RavenFilter

Summary

RavenFilter

Process category

Brief description

Computational demand

for typical tomography data

(low, medium, high)

Comment(s)

Reference(s)

Common alternative process(es)

filter

To suppress ring artefacts.

Medium

Operates on sinograms.

Numerical removal of ring artifacts in microtomography

RingRemovalWaveletfft
CcpiRingArtefactFilter

Parameters

Savu Configurator command

>>> disp -avv

-------------------------------------------------------------------------------------
 1) RavenFilter(savu.plugins.ring_removal.raven_filter)                              
  A plugin to remove ring artefacts                                                  
    1)                 uvalue : 20
    To define the shape of filter, e.g. bad=10, moderate=20, minor=50.
    2)            in_datasets : []
    Create a list of the dataset(s) to process.
    3)                 nvalue : 4
    To define the shape of filter.
    4)           out_datasets : []
    Create a list of the dataset(s) to create.
    5)                 vvalue : 2
    How many rows to be applied the filter.
    6)                  padFT : 20
    Padding for Fourier transform.
-------------------------------------------------------------------------------------

>>>

Item	Parameter name	Parameter format	Example(s)		Comment(s)
Item	Parameter name	Parameter format	Parameter value	Effect	Comment(s)
1	uvalue		10	To suppress prominent ring artefacts.	Over-aggressive *uvalue* can create new artefacts in the form of dark rings ('shadows').
			20	To suppress moderate ring artefacts.
			50	To suppress minor ring artefacts.
2	in_datasets
3	nvalue
4	out_datasets
5	vvalue
6	padFT

Usage

TBC.