Patent Document ID: 7646940
Application ID: 11397436

Base Claim:
1. A system that facilitates indexing and retrieving electronic handwritten ink characters comprising: an ink processing module to: featurize input ink to yield a membership matrix for each input ink, project at least the membership matrix for each input ink into a low dimensional space, and determine a projected query point for the query ink, wherein the query point is represented as a query hyperrectangle; and a retrieval module to: search a data store for hyperrectangles that intersect the query point to produce query results, and widen the query results by adding one or more neighboring intervals in each dimension and increasing a number of ON bits in a binary representation of the query hyperrectangle.

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Claim 5:
5. The system of claim 1 , wherein the ink processing module projects the membership matrix for each input ink into the low dimensional space in a plurality of projection directions defined by at least one of the following: oriented principal component analysis (OPCA) and multiple discriminant analysis (MDA).