Sensing device for coded data

• US 7,605,940 B2
• Filed: 04/02/2004
• Issued: 10/20/2009
• Est. Priority Date: 09/17/1999
• Status: Expired due to Fees

• Current Assignee: Silverbrook Research Pty Limited
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Silverbrook, Kia, Moini, Alireza, Yourlo, Zhenya Alexander, Lapstun, Paul, Rusman, Jan, Underwood, Matthew John, Ridley, Nicholas Damon, Henderson, Peter Charles Boyd
• Primary Examiner(s): Grant, II; Jerome
• Application Number:
  US10/815,636
• Publication Number:
  US 20040190085A1
• Time in Patent Office: 2,027 Days
• Field of Search: 358/505, 358/513, 358/474, 358/479, 358/483, 358/497, 358/1.17, 348/294, 348/295, 348/317
• US Class Current: 358/1.17
• CPC Class Codes: G06F 3/0321 by optically sensing the absolute position with respect to a regularly patterned surface forming a passive digitiser, e.g. pen optically detecting position indicative tags printed on a paper sheet constructional details of pen-shaped pointing devices G06F3/03545, G06F3/03542, G06F3/037
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: H04N 1/00244 with a server, e.g. an internet server fax-servers or the like for store and forward H04N1/324
• CPC Class Codes: H04N 1/00326 with a data reading, recognizing or recording apparatus, e.g. with a bar-code apparatus arrangements for the associated working of recording or reproducing apparatus with related apparatus G11B31/00
• CPC Class Codes: H04N 1/00358 Type of the scanned marks
• CPC Class Codes: H04N 1/00376 Means for identifying a mark sheet or area
• CPC Class Codes: H04N 1/00968 by scanning marks on a sheet mark-sheet input means H04N1/00355; sensing record carriers G06K7/00
• CPC Class Codes: H04N 1/107 with manual scanning
• CPC Class Codes: H04N 1/32133 on the same paper sheet, e.g. a facsimile page header
• CPC Class Codes: H04N 1/32778 using a mark-sheet or machine-readable code request
• CPC Class Codes: H04N 2201/3205 of identification information, e.g. name or ID code H04N2201/3209 takes precedence
• CPC Class Codes: H04N 2201/3207 of an address
• CPC Class Codes: H04N 2201/3226 of identification information or the like, e.g. ID code, index, title, part of an image, reduced-size image
• CPC Class Codes: H04N 2201/3242 of processing required or performed, e.g. for reproduction or before recording H04N2201/3256 and subgroups take precedence
• CPC Class Codes: H04N 2201/3243 of type information, e.g. handwritten or text document
• CPC Class Codes: H04N 2201/3247 Data linking a set of images to one another, e.g. sequence, burst or continuous capture mode
• CPC Class Codes: H04N 2201/3249 data relating to a linked page or object, e.g. hyperlink
• CPC Class Codes: H04N 2201/327 which are undetectable to the naked eye, e.g. embedded codes
• CPC Class Codes: H04N 2201/3271 Printing or stamping
• CPC Class Codes: H04N 2201/3278 Transmission

Abstract

The present invention is directed toward a sensing device that reads coded data off of a surface. Interaction data is generated from the read coded data and the interaction data is processed in accordance with the image portion of the image that is extracted from an image sensor.

Claims

1. A sensing device for:

sensing coded data disposed on a surface; and

generating interaction data based on the sensed coded data, the interaction data being indicative of interaction of the sensing device with the surface;

the sensing device comprising;

(a) an image sensor for capturing image information;

(b) at least one analog to digital converter for converting the captured image information into image data;

(c) an image processor for processing the image data to generate processed image data;

(d) a host processor for generating the interaction data based at least partially on the processed image data;

(e) a first framestore for storing frames of the image data; and

(f) a second framestore, the sensing device being configured such that the first and second framestores respectively store alternate frames of the image data associated with alternate frames of image information sensed by the image sensor.

2. A sensing device according to claim 1, wherein the image sensor and the at least one analog to digital converter are integrated on a monolithic integrated circuit.

3. A sensing device according to claim 2, wherein the first framestore is integrated onto the monolithic integrated circuit.

4. A sensing device according to claim 1, wherein the image processor includes subsampling means for subsampling the image data to generate subsampled image data.

5. A sensing device according to claim 4, wherein the image processor is integrated on a monolithic integrated circuit, the monolithic integrated circuit including a first subsampled framestore for storing the subsampled image data based on image data from the first framestore.

6. A sensing device according to claim 4, wherein the image processor includes a low-pass filter for low-pass filtering the image data prior to subsampling it.

7. A sensing device according to claim 4, wherein the image processor includes range expansion means for range expanding the subsampled image data.

8. A sensing device according to claim 6, wherein the image processor includes range expansion means for range expanding the subsampled image data.

9. A sensing device according to claim 1, wherein the first and second framestores are integrated on a monolithic integrated circuit.

10. A sensing device according to claim 1, further including a second subsampled framestore for storing subsampled image data based on image data from the second framestore.

11. A sensing device according to claim 10, wherein the first and second framestores and the first and second subsampled framestores are integrated on a monolithic integrated circuit.