A modified cosine transform

Kwok Tung Lo; Wai Kuen Cham

doi:10.1006/jvci.1993.1016

A modified cosine transform

Research output: Journal article publication › Journal article › Academic research › peer-review

Abstract

In this work, we propose to improve the performance of the DCT by weighting the DCT matrices with some simple structured orthonormal matrices. The new transform thus generated is called the weighted cosine transform (WCT). This method of modification ensures that fast computational algorithms exist for the WCT. Tests using both a statistical model and real images have shown that the WCT performs better than the DCT. The implementation of an order-N WCT is similar to that of the DCT. The additional computation overhead is 1.5N multiplications and N additions.

Original language	English
Pages (from-to)	178-186
Number of pages	9
Journal	Journal of Visual Communication and Image Representation
Volume	4
Issue number	2
DOIs	https://doi.org/10.1006/jvci.1993.1016
Publication status	Published - 1 Jan 1993
Externally published	Yes

ASJC Scopus subject areas

Signal Processing
Media Technology
Computer Vision and Pattern Recognition
Electrical and Electronic Engineering

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10.1006/jvci.1993.1016

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A modified cosine transform

Abstract

ASJC Scopus subject areas

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