Segmentation-directed SAR image compression via hierarchical stochastic modeling

Andrew J. Kim; A. Hamid Krim; Alan S. Willsky

doi:10.1117/12.271730

3 April 1997 Segmentation-directed SAR image compression via hierarchical stochastic modeling

Andrew J. Kim, A. Hamid Krim, Alan S. Willsky

Proceedings Volume 3078, Wavelet Applications IV; (1997) https://doi.org/10.1117/12.271730
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

There has recently been a growing interest in SAR imaging on account of its importance in a variety of applications. One reason for its gain in popularity is its ability to image terrain at extraordinary rates. Acquiring data at such rates, however, has drawbacks in the from of exorbitant costs in data storage and transmission over relatively slow channels. To alleviate these and related costs, we propose a segmentation driven compression technique using hierarchical stochastic modeling within a multiscale framework. Our approach to SAR image compression is unique in that we exploit the multiscale stochastic structure inherent in SAR imagery. This structure is well captured by a set of scale auto-regressive models that accurately characterize the evolution in scale of homogeneous regions for different classes of terrain. We thus use them to generate a multiresolution segmentation of the image. We subsequently use the segmentation in tandem with the corresponding models within a pyramid encoder to provide a robust, hierarchical compression technique which in addition to coding the segmentation, codes the image with high compression ratios and remarkable image quality.

Citation Download Citation

Andrew J. Kim, A. Hamid Krim, and Alan S. Willsky "Segmentation-directed SAR image compression via hierarchical stochastic modeling", Proc. SPIE 3078, Wavelet Applications IV, (3 April 1997); https://doi.org/10.1117/12.271730

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