Recognition of Handprinted Thai Characters Using Loop Structures

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概要

• 論文の詳細を見る

• A method for the recognition of handprinted Thai characters input using an image scanner is presented. We use methods of edge detection and boundary contour tracing algorithms to extract loop structures from input characters. The number of loops and their locations are detected and used as information for rough classification. For fine classification, local feature analysis of Thai characters is presented to discriminate an output character from a group of similar characters. In this paper, four parts of the recognition system are presented: Preprocessing, single-character segmentation, loop structure extraction and character identification. Preprocessing consists of pattern binarization, noise reduction and slant normalization based on geometrical transformation for the forward (backward) slanted word. The method of single-character segmentation is applied during the recognition phase. Each character from an input word including the character line level information is subjected to the processes of edge detection, contour tracing and thinning to detect loop structures and to extract topological properties of strokes. The decision trees are constructed based on the obtained information about loops, end points of strokes and some local characteristics of Thai characters. The proposed system is implemented on a personal computer, and a high recognition rate is obtained for 1000 samples of handprinted Thai words from 20 subjects.

• 社団法人電子情報通信学会の論文
• 1996-09-25

著者

• Airphaiboon Surapan

  Department Of Electrical Engineering King Mongkut's Institute Of Technology Ladkrabang

• Airphaiboon Surapan

  Department Of Electronics Faculty Of Engineering King Mongkut's Institute Of Technology Ladkrab

• Kondo Shozo

  Department Of Communication Engineering Faculty Of Engineering Tokai University

• Kondo Shozo

  Department Of Communications Faculty Of Engineering Tokai University

関連論文

• Wavelet and Fractal Theories, and Their Application to Image Processing
• Recognition of Handprinted Thai Characters Using Loop Structures
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• Image Restoration Theory Using Interconnection of Images Decomposed by Wavelet Transform ((放送方式、放送現業、無線・光伝送)2000 Asia-Pacific Symposium on Broadcasting and Communications)
• A Color Image Coding Using Subband Correlations by the Wavelet Transform
• IRIS LOCALIZATION BASE ON WAVELET TRANSFORM AND CONTOUR FOLLOWING TECHNIQUE

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