Module filter 

Available on crate feature v2_5 only.

Functions

gaussian_kernel

This function constructs a Gaussian kernel parameterized by alpha and stores the output in kernel. The parameter order specifies the derivative order, with 0 corresponding to a Gaussian, 1 corresponding to a first derivative Gaussian, and so on. If normalize is set to true, then the kernel will be normalized to sum to one on output. If normalize is set to false, no normalization is performed.