Visibility thresholds for quantization distortion in JPEG2000

Author

Oh, Han ; Bilgin, Ali ; Marcellin, Michael W.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Arizona, Tucson, AZ, USA

fYear

2009

fDate

29-31 July 2009

Firstpage

228

Lastpage

232

Abstract

Visibility thresholds play an important role in finding appropriate quantization step sizes in image and video compression systems. In this paper we present a new method of measuring visibility thresholds for quantization distortion in JPEG2000. A quantization distortion model for each subband is developed based on the statistical characteristics of wavelet coefficients and the dead-zone quantizer of JPEG2000. Thresholds obtained from these quantization distortion models are image-adaptive and ensure visually lossless coding with low computational burden.

Keywords

data compression; distortion; quantisation (signal); statistical analysis; video coding; visibility; wavelet transforms; JPEG2000; dead-zone quantizer; image compression system; image-adaptive model; quantization distortion model; statistical characteristics; video compression system; visibility threshold; visually lossless coding; wavelet coefficients; Discrete cosine transforms; Discrete wavelet transforms; Distortion measurement; Frequency; Humans; Image coding; Quantization; Transform coding; Video compression; Wavelet coefficients; contrast sensitivity function; human visual system; visibility threshold; visually lossless coding;

fLanguage

English

Publisher

ieee

Conference_Titel

Quality of Multimedia Experience, 2009. QoMEx 2009. International Workshop on

Conference_Location

San Diego, CA

Print_ISBN

978-1-4244-4370-3

Electronic_ISBN

978-1-4244-4370-3

Type

conf

DOI

10.1109/QOMEX.2009.5246948

Filename

5246948