文章基本信息

标题：Tracing and Straightening the Baseline in Handwritten Persian/Arabic Text-line: A New Approach Based on Painting-technique
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作者：P. Nagabhushan ; Alireza Alaei
期刊名称：International Journal on Computer Science and Engineering
印刷版ISSN：2229-5631
电子版ISSN：0975-3397
出版年度：2010
卷号：2
期号：4
页码：907-916
出版社：Engg Journals Publications
摘要：In this research work, we propose to identify an imaginary line called baseline threading through the entire stretch of text-line, with reference to which the location of vertical extents of Persian characters could be accurately interpreted. Depending upon the curvedness of the handwritten Persian text-line the baseline also would be curved. In this research a novel piece-wise painting scheme is proposed to prepare patches of black and white blocks all along the text-line, identify some candidate points, regress a curve through these candidate points to trace the baseline which is subsequently stretched straight horizontally and subsequently we de-tilt the characters to align the text-line with the horizontal imaginary baseline properly. The proposed algorithm is evaluated with 108 Persian handwritten text-lines containing 3612 subwords. Experimental analysis showed that 91.2% of the subwords are accurately aligned. Further, the proposed scheme is tested with another dataset containing 600 text-lines [13] and more accurate results are achieved when compared with the results reported in state of the art for the same dataset. The effectiveness of aligning text-lines linearly is demonstrated through OCRing for readability of tilted printed English text-lines and corresponding transformed text-lines, which are obtained using the proposed procedure.
关键词：Handwritten Document; Baseline; Piece-wise Painting; Curve Fitting.