Journal on Communications ›› 2017, Vol. 38 ›› Issue (2): 34-43.doi: 10.11959/j.issn.1000-436x.2017026

• Papers • Previous Articles     Next Articles

Remote sensing image segmentation based on spatially constrained Gaussian mixture model with unknown class number

Quan-hua ZHAO,Xue SHI,Yu WANG,Yu LI   

  1. Institute for Remote Sensing Science and Application,School of Geomatics,Liaoning Technical University,Fuxin 123000,China
  • Revised:2016-11-23 Online:2017-02-01 Published:2017-07-20
  • Supported by:
    The National Natural Science Foundation of China(41301479);The National Natural Science Foundation of China(41271435)

Abstract:

In view of the traditional Gaussian mixture model (GMM),it was difficult to obtain the number of classes and sensitive to the noise.A remote sensing image segmentation method based on spatially constrained GMM with unknown number of classes was proposed.First,in the built GMM,prior probability that represented the membership between a pixel and one class was modeled as a Markov random field (MRF).In order to improve the sensitivity of noise,the smoothing factor was defined by combining the a posterior probability and the prior probability of neighboring pixels.For estimating the number of classes and the parameters of model,the reversible jump Markov chain Monte Carlo (RJMCMC) and maximum likelihood (ML) estimation were employed,respectively.Finally,by minimizing the smoothing factor the final segmentation was obtained.In order to verify the proposed segmentation method,the synthetic and real panchromatic images were tested.The experimental results show that the proposed method is feasible and effective.

Key words: Gaussian mixture model (GMM), spatially constrained, maximum likelihood (ML), reversible jump Markov chain Monte Carlo (RJMCMC), remote sensing image segmentation

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