Share Email Print

Proceedings Paper

Post processing for offline Chinese handwritten character string recognition
Author(s): YanWei Wang; XiaoQing Ding; ChangSong Liu
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Offline Chinese handwritten character string recognition is one of the most important research fields in pattern recognition. Due to the free writing style, large variability in character shapes and different geometric characteristics, Chinese handwritten character string recognition is a challenging problem to deal with. However, among the current methods over-segmentation and merging method which integrates geometric information, character recognition information and contextual information, shows a promising result. It is found experimentally that a large part of errors are segmentation error and mainly occur around non-Chinese characters. In a Chinese character string, there are not only wide characters namely Chinese characters, but also narrow characters like digits and letters of the alphabet. The segmentation error is mainly caused by uniform geometric model imposed on all segmented candidate characters. To solve this problem, post processing is employed to improve recognition accuracy of narrow characters. On one hand, multi-geometric models are established for wide characters and narrow characters respectively. Under multi-geometric models narrow characters are not prone to be merged. On the other hand, top rank recognition results of candidate paths are integrated to boost final recognition of narrow characters. The post processing method is investigated on two datasets, in total 1405 handwritten address strings. The wide character recognition accuracy has been improved lightly and narrow character recognition accuracy has been increased up by 10.41% and 10.03% respectively. It indicates that the post processing method is effective to improve recognition accuracy of narrow characters.

Paper Details

Date Published: 23 January 2012
PDF: 9 pages
Proc. SPIE 8297, Document Recognition and Retrieval XIX, 829709 (23 January 2012); doi: 10.1117/12.905985
Show Author Affiliations
YanWei Wang, Tsinghua Univ. (China)
XiaoQing Ding, Tsinghua Univ. (China)
ChangSong Liu, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 8297:
Document Recognition and Retrieval XIX
Christian Viard-Gaudin; Richard Zanibbi, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?