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eyes:logics:angularreconstitution [2017/06/12 13:21]
vzinch [Usage] 		eyes:logics:angularreconstitution [2017/06/12 15:29]
vzinch [Concept]
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 ====== AngularReconstitution ====== ====== AngularReconstitution ======
-This logic determines Euler angles for a given set of input images based on the Common ​line theorem. This is needed in order to correctly place images (2D projections) in 3D space to get the 3D conformation of the particle+This logic determines Euler angles for a given set of input images based on the common ​line theorem. This is needed in order to correctly place images (2D projections) in 3D space prior to reconstruction.
 ===== Usage ===== ===== Usage =====
 The input of this logic - class averages - should be of high quality with enough visible structural features. Choosing more class averages for this logic is not always a good idea, since similar views will result in worse angular assignment. So ideally class averages chosen should represent all possible distinct views, but without overlapping. If symmetry of the particle is known in advance, it is recommended to try running reconstitution both with and without applying symmetry restraints. The input of this logic - class averages - should be of high quality with enough visible structural features. Choosing more class averages for this logic is not always a good idea, since similar views will result in worse angular assignment. So ideally class averages chosen should represent all possible distinct views, but without overlapping. If symmetry of the particle is known in advance, it is recommended to try running reconstitution both with and without applying symmetry restraints.
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 ^ Parameters ​                ^ Description ​    ^ ^ Parameters ​                ^ Description ​    ^
 | Sinograms ​ | Gives options to read already generated sinograms or to write down sinograms for the images being processed | | Sinograms ​ | Gives options to read already generated sinograms or to write down sinograms for the images being processed |
-| Symmetry ​ | Symmetry of the complex studied ​(if known) |+| Symmetry ​ | Symmetry of the particle ​(if known) |
  
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 ^ Parameters ​                ^ Description ​    ^ ^ Parameters ​                ^ Description ​    ^
-| Symmetry ​ | Symmetry of the complex studied ​(if known) |+| Symmetry ​ | Symmetry of the particle ​(if known) |
  
 |< 100% 30% >| |< 100% 30% >|
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 ^ Parameters ​                ^ Description ​    ^ ^ Parameters ​                ^ Description ​    ^
-| Symmetry ​ | Symmetry of the complex studied ​(if known) |+| Symmetry ​ | Symmetry of the particle ​(if known) |
  
 |< 100% 30% >| |< 100% 30% >|
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 ^ Parameters ​                ^ Description ​    ^ ^ Parameters ​                ^ Description ​    ^
-| Symmetry ​ | Symmetry of the complex studied ​(if known) |+| Symmetry ​ | Symmetry of the particle ​(if known) |
  
 |< 100% 30% >| |< 100% 30% >|
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 ===== Concept ===== ===== Concept =====
  
-This logic is needed as an intermediate step to get 3D model from 2D images. In order to reconstruct the full model we need to know the relationship between the images (projections) we have - how they are located in 3D relative to each other. ​+This logic is needed as an intermediate step to get from 2D images ​to a 3D volume. In order to reconstruct the full volume ​we need to know the relationship between the images (projections) we have - how they are located in 3D relative to each other. ​
 In case any reference model for the particle is available, it can be used as '​anchor set' that would increase the precision of the output. ​ In case any reference model for the particle is available, it can be used as '​anchor set' that would increase the precision of the output. ​
-However, when no prior model is available for the particles of interest, determination of [[https://​en.wikipedia.org/​wiki/​Euler_angles|Euler angles]] should be done de novo. This logic does it based on [[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3334316|Common line theorem]].+However, when no prior model is available for the particles of interest, determination of [[https://​en.wikipedia.org/​wiki/​Euler_angles|Euler angles]] should be done de novo. This logic does it based on [[http://www.sciencedirect.com/science/article/pii/0304399187900787|Common line theorem]].