Excellent! For what it's worth. The rot,tilt,psi conventions are the same
as in XMIPP and FREALIGN.
HTH,
Sjors
> Dear David
>
> Thank you for directing me to the source code.
> I found the answer by looking at the definition of the functions
>
> Euler_angles2matrix()
> get2DFourierTransform()
> Projector::project()
>
> in euler.ccp and projector.ccp/.h and how these are used in (for
> example) ml_otpimizer.cpp.
> It seems that my interpretation of the RELION orientation parameter was
> correct.
>
> Stefano
>
>
> Le 2016-05-31 18:43, David Dynerman a écrit :
>> Dear Stefano,
>>
>> In euler.cpp in the Relion source root the function of interest looks
>> like Euler_angles2matrix()
>>
>> David
>>
>> Stefano Trapani <[log in to unmask]> writes:
>>
>>> Dear all
>>>
>>> I have been struggling (one more time) with the different definitions
>>> of
>>> the orientation parameters and Eulerian angles in different software.
>>>
>>> As far as RELION is concerned : what I understand (after some reading)
>>> is that the 2D reprojection of a 3D reconstruction according to a
>>> given
>>> set of orientation parameters can be calculated as stated in the
>>> attached equation.
>>> (I wrote all rotations explicitly as matrix products in order to avoid
>>> all ambiguities in the definition of rotation angles)
>>>
>>> Is this correct ?
>>>
>>> Thank you in advance for your help.
>>>
>>> --
>>> Stefano Trapani
>>>
>>> Maître de Conférences
>>> http://www.cbs.cnrs.fr/index.php/fr/apropos/annuaire/personnel?PERS=Stefano%20Trapani
>>> -------------------------------------
>>> Centre de Biochimie Structurale (CBS)
>>> 29 rue de Navacelles
>>> 34090 MONTPELLIER Cedex, France
>>>
>>> Tel : +33 (0)4 67 41 77 29
>>> Fax : +33 (0)4 67 41 79 13
>>> -------------------------------------
>>> Université de Montpellier
>>> CNRS UMR 5048
>>> INSERM UMR 1054
>>> -------------------------------------
>>>
>>> --
>>> This message has been scanned for viruses and
>>> dangerous content by MailScanner, and is
>>> believed to be clean.
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
>
--
Sjors Scheres
MRC Laboratory of Molecular Biology
Francis Crick Avenue, Cambridge Biomedical Campus
Cambridge CB2 0QH, U.K.
tel: +44 (0)1223 267061
http://www2.mrc-lmb.cam.ac.uk/groups/scheres
|