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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN 印刷: 0040-2508
ISSN オンライン: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v67.i15.50
pages 1369-1392

3D DCT Based Filtering of Color and Multichannel Images

N. N. Ponomarenko
National Aerospace University, Kharkiv, Ukraine
A. A. Zelensky
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov; and National Aerospace University (Kharkov Aviation Institute), 17, Chkalov St.., Kharkov, Ukraine
P. T. Koivisto
Department of Mathematics and Statistics, University of Tampere, and Department of Signal Processing, Tampere University of Technology, Tampere, Finland

要約

The performance of vector (3D) filtering of color and multichannel images in discrete cosine transform (DCT) domain is studied. It is shown that the vector filtering offers some advantages compared to the component-wise (2D) filtering. Moreover, it is shown through experiments that the DCT based processing can be more efficient than advanced nonlinear vector filters. As noise models, both additive noise and mixed additive and impulsive noise are used. Finally, the applicability of the DCT based filtering is studied when the noise is multiplicative; and a convenient way to reduce multiplicative noise to additive noise is proposed.


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