Leginon

h1. FFT Maker

The FFT Maker calculates power spectrums of input images.

Required bindings:

<highlights>

<simplelist>

<member> Acquisition - (AcquisitionImagePublishEvent) -> FFT Maker</member>

</simplelist>

</highlights>

There are two FFT Maker nodes in MSI, Exposure FFT and Focus FFT. Both of these FFT Maker

nodes need to be bound with events from different acquisition nodes. Exposure FFT (with a hint

from its name) is bound to the Exposure (Acquisition) node. Likewise, Focus FFT is bound to

the Focus node (that has Acquisition node behavior embedded within it).

h2.  Settings

*  Calculate FFT and save to the database = when enabled, the input image will have

its FFT calculated and existence stored in the database

*  Mask radius "1" % of image width = this percentage refers to how much of the

center of the FFT (with the high intesity base frequency) will be masked out in order

to make the rest of the FFT features more visable on the computer screen.

*  Images in Database: Find images in this session with label "" = *Currently this

feature is not used.

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[[The EM node|< The EM node]] | [[Focuser|Focuser >]]

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