Title :
Visually lossless compression of synthetic aperture radar images
Author :
Ponomarenko, N.N. ; Lukin, V.V. ; Egiazarian, K.O.
Author_Institution :
Dept. of Transmitters, Receivers & Signal Process., Nat. Aerosp. Univ., Kharkov, Ukraine
Abstract :
A task of visually lossless but, in fact, lossy compression of synthetic aperture radar (SAR) images corrupted by intensive speckle is considered. A method based on discrete cosine transform (DCT) applied in 8×8 blocks is proposed. The method is adapted to spatial DCT spectrum of speckle and its multiplicative nature. It is shown that the proposed method allows providing compression ratio (CR) of about 3.2...3.5 for simulated and real life SAR images which is sufficiently larger than for image lossless compression techniques.
Keywords :
data compression; discrete cosine transforms; radar imaging; speckle; synthetic aperture radar; DCT method; SAR images; compression ratio; discrete cosine transform; image lossless compression techniques; spatial DCT spectrum; speckle; synthetic aperture radar images; visually lossless compression; Discrete cosine transforms; Filtering; Image coding; Noise; Quantization; Speckle; Synthetic aperture radar;
Conference_Titel :
Antenna Theory and Techniques (ICATT), 2011 VIII International Conference on
Conference_Location :
Kyiv
Print_ISBN :
978-1-4577-2211-0
DOI :
10.1109/ICATT.2011.6170755
