Method and apparatus for storage and retrieval of handwritten information
US5524240A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1994 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Oct 17, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99945
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method is provided for generating an indexed database stored in a computer system. A database is established. The database includes a plurality of data objects. Each data object is defined by a respective tuple of attributes. The attributes include at least one attribute having a domain of values that includes handwritten objects. Each handwritten object includes a plurality of symbols ordered in an output sequence. An index is established, having a root node and a plurality of leaf nodes. Each leaf node is connected to the root node by a respective path, such that each path from the root node to one of the plurality of leaf nodes corresponds to a respective input sequence of symbols. The input sequence for the respective leaf node includes a set of pointers to a subset of the tuples. A respective Hidden Markov Model (HMM) is executed to analyze the output sequence of each handwritten object and to determine a respective probability that each input sequence matches the output sequence. A pointer to any tuple for which the respective output sequence has at least a threshold probability of matching the input sequence (corresponding to the leaf node) is included in the respective se…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.