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Restoration method of characters on jiagu rubbings based on Poisson distribution and fractal geometry

Science China(Information Sciences) 2010年第7期53卷 1296-1304页

作者： GU ShaoTong1,2,3, FENG GeFei1,2,3, MA XiaoHu1,2,4 & YANG YiMing1,2,3 1Institute of Linguistics, Xuzhou Normal University, Xuzhou 221009, China 2Jiangsu College Key Lab of Linguistic Sciences and Neuro-cognition Engineering, Xuzhou Normal University, Xuzhou 221009, China 3Linguistic Science College, Xuzhou Normal University, Xuzhou 221009, China 4School of Computer Science and Technology, Soochow University, Suzhou 215006, China 1. Institute of Linguistics Xuzhou Normal University Xuzhou 221009 China2. Jiangsu College Key Lab of Linguistic Sciences and Neuro-cognition Engineering Xuzhou Normal University Xuzhou 221009 China3. Linguistic Science College Xuzhou Normal University Xuzhou 221009 China4. School of Computer Science and Technology Soochow University Suzhou 215006 China

A scheme for character restoration of jiagu rubbings based on Poisson distribution and fractal geometry is proposed in this paper. The distribution characteristics of the connected regions on jiagu rubbings is analyzed, and all the connected regions are recognized according to differences between these and their mathematical expectations. Regions are recognized as noise regions and filled if the differences are negative, while stroke regions are reserved. The attributes of the character image edges on jiagu rubbings are also analyzed. The fractal dimensions of the character edge of jiagu rubbings are calculated by means of statistics. The feature points are obtained using the cosine of the angle between the two vectors of the point and the consecutive two points. Different compression transformations with weighted coordinates are performed on different strokes and segments of the characters so as to smoothen the character edge of jiagu rubbings images. Experimental results show that our scheme could successfully clear noise regions and polish the character edge of jiagu rubbings.

关键词： jiagu rubbings Poisson distribution fractal geometry fractal dimension compression transformation character restoration

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