Journal of Systems Engineering and Electronics ›› 2013, Vol. 35 ›› Issue (3): 662-666.doi: 10.3969/j.issn.1001-506X.2013.03.37

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Algorithm for automatic removal of the sand symbols in map digitizing

XU Peng-fei1,YANG Yun2,3, MIAO Qi-guang1, MENG Ke-wen1, ZHANG Jun-ying1   

  1. 1. School of Computer Science and Technology, Xidian University, Xi’an 710071, China; 2. Department of Cartography
     and GeoInformation Engineering, Xi’an Research Institute of Surveying and Mapping, Xi’an 710054, China;3.State Key 
    Laboratory of Geo Information Engineering, Xi’an Research Institute of Surveying and Mapping, Xi’an 710054, China
  • Online:2013-03-20 Published:2010-01-03

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Abstract:

In the process of map-digitizing of desert regions, varieties of sand symbols seriously interfere with the vector processing of the cartographic feature, and the performance of the digitizing is restricted. The problem of the sand symbols removing in the scanned maps is aimed at. Through the analysis of the characteristics of different kinds of sand symbols, the morphology-based spur removing method is used to remove the sand symbols after the process of image binarization and morphology-based thinning. Moreover, the multi-level spur removing method is used for the complex sand symbols. Experiments indicate that the proposed method is able to remove different kinds of sand symbols in the scanned maps, which significantly contributes to automatic vectorization of the cartographic feature.

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