DerivativeSpec data structure

STRUCTURE

This structure is an aggregate of common parameters for derivative operators. Its current definition is:

typedef struct
{
   dip_DerivativeFlavour flavour;
   dip_float truncation;
} dip_DerivativeSpec;

The enumerator flavour parameter is one of:

Name	Description
`DIP_DF_DEFAULT`	Default derivative flavour (==`DIP_DF_FIRGAUSS`)
`DIP_DF_FIRGAUSS`	Gaussian family, FIR implementation, `Gauss`
`DIP_DF_IIRGAUSS`	Gaussian family, IIR implementation, `GaussIIR`
`DIP_DF_FTGAUSS`	Gaussian family, FT implementation, `GaussFT`
`DIP_DF_FINITEDIFF`	Finite difference implementation, `FiniteDifferenceEx`