Spatial transforms from displayed codes

• US 20060204101A1
• Filed: 03/01/2005
• Published: 09/14/2006
• Est. Priority Date: 03/01/2005
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Dang, Yingnong, Wang, Jian, Lin, Zhouchen, Xu, Yihua, Chen, Liyon
• Granted Patent: US 7,477,784 B2
• Time in Patent Office: Days
• US Class Current: 382/188
• CPC Class Codes: G06V 30/1423 the instrument generating sequences of position coordinates corresponding to handwriting preprocessing or recognising digital ink G06V30/32

Abstract

A method and apparatus for performing EIC pattern analysis is described. Pattern feature extraction is performed followed by EIC symbol segmentation. A system may later use the result from the pattern analysis to determine a location of a captured image in relation to a larger array of EIC symbols.

Claims

1. A process for processing an image containing codes comprising the steps of:

extracting features from the image; and

segmenting said features to create a homography matrix.

2. The process according to claim 1, said extracting features step includes determining the rotation of said image.

3. The process according to claim 1, said extracting features step includes determining the scale of said image.

4. The process according to claim 1, said extracting features step includes determining the translation of said image.

5. The process according to claim 1, wherein said codes are EIC codes.

6. The process according to claim 1, wherein said codes are EIC codes arranged in EIC symbols.

7. A system for processing an image comprising:

an input receiving an image from a camera;

a processor that processes said image, said processor extracting features from said image and segmenting said features;

an output receiving an output from said processor, said output including a homography matrix.