Two-dimensional Extension of Nonlinear Normalization Method using Line Density for Character Recognition

Authors:
Takahiko Horiuchi;Ryoji Haruki;Hiromitsu Yamada;Kazuhiko Yamamoto
Affiliations:
-;-;-;-
Venue:
ICDAR '97 Proceedings of the 4th International Conference on Document Analysis and Recognition
Year:
1997

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Abstract

A part of the authors have been proposed a few nonlinear normalization methods using line density for handwritten characters and it was verified that those nonlinear methods were more effective than a linear method. Those nonlinear methods, however, could not use two-dimensional information of the line density, because the line density was projected on to the axes of coordinates. This paper proposes an extended nonlinear normalization method which uses two-dimensional information of the line density. It is confirmed that the proposed method is more powerful than conventional methods by experiments tested on the handwritten character database ETL-8.