Loop-up table image scaling for rational factors
US5410616A · kind A · utility
16Cited by
17References
12Claims
0Family size
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Key dates
| Filing date | Feb 25, 1994 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Feb 25, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/4007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for scaling image pixel data by a rational scale factor of L/M utilizes look-up tables for input pixel addressing and convolution of up to two adjacent input pixels which offers an improved implementation of a conventional sampling rate conversion system wherein the input pixels are upsampled by a factor of L by inserting L-1 zeroes, interpolating the zero upsamples by finite impulse response techniques and down-sampling the interpolated data by a factor of M.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.