Title :
Space-time analysis and iterative focusing for synthetic aperture sonar
Author :
Ochieng-Ogolla, Ezackiel
Author_Institution :
Bremen Univ., Germany
Abstract :
In this paper, we describe a space-time analysis for synthetic aperture sonar (SAS) employing Green´s functions, and show that it´s basically an inverse problem. Iterative focusing is proposed based on this viewpoint. In order to mitigate difficulties of slow convergence and computational costs inherent in iterative methods, an acceleration technique is used. Applications to SAS imaging is demonstrated through reconstructions from simulated data, with emphasis on high resolution and image quality
Keywords :
Green´s function methods; acoustic signal processing; convergence of numerical methods; filtering theory; focusing; image reconstruction; image resolution; inverse problems; iterative methods; sonar imaging; Green´s functions; SAS imaging; acceleration technique; computational costs; high resolution imaging; image quality; image reconstruction; inverse problem; iterative focusing; slow convergence; space-time analysis; synthetic aperture sonar; Acceleration; Computational efficiency; Convergence; Focusing; Green´s function methods; High-resolution imaging; Image reconstruction; Inverse problems; Iterative methods; Synthetic aperture sonar;
Conference_Titel :
Image Processing, 1996. Proceedings., International Conference on
Conference_Location :
Lausanne
Print_ISBN :
0-7803-3259-8
DOI :
10.1109/ICIP.1996.560948
