Image coding using weighted cosine transform

Kwok Tung Lo, Wai kuen Cham

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


A new orthogonal transform, called weighted cosine transform (WCT), is developed for digital image coding applications. The new transform is characterized. The transform matrix is the weighted version of that in the discrete cosine transform (DCT). Various commonly used criteria based on the one-dimensional and two-dimensional Markov models have shown that the performance of the order-8 and order-16 WCT is better than the DCT and the phase-shift cosine transform (PSCT), which is an improved version of the DCT. A fast computational algorithm for the WCT is also derived, which, however, requires more computational efforts than the DCT.
Original languageEnglish
Title of host publication90 IEEE Reg 10 Conf Comput Commun Syst IEEE TENCON 90
PublisherPubl by IEEE
Number of pages5
ISBN (Print)0879425563
Publication statusPublished - 1 Dec 1990
Externally publishedYes
Event1990 IEEE Region 10 Conference on Computer and Communication Systems - IEEE TENCON '90 - , Hong Kong
Duration: 24 Sept 199027 Sept 1990


Conference1990 IEEE Region 10 Conference on Computer and Communication Systems - IEEE TENCON '90
Country/TerritoryHong Kong

ASJC Scopus subject areas

  • General Engineering


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