HANDHELD SCANNER FOR CODED SURFACES

• US 20090032600A1
• Filed: 07/24/2008
• Published: 02/05/2009
• Est. Priority Date: 08/01/2007
• Status: Active Grant

• Current Assignee: Silverbrook Research Pty Limited
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Silverbrook, Kia, Lapstun, Paul
• Granted Patent: US 7,997,490 B2
• Time in Patent Office: Days
• US Class Current: 235/472.20
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: H01L 27/14623 Optical shielding
• CPC Class Codes: H01L 27/14678 Contact-type imagers

Abstract

A swipe scanner for scanning a graphic image printed on a surface. The surface has a position-coding pattern imposed with the graphic image. The swipe scanner comprises: (a) a first image sensor positioned for imaging portions of the surface during a swipe of the surface, each imaged portion containing part of the position-coding pattern; (b) a second image sensor for capturing, during the swipe, portions of the graphic image; and (c) a processor. The processor is configured for: determining absolute positions of the swipe scanner using the parts of the position-coding pattern; and (d) using the absolute positions to assemble the captured portions of the graphic image into a scanned graphic image.

Claims

1. A swipe scanner for scanning a graphic image printed on a surface, said surface having a position-coding pattern imposed with the graphic image, said swipe scanner comprising:

at least one first image sensor positioned for imaging portions of said surface during a swipe of the surface, each imaged portion containing part of the position-coding pattern;

at least one second image sensor for capturing, during said swipe, portions of the graphic image; and

a processor configured for;

determining absolute positions of the swipe scanner using said parts of the position-coding pattern; and

using the absolute positions to assemble said captured portions of said graphic image into a scanned graphic image.

2. The swipe scanner of claim 1, further comprising a motion sensor for sensing relative motion of the scanner.

3. The swipe scanner of claim 2, wherein said processor is configured to use relative motion data together with said absolute positions to assemble said captured portions into said scanned image.

4. The swipe scanner of claim 2, wherein said motion sensor comprises said first image sensor.

5. The swipe scanner of claim 4, wherein said motion sensor is an optical mouse sensor.

6. The swipe scanner of claim 1, wherein said position-coding pattern further identifies an orientation of position data relative to a grid containing said position data.

7. The swipe scanner of claim 6, wherein said processor is configured to use each part of the position-coding pattern to determine an orientation of the scanner relative to said grid, and to use said orientation together with said absolute position to assemble said captured portions.

8. The swipe scanner of claim 1, wherein said position-coding pattern further identifies an identity, said identity identifying said graphic image, said surface or a region of said surface.

9. The swipe scanner of claim 1, further comprising communication means for communicating with a computer system.

10. The swipe scanner of claim 1, wherein said second image sensor is a linear image sensor.

11. The swipe scanner of claim 10, wherein said second image sensor extends substantially a width of said scanner.

12. A handheld device comprising the swipe printer according to claim 1.

13. The handheld device of claim 12, which is selected from the group comprising:

a mobile phone and a personal digital assistant.