Image analysis – Image transformation or preprocessing – Changing the image coordinates
Patent
1995-04-26
1999-02-16
Boudreau, Leo H.
Image analysis
Image transformation or preprocessing
Changing the image coordinates
382235, G06T 340
Patent
active
058728740
ABSTRACT:
An efficient method and apparatus that operates directly upon compressed blocks of image data to transform them into compressed blocks of scaled image data. Decompression of the compressed blocks of scaled image data yields blocks of scaled image data, which are then used to display a scaled down version of an original image. The present invention is more computationally efficient than a previously known scaling method, which required that compressed blocks of image data be uncompressed prior to any scaling operations.
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Boudreau Leo H.
Hewlett--Packard Company
Werner Brian P.
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