Function_2D::Base_2D  Base class for the other functions 
Function_2D::Canny_Deriche 
Not normalized 
Function_2D::Direct_interface_2D  Provides a direct interface to the class Base_2D 
Function_2D::FFT_normalized_gaussian  FFT of a gaussian function normalized to 1 
Function_2D::Filter_interface_2D  Extends Base_2D class to control scale with sigma values 
Function_2D::Gabor  Gabor filter (normalized gaussian modulated by a sine:
) 
Function_2D::Gaussian  Very basic gaussian function

Function_2D::Gaussian_step 

Function_2D::Gaussian_x_2nd_derivative 

Function_2D::Gaussian_x_derivative 

Function_2D::Gaussian_y_derivative 

Function_2D::Minus< Function1, Function2 >  
Function_2D::Normalized_gaussian  Gaussian function normalized to 1 
Function_2D::Normalized_gaussian_step  Gaussian function normalized to 1 multiplied by

Function_2D::Normalized_gaussian_x_2nd_derivative  Second Xderivative of a gaussian function normalized to 1 
Function_2D::Normalized_gaussian_x_derivative  Xderivative of a gaussian function normalized to 1 
Function_2D::Normalized_gaussian_y_derivative  Xderivative of a gaussian function normalized to 1 
Function_2D::Riesz_1 

Function_2D::Riesz_2 

Function_2D::Shen_Castan 
