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Question: How does MDF handle data in spatial frequency domain? (compressed sensing?) #89

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Neumann-A opened this issue Aug 25, 2017 · 4 comments

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@Neumann-A
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So has far as I know, compressed sensing (or sparse reco; I always mix those up since I am not a reco guy) does a spatial fft of the data in frequency domain (due to the spatial patterns of the system matrix in a single frequency domain this is possible).
Currently I dont see any way to map that data to an MDF file. Did I miss something?

@tknopp
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tknopp commented Aug 25, 2017

This is not possible at the moment. In principle this could be easily added but at this time point I don't want to put energy into this. @AvGladiss is interested I know. The current layout allows to introduce a new processing flag and then the Ndimension will be different. However, one has to specify several things: compression basis (FFT is not good, people use DCT or even other stuff), The number of dropped coefficients (one will usually compress), and so on.

@hofmannmartin
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I think our current storage layout will be able to handle global threshold compressions only, since we store NxFrequencies. Is this an issue?

@tknopp
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tknopp commented Aug 25, 2017

Don't thinks so. It is a limitation, yes, but no big deal actually.

@tknopp
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tknopp commented Aug 25, 2017

moving to post v2.0 milestone

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