Invariant Image Recognition by Zernike Moments
IEEE Transactions on Pattern Analysis and Machine Intelligence
Twenty Years of Document Image Analysis in PAMI
IEEE Transactions on Pattern Analysis and Machine Intelligence
Algorithms for Graphics and Imag
Algorithms for Graphics and Imag
Computer Vision
Fine-Grained Document Genre Classification Using First Order Random Graphs
ICDAR '01 Proceedings of the Sixth International Conference on Document Analysis and Recognition
State of the art of graph-based data mining
ACM SIGKDD Explorations Newsletter
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Document image classification is an important step in document image analysis. Based on classification results we can tackle other tasks such as indexation, understanding or navigation in document collections. Using a document representation and an unsupervized classification method, we can group documents that from the user point of view constitute valid clusters. The semantic gap between a domain independent document representation and the user implicit representation can lead to unsatisfactory results. In this paper we describe document images based on frequent occurring symbols. This document description is created in an unsupervised manner and can be related to the domain knowledge. Using data mining techniques applied to a graph based document representation we found frequent and maximal subgraphs. For each document image, we construct a bag containing the frequent subgraphs found in it. This bag of “symbols” represents the description of a document. We present results obtained on a corpus of graphical document images.