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Text-Line Extraction in Handwritten Chinese Documents Based on an Energy Minimization Framework

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2 Author(s)
Hyung Il Koo ; Qualcomm R&D Center, Seoul, South Korea ; Nam Ik Cho

Text-line extraction in unconstrained handwritten documents remains a challenging problem due to nonuniform character scale, spatially varying text orientation, and the interference between text lines. In order to address these problems, we propose a new cost function that considers the interactions between text lines and the curvilinearity of each text line. Precisely, we achieve this goal by introducing normalized measures for them, which are based on an estimated line spacing. We also present an optimization method that exploits the properties of our cost function. Experimental results on a database consisting of 853 handwritten Chinese document images have shown that our method achieves a detection rate of 99.52% and an error rate of 0.32%, which outperforms conventional methods.

Published in:

Image Processing, IEEE Transactions on  (Volume:21 ,  Issue: 3 )