FilterKernel

Implementation of various volumetric filter kernels.

Filter Type

Filter types defined by the ftype key include:

Type	Descrition
mean	uniform averaging filter
gaussian	Gaussian filter
log	Laplacian of Gaussian filter (LoG)
dog	Difference of Gaussians filter (DoG)
sphere	Sphere filter
disk	Disk filter

filter_kernel(ftype='Gaussian', shape=(5, 5), radius=None, sigma=None, sigma2=None)

Creates a filter kernel of a special type

Arguments

ftypestr

Filter type, see Filter Type.

shapearray or tuple

Shape of the filter kernel.

radiustuple or float

Radius of the kernel (if applicable).

sigmatuple or float

Std for the first gaussian (if applicable).

sigma2tuple or float

Std of a second gaussian (if present).

Returns

kernelarray

Filter kernel.

filter_kernel_2d(ftype='Gaussian', shape=(5, 5), sigma=None, sigma2=None, radius=None)

Creates a 2d filter kernel of a special type

Arguments

ftypestr

Filter type, see Filter Type.

shapearray or tuple

Shape of the filter kernel.

radiustuple or float

Radius of the kernel (if applicable).

sigmatuple or float

Std for the first gaussian (if applicable).

sigma2tuple or float

Std of a second gaussian (if present).

Returns

kernelarray

Filter kernel.

filter_kernel_3d(ftype='Gaussian', shape=(5, 5, 5), sigma=None, sigma2=None, radius=None)

Creates a 3d filter kernel of a special type

Arguments

ftypestr

Filter type, see Filter Type.

shapearray or tuple

Shape of the filter kernel.

radiustuple or float

Radius of the kernel (if applicable).

sigmatuple or float

Std for the first gaussian (if applicable).

sigma2tuple or float

Std of a second gaussian (if present).

Returns

kernelarray

Filter kernel.