Clustering document fragments using background color and texture information

Sukalpa Chanda; Katrin Franke; Umapada Pal

doi:10.1117/12.910567

23 January 2012 Clustering document fragments using background color and texture information

Sukalpa Chanda, Katrin Franke, Umapada Pal

Proceedings Volume 8297, Document Recognition and Retrieval XIX; 82970U (2012) https://doi.org/10.1117/12.910567
Event: IS&T/SPIE Electronic Imaging, 2012, Burlingame, California, United States

Abstract

Forensic analysis of questioned documents sometimes can be extensively data intensive. A forensic expert might need to analyze a heap of document fragments and in such cases to ensure reliability he/she should focus only on relevant evidences hidden in those document fragments. Relevant document retrieval needs finding of similar document fragments. One notion of obtaining such similar documents could be by using document fragment's physical characteristics like color, texture, etc. In this article we propose an automatic scheme to retrieve similar document fragments based on visual appearance of document paper and texture. Multispectral color characteristics using biologically inspired color differentiation techniques are implemented here. This is done by projecting document color characteristics to Lab color space. Gabor filter-based texture analysis is used to identify document texture. It is desired that document fragments from same source will have similar color and texture. For clustering similar document fragments of our test dataset we use a Self Organizing Map (SOM) of dimension 5×5, where the document color and texture information are used as features. We obtained an encouraging accuracy of 97.17% from 1063 test images.

Citation Download Citation

Sukalpa Chanda, Katrin Franke, and Umapada Pal "Clustering document fragments using background color and texture information", Proc. SPIE 8297, Document Recognition and Retrieval XIX, 82970U (23 January 2012); https://doi.org/10.1117/12.910567

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