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Topological Image Texture Analysis for Quality Assessment

 Rasber Dh. Rashid
Department of Software Engineering, Faculty of Engineering, Koya University

Abstract:  Image quality is a major factor influencing pattern recognition accuracy and help detect image tampering for forensics.We are concerned with investigating topological image texture analysis techniques to assess different type of degradation. We use Local Binary Pattern (LBP) as a texture feature descriptor. For any image construct simplicial complexes for selected groups of uniform LBP bins and calculate persistent homology invariants (e.g. number of
connected components). We investigated image quality discriminating characteristics of these simplicial complexes by
computing these models for a large dataset of face images that are affected by the presence of shadows as a result of variation in illumination conditions. Our tests demonstrate that for specific uniform LBP patterns, the number of connected component not only distinguish between different levels of shadow effects but also help detect the infected regions as well.

Keywords: Image quality+ simplicial complexes + Local binary Patterns 

Date: 08/05/2017
Place: Faculty of Engineering/ Nashmeil Hall