P.  Selvarani, V.  Vaithyanathan, 
    Coarse to Fine Level Set Segmentation of SAR Imagery Based on The Brovey Transform Fusion of Optical Imagery,
    Research Journal of Applied Sciences,
    Volume 7,Issue 7,
    2012,
    Pages 334-339,
    ISSN 1815-932x,
    rjasci.2012.334.339,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2012.334.339)
    Abstract: This study delivers a new approach for contour extraction 
  in different terrains of the same location of both SAR images and optical images 
  using a coarse to fine level set scheme. Segmentation in both SAR and optical 
  imagery is a trivial challenge for many researchers. The main target is to segment 
  buildings, lands and oil tanks perfectly via fusion with a level set method. 
  First Brovey transform is applied in fusing both SAR images and optical images. 
  Discrete wavelet transform is utilized for extracting an image from a background. 
  Finally in order to segment an image a coarse to fine level set is implemented. 
  Experiments have been carried out on quick bird and Terra SAR-x images to validate 
  the proposed methodology.
    Keywords: Brovey fusion;coarse to fine level set;discrete wavelet transform;SAR image;optical image;contour extraction