Invention Grant
- Patent Title: Robust indexing and retrieval of electronic ink
- Patent Title (中): 电子墨水的稳健索引和检索
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Application No.: US11397436Application Date: 2006-04-04
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Publication No.: US07646940B2Publication Date: 2010-01-12
- Inventor: Kumar H. Chellapilla , John C. Platt
- Applicant: Kumar H. Chellapilla , John C. Platt
- Applicant Address: US WA Redmond
- Assignee: Microsoft Corporation
- Current Assignee: Microsoft Corporation
- Current Assignee Address: US WA Redmond
- Agency: Lee & Hayes, PLLC
- Main IPC: G06K9/60
- IPC: G06K9/60

Abstract:
A unique system and method that facilitates indexing and retrieving electronic ink objects with improved efficiency and accuracy is provided. Handwritten words or characters are mapped to a low dimension through a process of segmentation, stroke classification using a neural network, and projection along directions found using OPCA, for example. The employment of OPCA makes these low dimensional representations robust to handwriting variations or noise. Each handwritten word or set of characters is stored along with neighborhood hyperrectangle that represents word variations. Redundant bit vectors are used to index the hyperrectangles for efficient storage and retrieval. Ink-based queries can be submitted in order to retrieve at least one ink object. To do so, the ink query is processed to determine its query point which is represented by a (query) hyperrectangle. A data store can be searched for any hyperrectangles that match the query hyperrectangle.
Public/Granted literature
- US20070230791A1 Robust indexing and retrieval of electronic ink Public/Granted day:2007-10-04
Information query