Ensemble methods with simple features for document zone classification

Tayo Obafemi-Ajayi; Gady Agam; Bingqing Xie

doi:10.1117/12.912103

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23 January 2012 Ensemble methods with simple features for document zone classification

Tayo Obafemi-Ajayi, Gady Agam, Bingqing Xie

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Proceedings Volume 8297, Document Recognition and Retrieval XIX; 829706 (2012) https://doi.org/10.1117/12.912103
Event: IS&T/SPIE Electronic Imaging, 2012, Burlingame, California, United States

Abstract

Document layout analysis is of fundamental importance for document image understanding and information retrieval. It requires the identification of blocks extracted from a document image via features extraction and block classification. In this paper, we focus on the classification of the extracted blocks into five classes: text (machine printed), handwriting, graphics, images, and noise. We propose a new set of features for efficient classifications of these blocks. We present a comparative evaluation of three ensemble based classification algorithms (boosting, bagging, and combined model trees) in addition to other known learning algorithms. Experimental results are demonstrated for a set of 36503 zones extracted from 416 document images which were randomly selected from the tobacco legacy document collection. The results obtained verify the robustness and effectiveness of the proposed set of features in comparison to the commonly used Ocropus recognition features. When used in conjunction with the Ocropus feature set, we further improve the performance of the block classification system to obtain a classification accuracy of 99.21%.

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Tayo Obafemi-Ajayi, Gady Agam, and Bingqing Xie "Ensemble methods with simple features for document zone classification", Proc. SPIE 8297, Document Recognition and Retrieval XIX, 829706 (23 January 2012); https://doi.org/10.1117/12.912103

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KEYWORDS

Visualization

Feature extraction

Data modeling

Image segmentation

Image classification

Classification systems

Digital filtering

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