Ghada S. El-Taweel

Work place: Suez Canal University, Faculty of Computers and Informatics, Ismailia, Egypt

E-mail: ghada@ci.suez.edu.eg

Website:

Research Interests: Image Processing, Information Systems, Information Retrieval, Multimedia Information System

Biography

Gh. S. El-Tawel received B.S., M.S., in computer Sciences and Ph.D. degree in Information technology from Cairo University in 1996, 2000, and 2005 respectively. She is currently an associate Professor in Suez Canal University, Ismailia, Egypt. Her research interests include image processing, DNA, and information fusion.

Author Articles
Adaptive Local Means Filter for Polarimetric SAR Images; Despeckling for Homogeneous and Heterogeneous Clutter Models

By Ashraf K. Helmy Ghada S. El-Taweel

DOI: https://doi.org/10.5815/ijitcs.2016.11.05, Pub. Date: 8 Nov. 2016

Polarimetric radar images suffer from the presence of speckles that degrade the received signal and introduce untruthful indications about the nature of the objects. In this study, we proposed a new framework to filter polarimetric images in which the edges and the channel correlation are preserved. Through a proposed scheme, the image is segmented into groups of regular and irregular pixels. The segmentation process is based on the homogeneity of the texture variation throughout the image. In the homogeneous area, speckle reduction is performed using the adaptive local mean of the neighboring pixels. For non-homogeneous surfaces, the scheme works independently for each set of resolution cells using the general product model containing both intensity and texture information. Quantitative and qualitative assessments confirmed that the proposed filter achieved highly ranked order; it has the ability to preserve fine details, polarimetric information, and to maintain the scattering mechanism of the different objects.

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