DocumentCode
1252945
Title
Determination of frequency sensitivities for perceptual subband image coding
Author
Fong, W.C. ; Chan, S.C. ; Ho, K.L.
Author_Institution
Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong
Volume
33
Issue
7
fYear
1997
fDate
3/27/1997 12:00:00 AM
Firstpage
581
Lastpage
582
Abstract
A method for determining the visibility thresholds for a given subband system is introduced. The approach identifies the important worse case combination of the quantisation error in each basis function and determines the corresponding visibility thresholds using results previously measured in the DCT domain. Using the proposed method it is relatively simple to determine the visibility thresholds for any subband system in any colour space. Simulation results on the lapped orthogonal transform (LOT) show that the visibility thresholds are useful in visually lossless coding and perceptual weighted quantisation
Keywords
image coding; quantisation (signal); transforms; colour space; frequency sensitivities; lapped orthogonal transform; perceptual subband image coding; perceptual weighted quantisation; quantisation error; visibility thresholds; visually lossless coding; worse case combination;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19970406
Filename
591374
Link To Document