Quadtrees, transforms and image coding

Martin, Ralph Robert and Anguh, M. M. 1991. Quadtrees, transforms and image coding. Computer Graphics Forum 10 , pp. 91-96.

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Abstract

Transforms and quadtrees are both methods of representing information in an image in terms of the presence of information at differing length scales. This paper presents a mathematical relationship between these two approaches to describing images in the particular case when Walsh transforms are used. Furthermore, both methods have been used for the compression of images for transmission. This paper notes that under certain circumstances, quadtree compression produces identical results to Walsh transform coding, but requires less computational effort to do so. Remarks are also made about the differences between these approaches.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Computer Science & Informatics
Subjects:	Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Publisher:	Wiley-Blackwell
ISSN:	0167-7055
Date of First Compliant Deposit:	30 March 2016
Date of Acceptance:	April 1991
Last Modified:	14 Nov 2024 21:30
URI:	https://orca.cardiff.ac.uk/id/eprint/63662

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