# filterSteerable

## PURPOSE

Steerable 2D Gaussian derivative filter (for visualization).

## SYNOPSIS

function filterSteerable( theta )

## DESCRIPTION

     Steerable 2D Gaussian derivative filter (for visualization).

     This function is a demonstration of steerable filters.  The directional
     derivative of G in an arbitrary direction theta can be found by taking a
     linear combination of the directional derivatives dxG and dyG.

     USAGE
      filterSteerable( theta )

     INPUTS
      theta   - orientation in radians

     OUTPUTS

     EXAMPLE
      filterSteerable( pi/4 );

     See also filterGauss

     Piotr's Image&Video Toolbox      Version 2.0
     Copyright 2008 Piotr Dollar.  [pdollar-at-caltech.edu]
     Please email me if you find bugs, or have suggestions or questions!
     Licensed under the Lesser GPL [see external/lgpl.txt]

## CROSS-REFERENCE INFORMATION

This function calls:

- montage2 Used to display collections of images and videos.

This function is called by: