Journal of Xidian University

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Novel method of destroyed document reconstruction

XING Nan1,2;ZHANG Jianqi1;LIU Pengfei1;CAO Furong1   

  1. (1. School of Physics and Optoelectronic Engineering, Xidian Univ., Xian 710071, China;
    2. School of Automation and Information Engineering, Xian Univ. of Technology, Xian 710048, China)
  • Received:2017-12-14 Online:2018-08-20 Published:2018-09-25

Abstract:

To solve the problem that it is difficult to recover the paper document destroyed by a shredder, a novel method for destroyed document reconstruction is proposed. First, based on the structural characteristics of Chinese words, the structural block model of the character in shred is built, and the structural blocks are identified by a classifier. Second, the matching degrees between shreds are measured by the matching probability and the number of mismatches between structural blocks. Third, the two matching measures are fused to generate an evaluation function for the global matching of shreds. Finally, based on the evaluation function, the best matching of shreds is realized by the genetic algorithm. Experimental results show that the proposed method can effectively restrain the effect of information loss, etc.  on the document reconstruction, and that it achieves a higher reconstruction accuracy than the existing methods.

Key words: document reconstruction, structural block, evaluation function, security of data, information technology