DISTRIBUTION SHAPE OF 2-DIMENSIONAL DCT COEFFICIENTS OF NATURAL IMAGES

被引：145

作者：

MULLER, F

机构：

[1] Institute for Communication Engineering, Aachen University of Technology

来源：

ELECTRONICS LETTERS | 1993年 / 29卷 / 22期

关键词：

DISCRETE COSINE TRANSFORMS; IMAGE CODING; IMAGE PROCESSING;

D O I：

10.1049/el:19931288

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The univariate distribution of DCT coefficients of natural images is investigated. The probability density function (PDF) of the coefficients is modelled with the generalised Gaussian function (GGF) which includes the Gaussian and the Laplacian PDF as special cases. The shape parameter of the GGF is estimated according to the maximum likelihood principle. chi2 tests of fit showed that GGFs model the distribution of DCT coefficients more accurately than Laplacian PDFs.

引用

页码：1935 / 1936

页数：2