[IGSTK-Users] How to get the ImageSpatialObject from an ImageSpatialObjectRepresentation

[Vincent Gratsac]

Hi all,

First of all, thanks for the great effort of the IGSTK team to bring us 
this new release !

I did not receive any answer to my last mail about how to get the 
ImageSpatialObject from an ImageObjectRepresentation.

Did you understand my problem, and do you think that adding a 
RequestGetImageSpatialObject() method to the ImageObjectRepresentation 
class would be possible ?

Vincent

> Hi all,
> 
> I'm currently working on slicing of displayed objects by giving a picked 
> point.
> The NeedleBiopsy example is helpful to learn how to do that !
> Here is my problem : my software can display some ObjectRepresentations 
> for more than one SpatialObjects, but I'm not able to know to which 
> ImageSpatialObject an ImageSpatialObjectRepresentation is related.
> 
> This is a problem when we try to convert a physical point to image 
> indexes ( that's why I submitted the idea to add a 
> ResliceToPhysicalPoint method in the ImageSpatialObjectRepresentation 
> class).
> 
> This is also a problem if the transformation between one of the 
> ImageSpatialObjects and the View object differs from Identity. In this 
> case, I need to get this transformation and multiply its inverse to the 
> picked point's coordinates, in order to express the picked point's 
> coordinates in the ImageSpatialObject coordinate system. Next, I will 
> have to convert the physical point to image index.
> 
> To conclude, I found some cases in which getting the ImageSpatialObject 
> from an ImageSpatialObjectRepresentation is very useful. Is there a way 
> to do it , or would it be unsafe to add such a method ?
> 
> Vincent

-- 
Vincent Gratsac
----------------------------------------------------
Unité/Projet VisAGeS U746
INSERM/INRIA/CNRS/U. de Rennes I
IRISA
Campus de Beaulieu, 35042 Rennes Cedex, France

Ph:  +33 (0) 2 23 23 49 20/ Fax: +33/0 2 99 84 71 71
email: Vincent.Gratsac at irisa.fr
http://www.irisa.fr/visages/
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