Image analysis – Image transformation or preprocessing – Changing the image coordinates
Patent
1997-03-24
1999-01-19
Au, Amelia
Image analysis
Image transformation or preprocessing
Changing the image coordinates
245127, 348458, G06K 932
Patent
active
058622683
ABSTRACT:
A bilinear decimator converts an input data sequence representing a high resolution image formed by N horizontal pixel lines to an output data sequence representing a lower resolution image formed by P horizontal pixel lines where N>P. The decimation ratio P/N can be any rational fraction. When the decimation ratio reduces to the form 1-(1
), the decimator computes the each output sequence data value as a simple weighted average of pixel data values for two vertically adjacent high resolution image pixels. When the decimation ratio is other than of the form 1-(1
), the decimator adds additional terms to the computation of output pixel data values when necessary to compensate for aliasing errors.
REFERENCES:
patent: 4204227 (1980-05-01), Gurley
patent: 4677483 (1987-06-01), Dischert et al.
patent: 5019904 (1991-05-01), Campell
patent: 5253041 (1993-10-01), Wine et al.
patent: 5268751 (1993-12-01), Geiger et al.
patent: 5469222 (1995-11-01), Spragne
Ahmed Samir A
Au Amelia
FOCUS Enhancements, Inc.
Ricci Christopher P.
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