Method and apparatus for forming 3.times.3 pixel arrays and for performing programmable pattern contingent modifications of those arrays
US4648119A · kind A · utility
28Cited by
7References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 18, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Mar 18, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for defining a bank of sequential windows from a raster-scanned image of a document for storage in a data base. In addition, the apparatus includes a look-up table for each window wherein the bit pattern of the window is used to determine the correction factor which is applied to the next window as the "new" bit from a set of patterns and correction factors derived from well known algorithms developed to minimize the amount of data needed to electronically recreate a given document. The apparatus also includes storage devices to permit the application of the algorithm in overlapping pieces over the face of the document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.