Maximizing Sum of Image Intensity Square Autofocus Algorithm

Author

Xugang, Gao ; Weimin, Su ; Hong, Gu

Author_Institution

Sch. of Electron. Eng. & Optoelectron. Technol., Nanjing Univ. of Sci. & Technol., Nanjing, China

fYear

2010

fDate

30-31 Jan. 2010

Firstpage

170

Lastpage

172

Abstract

This High quality Synthetic Aperture Radar (SAR) imaging requires that azimuth frequency modulation rate is accurately estimated. A new algorithm is proposed for autofocus in synthetic aperture radar imaging. Based on image contrast, the paper analyses the relationship between maximizing sum of image intensity square and image contrast function, and maximizing sum of image intensity square autofocus algorithm is presented. Then the bisection which substitutes for advance and retreat method reduces computation. The processing results of the measured data shows better convergence speed of bisection and the validity of the proposed algorithm.

Keywords

FM radar; optimisation; radar imaging; synthetic aperture radar; frequency modulation rate; image contrast function; image intensity square autofocus algorithm; maximization; synthetic aperture radar imaging; Algorithm design and analysis; Azimuth; Convergence; Frequency estimation; Image analysis; Marine technology; Optimization methods; Phase estimation; Radar imaging; Synthetic aperture radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Innovative Computing & Communication, 2010 Intl Conf on and Information Technology & Ocean Engineering, 2010 Asia-Pacific Conf on (CICC-ITOE)

Conference_Location

Macao

Print_ISBN

978-1-4244-5634-5

Electronic_ISBN

978-1-4244-5635-2

Type

conf

DOI

10.1109/CICC-ITOE.2010.51

Filename

5439241