ACCELERATION AND EFFICIENCY ANALYSIS OF DCT-BASED FILTERING

V. V. Lukin; S. S.  Krivenko; E.O.  Kolganova; M.K.  Chobanu

doi:10.1615/TelecomRadEng.v72.i7.50

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Home > Journals > Telecommunications and Radio Engineering > Volume 72, 2013 Issue 7 > ACCELERATION AND EFFICIENCY ANALYSIS OF DCT-BASED FILTERING

ISSN Print: 0040-2508
ISSN Online: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v72.i7.50
pages 613-626

ACCELERATION AND EFFICIENCY ANALYSIS OF DCT-BASED FILTERING

V. V. Lukin
National Aerospace University (Kharkiv Aviation Institute), 17 Chkalov St., Kharkiv, 61070, Ukraine

S. S. Krivenko
Dept 504, National Aerospace University, 17 Chkalova Str., 61070, Kharkiv, Ukraine

E.O. Kolganova
National Aviation University, 1 Kosmonavta Komarova Av., 03058, Kyiv, Ukraine

M.K. Chobanu
National Research University "Moscow Power Engineering Institute", Moscow, Russia

ABSTRACT

Ways to accelerate image denoising based on discrete cosine transform are considered. A main emphasis is on data processing in partially overlapping blocks of size 8×8 pixels. Two thresholding operations are studied. A simple local adaptation procedure is proposed and its efficiency is analyzed. Comparison of filtering efficiency is carried out using several quality metrics, both standard and based on peculiarities of human visual system. It is demonstrated that, compared to full-overlapping denoising, loss in filtering efficiency can be appropriately small if locally adaptive processing with half block size overlapping and combined thresholding is applied.

KEY WORDS: noise, DCT-based filtering, block overlapping, thresholding, local adaptation