Rate distortion functions of sar imagery
R. W. Okkes, W. Huisman · 1986
SAR imagery are characterized by socalled speckle that gives a noisy appearance to these images. Application of non-reversible data compression methods results in a reduced bit rate at the cost of distortion in the SAR data. The distortion is measured with respect to a reference image, i.e. a speckle free image determined by the ground scene and the SAR system characteristics. The bit rate for an optimal encoder is determined for cases whereby an appropriate filter is used prior to data compression and after data compression respectively. Results are also presented for the case that practical encoding schemes are used for the compression of SAR imagery.