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<div class="moz-cite-prefix">Hi Denis,<br>
<br>
I enhanced the "vop fourier" command so that it provides a map
of phase values (-pi to pi) in addition to the Fourier transform
magnitude map that it already provides. Use<br>
<br>
vop fourier #0 phase true<br>
<br>
to get the phase map and the same command without the phase option
gives the magnitude map. This will be in tonight's daily builds.
Chimera only handles real-valued maps so the magnitudes and phases
need to be treated as two real-valued maps instead of a single
complex-valued map. I'm not sure what will be an effective way to
look at the phases. The phases can vary rapidly across the map
looking almost like noise. You could try a contour surface of the
FT magnitude colored to depict the phases on that surface (use
Surface Color tool) but it is not clear that it will tell you
anything.<br>
<br>
Tom<br>
<br>
<br>
</div>
<blockquote
cite="mid:EBB3BFBA-485B-4547-A7BF-8C342C703E66@univ-rennes1.fr"
type="cite">Dear all,
<div><br>
</div>
<div>I'm new to this list, so maybe this question has been raised
previously. Sorry if this is the case.</div>
<div><br>
</div>
<div>We are using the capability of Chimera to perform 3D Fourier
transforms, in order to analyse the effect of the missing wedge
on cryo-electron tomograms of microtubules. The "layer lines" of
the microtubules are nicely revealed in 3D, showing rings
corresponding to the amplitudes of their FFT. Yet, it would be
really nice to have the phases displayed, e.g. using colors.
Would that be possible to be implemented into the "vop Fourier"
command of Chimera?</div>
<div><br>
</div>
<div>Best,</div>
<div><br>
</div>
<div>Denis<br>
<div>
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<div style="word-wrap: break-word; -webkit-nbsp-mode:
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<div>___________________________<br>
Université de Rennes 1<br>
UMR 6290, équipe TIPs<br>
Campus de Beaulieu, Bât. 13<br>
35042 Rennes Cedex<br>
France<br>
<br>
</div>
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</span></span></div>
</div>
</blockquote>
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