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Geo-spatial Information Science

, Volume 6, Issue 2, pp 35–41 | Cite as

Change detection based on DSM and image features in urban areas

  • Liu Zhifang
  • Zhang Jianqing
  • Zhang Zuxun
  • Fan Hong
Article

Abstract

On the basis of stereo image analysis, the change detection of man-made objects in urban areas is introduced. Information of the height of man-made objects can be applied to reinforce their change detection. By comparison between the new and old DSMs, the changed regions are extracted. However, our aim is to detect changes of man-made objects in urban area and further in the potential areas by the means of line-feature matching and gradient direction histogram. The experiments based on the aerial images from Japan have proven that the algorithm is correct and efficient.

Key words

change detection DSM gradient direction histogram image matching house detection 

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Copyright information

© Wuhan University of Technology 2003

Authors and Affiliations

  • Liu Zhifang
    • 1
  • Zhang Jianqing
  • Zhang Zuxun
  • Fan Hong
  1. 1.Institute of Image & GraphicSichuan UniversityChengduChina

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