"forthood.raw" is a raw image with 512 columns and 512 rows. The intensity
at each pixel is represented by one byte.


    forthood.dwbed.3.lbed keeps the data of these linked edges by using the
directional Wang-Binford edge detector and the linker based on locally
constant curvature hypothesis.

    forthood.canny.3.lbed keeps the data of these linked edges by using the
Canny edge detector and the linker based on locally constant curvature
hypothesis.

    To load the *.lbed files, you may take a look at the example algorithms
in io-functions.lisp and io-functions.c. lbed-format.ps explains some detail
about the data structure of lbed files.  You have to modify them
to fit into your purpose. 
    
    linked-edges-5.canny.ps and linked-edges-5.dwbed.ps show the linked edges
with length longer than 5.

    linked-edges-20.canny.ps and linked-edges-20.dwbed.ps show the linked edges
with length longer than 20.