Determination of the visibility thresholds for 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

2

fYear

1997

fDate

9-12 Jun 1997

Firstpage

1121

Abstract

In this paper, a method to determine the visibility thresholds for a given subband system is introduced. Our approach identifies the important worse case combination of the quantization error in each basis function and determine 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 the YCrCb domain. Simulation results on the Lapped Orthogonal Transform (LOT) show that the visibility thresholds are useful in visually lossless coding and perceptual weighted quantization

Keywords

discrete cosine transforms; image coding; quantisation (signal); visibility; DCT domain; YCrCb domain; basis function; lapped orthogonal transform; perceptual weighted quantization; quantization error; subband image coding; visibility thresholds; visually lossless coding; Codecs; Colored noise; Discrete cosine transforms; Frequency; Humans; Image coding; Noise shaping; Psychology; Quantization; Visual system;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on

Print_ISBN

0-7803-3583-X

Type

conf

DOI

10.1109/ISCAS.1997.621958

Filename

621958