Method and apparatus for filtering digital data by concatenating preprocessed overlapping groups of the data
US5101445A · kind A · utility
9Cited by
3References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 16, 1989 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Mar 16, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image, of the type that is comprised of an array of pixels, is filtered by the steps of: (a) reading a respective group of pixels from the array for each individual pixel that is in the array, with each pixel group overlapping other pixel groups and consisting of pixels that are contiguous with the individual pixel; (b) quantizing each of the respective groups of pixels; (c) retrieving from a memory, a single pixel for each quantized group of pixels, with the single pixel being the result of a pre-performed transformation on the quantized group of pixels; and (d) concatenating the retrieved pixels to form the filter image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.