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This is the readme file to provide some information about the Fortran
codes used in the numerical study of the paper

   Kang, Y., and Qiu, P., "Jump detection in blurred regression 
                          surfaces,"
   Technometrics, accepted.

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To use the following Fortran codes, you need to convert the observed
images from the current format (e.g., eps, gif) to the text (or ascii) 
format. In our codes, the SAR image in text format are assumed to be 
saved in files "sar.dat"

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The Fortran source codes for jump detectors LCK, LC2K, LLK and LL2K 
are respectively
   lck.f90
   lc2k.f90
   llk.f90
   ll2k.f90

They use the following Fortran subroutines (users may choose not to use
the two modification procedures):
   extend.f90  --- extend image to avoid boundary problems
   modify1.f --- modification procedure to make detected JLCs thin
   modify2.f --- modification procedure to delete deceptive detected
                 jump points scattered over design space
   ker.f90 --- 2-D kernel function
   ker1.f90 --- 1-D kernel function

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In the paper, there are two real-data examples. The data files are described 
below. Again, you need to convert it to text files (useing software packages 
such as XV) before apply the above Fortran codes to these data files.

sar.eps   --- EPS file of the synthetic aperture radar image of an area
              near the Thetford forest in England.
kid.eps   --- EPS file of a child taking test.

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