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| 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 |
| Numerical removal of ring artifacts in microtomography | |
Parameters
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| Code Block | ||
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>>> disp -avv
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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.
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>>> |
Additional notes |
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For basic information on this process, please use the disp -av (or disp -avv or disp-v[v] <process index>) command in Savu Configurator (see above). The table below is intended to provide some additional notes on a number of selected topics:
| Item | Parameter name | Parameter format | Example(s) | Comment(s) | |||
|---|---|---|---|---|---|---|---|
| Parameter value | Effect | ||||||
| 1 | uvalue | 10 | To suppress prominent ring artefacts. | Over-aggressive uvalue can create newartefacts | 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 | ||||||
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