class Codes: G06K 7/1093 sensing, after transfer of the image of the data-field to an intermediate store, e.g. storage with cathode ray tube

Abstract

Systems and methods for concurrent image capture and decoding of graphical codes are disclosed. In an exemplary method disclosed herein, a first image is captured by an image capture component in a graphical code reader. The first image is processed by a decoding component. Processing the first image involves searching for a graphical code within the first image and attempting to decode the graphical code. A second image is then captured by the image capture component while the first image is being processed by the decoding component.

Claims

1. In a graphical code reader, a method for concurrent image capture and decoding, comprising:

using a graphical code reader to carry out the steps of;

capturing a first image;

processing the first image by searching for a graphical code within the first image and attempting to decode the graphical code;

capturing a second image while the first image is being processed;

determining an estimated processing time p for processing at least some of the first image; and

determining an estimated capture time c for capturing the second image;

wherein the capturing of the second image starts p−

c time units after the processing of the first image starts.

2. The method of claim 1, wherein the estimated processing time p is an estimate of an amount of time required to process the entire first image.

3. The method of claim 1, wherein the estimated processing time p is an estimate of an amount of time required to process a portion of the first image.

4. The method of claim 3, wherein the estimated processing time p is a function of at least one of the quality of the first image, the number of symbols in the graphical code, and the complexity of the symbols in the graphical code.

5. The method of claim 1, further comprising stopping the processing of the first image p time units after the processing of the first image starts.

6. A graphical code reader that is configured for concurrent image capture and decoding, comprising:

a decoding component configured to process a first image by searching for a graphical code within the first image and attempting to decode the graphical code;

an image capture component configured to capture the first image and to capture a second image while the first image is being processed by the decoding component;

a pool of image buffers for temporarily storing the first image and the second image; and

an estimation component configured to determine an estimated processing time p for processing at least some of the first image and an estimated capture time c for capturing the second image;

wherein the image capture component staffs capturing the second image p−

c time units after the decoding component starts processing the first image.

7. The graphical code reader of claim 6, wherein the estimated processing time p is an estimate of an amount of time required to process the entire first image.

8. The graphical code reader of claim 6, wherein the estimated processing time p is an estimate of an amount of time required to process a portion of the first image.

9. The graphical code reader of claim 8, wherein the estimated processing time p is a function of at least one of the quality of the first image, the number of symbols in the graphical code, and the complexity of the symbols in the graphical code.

10. The graphical code reader of claim 6, wherein the decoding component stops processing the first image p time units after the decoding component starts processing the first image.