Detection and Reconstruction Scheme for Broken Characters in Thai Ch aracter Recognition Systems

概要

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This paper proposes an effective scheme for detection and reconstruction of broken printed Thai character images, which are one of the major problems in character recognition systems. This problem is still unsolved in commercially available Thai character recognition software packages. The proposed reconstruction method is based on the segment boundaries and distinctive features of Thai characters. This scheme consists of two steps: determination of the number of segments belonging to a character and reconstruction of that particular character image. In the first step, it is determined whether each segment is a part of a broken character by using an area of overlap between broken segment boundaries. Then, the number of segments belonging to a character image is determined. The reconstruction techniques are based on the number of broken segments. The projection profile, an overlapping area, and its location are employed to indicate the appropriate areas for connecting broken segments. The test results reveal that the construction is very accurate. The reconstructed characters were also tested by using commercially available Thai character recognition software packages. The test results showed that the proposed scheme significantly improves the recognition rate of the software.
一般社団法人情報処理学会の論文
2002-06-15