DCT coefficient statistics in images corrupted by spatially correlated noise

Author

Roenko, Alexey ; Lukin, Vladimir ; Djurovic, Igor

Author_Institution

Dept. of Signal Reception, Transm. & Process., Nat. Aerosp. Univ., Kharkov, Ukraine

fYear

2013

fDate

15-20 June 2013

Firstpage

156

Lastpage

159

Abstract

The analysis task of image discrete cosine transform (DCT) coefficients in case of spatially correlated noise is considered. Several estimators of shape parameter of generalized Gaussian distribution based on the forth central moment as well as percentile coefficient of kurtosis are applied in the research. It is shown that spatially correlated type of noise considerably influences statistics of DCT coefficients both in each particular image block and for a given spatial frequency for all image blocks. Histogram analysis of shape parameter estimates shows that noise type can be distinguished based on the mode position and its value.

Keywords

Gaussian distribution; correlation methods; discrete cosine transforms; image denoising; parameter estimation; statistics; DCT coefficient statistics; forth central moment; generalized Gaussian distribution; histogram analysis; image block; image discrete cosine transform coefficient analysis task; kurtosis percentile coefficient; shape parameter estimators; spatial frequency; spatially correlated noise corrupted images; Discrete cosine transforms; Educational institutions; DCT coefficient statistics; noisy image; tail heaviness;

fLanguage

English

Publisher

ieee

Conference_Titel

Embedded Computing (MECO), 2013 2nd Mediterranean Conference on

Conference_Location

Budva

ISSN

1800-993X

Type

conf

DOI

10.1109/MECO.2013.6601344

Filename

6601344