filter_steerable

PURPOSE ^

Steerable Gaussian derivative filter.

SYNOPSIS ^

function filter_steerable( theta )

DESCRIPTION ^

 Steerable Gaussian derivative filter.

 This function is meant for visualization only.  It is a demonstration of steerable
 filters.

 Analytically find Gx = dxG and Gy = dxG.  Then find the derivative of G in some
 arbitrary direction theta by taking a linear combination of Gx and Gy.  

 INPUTS
   theta   - orientation

 EXAMPLE
   filter_steerable( 30 )

 DATESTAMP
   29-Sep-2005  2:00pm

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:
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