ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
21.54
Conference information
An Application of DPCM Coding to Data Compression of Digital Image with Gray Levels Using Bilinear Surface Patches
Makoto HASEGAWAIssei YAMASAKI
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Pages 1-6

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Abstract

This article describes an application of differential prediction coding to data compression of digital image with gray levels using bilinear surface patches. The region on which a image is defined is subdevided into nonuniform blocks, and the luminance values in a block are approximated by bilinear surface patch constracted by the luminance values at the four corners of the block. We propose four methods to predict luminance value at the block's corner. Our coding method provides higher quality at low bitrate than JPEG method.

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© 1997 The Institute of Image Information and Television Engineers
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