SAR IMAGE LOSSY COMPRESSION WITHOUT VISUALLY NOTICEABLE DISTORTIONS

N.N. Ponomarenko, V.V. Lukin, D.V. Fevralev, A.A. Zelensky

The methods of lossy compression of images formed by synthetic aperture radar (SAR) and distorted by spatially-correlated speckle are analyzed. Compression settings for discrete cosine transform (DCT) based compression are chosen so that the distortions introduced are not visually noticeable that allows further using different procedures secondary processing applied to decompressed images. The statistical characteristics of residual noise and the values of metrics that characterize visual image quality after compression are studied. The tasks of further investigations are formulated.

Keywords: image lossy compression, multiplicative noise, visual quality metric