Creates an even/odd pair of 2D Gabor filters. Creates a pair of Gabor filters (one odd one even) at the specified orientation. For Thomas' ECCV98 filters, use sig=sqrt(2), lam=4. Note that originally this function computed a quadratic masked with a Gaussian, and not a sin/cos masked with a Gaussian. Requires Matlab's 'Signal Processing Toolbox'. USAGE [Feven,Fodd] = filterGabor2d( r, sig, lam, theta, [omega], [show] ) INPUTS r - final mask will be 2r+1 x 2r+1 sig - standard deviation of Gaussian mask lam - elongation of Gaussian mask theta - orientation (in degrees) omega - [1] wavlength of underlying sine (sould be >=1) show - [0] figure to use for optional display OUTPUTS Feven - even symmetric filter (-cosine masked with Gaussian) Fodd - odd symmetric filter (-sine masked with Gaussian) EXAMPLE [Feven,Fodd] = filterGabor2d(15,sqrt(2),4,45,1,1); [Feven,Fodd] = filterGabor2d(25,4,2,0,2,3); See also FILTERGABOR1D, FILTERGAUSS Piotr's Computer Vision Matlab Toolbox Version 2.12 Copyright 2014 Piotr Dollar. [pdollar-at-gmail.com] Licensed under the Simplified BSD License [see external/bsd.txt]