Compression of RADARSAT data with block adaptive wavelets

Author

Cumming, Ian ; Wang, Jing

Author_Institution

Dept. of ECE, British Columbia Univ., Vancouver, BC, Canada

fYear

2003

fDate

25-27 March 2003

Firstpage

419

Abstract

Summary form only given. A new algorithm, referred to as the wavelet packet-based embedded blocking code (WPEB), was developed for synthetic aperture radar (SAR) data compression. This algorithm combines the different properties of wavelet packet decomposition, block coding, and speckle reduction. Better results were obtained by using the wavelet packet transform that decomposes the higher frequencies. The higher coding efficiency can be obtained by dynamically allocating bits according to block variances. The examples using RADARSAT data have shown that compression performance is better than conventional wavelet methods. Visual image interpretation was found acceptable at 1 bpp.

Keywords

block codes; data compression; geophysical signal processing; image coding; radar imaging; remote sensing by radar; spaceborne radar; synthetic aperture radar; transform coding; wavelet transforms; RADARSAT data; SAR; WPEB scheme; block adaptive wavelet; block coding; block variances; coding efficiency; compression performance; data compression; high frequency decomposition; speckle reduction; synthetic aperture radar; visual image interpretation; wavelet packet decomposition; wavelet packet transform; wavelet packet-based embedded blocking code; Block codes; Data compression; Discrete wavelet transforms; Dynamic range; Frequency; Layout; Radio spectrum management; Speckle; Synthetic aperture radar; Wavelet packets;

fLanguage

English

Publisher

ieee

Conference_Titel

Data Compression Conference, 2003. Proceedings. DCC 2003

ISSN

1068-0314

Print_ISBN

0-7695-1896-6

Type

conf

DOI

10.1109/DCC.2003.1194038

Filename

1194038