filter_DOG_2D

PURPOSE ^

Difference of Gaussian (Dog) Filter.

SYNOPSIS ^

function G = filter_DOG_2D( r, sig, order, show )

DESCRIPTION ^

 Difference of Gaussian (Dog) Filter.

 Adapted from code by Serge Belongie.  Takes a "difference of Gaussian" - all centered
 on the same point but with different values for sigma.  

 INPUTS
   r       - Final filter will be 2*r+1 on each side
   sig     - standard deviation of central Gaussian
   order   - should be either 1 or 2
   show    - [optional] figure to use for display (no display if == 0)

 OUTPUTS
   G       - final filter

 EXAMPLE
   G = filter_DOG_2D( 6, 3, 1, 1 );

 DATESTAMP
   29-Sep-2005  2:00pm

 See also FILTER_DOOG_2D

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:
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