Digital Images: Redundancy

Authored by: Mark S. Schmalz

Encyclopedia of Optical and Photonic Engineering

Print publication date:  September  2015
Online publication date:  September  2015

Print ISBN: 9781439850978
eBook ISBN: 9781351247184
Adobe ISBN:

10.1081/E-EOE2-120009635

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Abstract

Of crucial importance to the success of image compression is the concept of redundancy, which denotes the predictability of spatial, statistical, or motion parameters derived from images or sequences of images. This entry begins with a definition of natural imagery and remarks concerning the occurrence of common redundant patterns in nature. Redundancy at the level of pixel values is discussed, and the types and examples of spatial patterns in natural and man-made objects that facilitate compression are considered. Also, an overview of redundancy in transformed pixel values is provided, and analytical and empirical measures of redundancy and their computation are discussed.

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