A real-time compressing method for complex SAR images

Author

Weiping, Xia ; Zhensong, Wang ; Jiefu, Zhai ; Han Jizhong

Author_Institution

Inst. of Comput. Technol., Chinese Acad. of Sci., Beijing, China

Volume

1

fYear

2004

fDate

31 Aug.-4 Sept. 2004

Firstpage

816

Abstract

Complex image compression is widely used in diverse remote sensing applications in order to reduce the costs of data storage and release the burden of data transmission on limited data transmission channels. However, the huge amount of data makes it difficult to compress in real-time. A novel real-time compressing method for complex SAR images is presented in this paper. The system uses a fixed-point DSP of TI SM320c6416 with IGB SDRAM (synchronous dynamic random access memory). After removing the redundancy of complex image in frequency domain, arithmetic codec is applied for statistical redundancy, further. With the least data regress limes, good performance is achieved. The results show that compressing a complex image of 8192*2048 needs only 4315 ms in an acceptable distortion with compression ratio of 16.214:1. So, the method is highly suitable for real-time (or low delay) applications.

Keywords

arithmetic codes; data compression; image coding; radar imaging; random-access storage; arithmetic codec; complex SAR image; complex image compression; data storage; data transmission channels; diverse remote sensing; real-time compressing method; statistical redundancy; synchronous dynamic random access memory; Arithmetic; Codecs; Costs; Data communication; Digital signal processing; Frequency domain analysis; Image coding; Memory; Remote sensing; SDRAM;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing, 2004. Proceedings. ICSP '04. 2004 7th International Conference on

Print_ISBN

0-7803-8406-7

Type

conf

DOI

10.1109/ICOSP.2004.1452788

Filename

1452788