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oesteban / diffantom

A whole-brain diffusion phantom using phantomas
MIT License
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Preprocessing SFVFs #2

Closed oesteban closed 9 years ago

oesteban commented 9 years ago

In the meeting, I will get into detail of the pre-processing I use on the SFVFs (F_i). Basically, these are the steps:

  1. Non-local means filtering: to smooth the maps preserving borders. This works ok for F_1 but I'm concerned about F_2 and F_3.
  2. Sigmoid filter: the idea was to remove the long tails of large fractions (close to 1.0).
  3. Linear fitting of the smoothed maps to the original ones

Code for this is in this workflow: https://github.com/oesteban/diffantom/blob/master/diffantom/workflows.py#L92

This issue is derived from #1

oesteban commented 9 years ago

New processing is simpler and yields nicer results.