[Insight-users] Exception thrown while reading a cropped file !

[Juliette Deniau]

Hi Luis, 
Yes, In my code I reuse the same reader several times.
Now as you said I use  "reader->UpdateLargestPossibleRegion()" instead of   "reader->Update()" and the code is working fine.
Thank you Luis very much for your prompt reply and help.
Juliette


--- En date de : Lun 30.11.09, Luis Ibanez <luis.ibanez at kitware.com> a écrit :


De: Luis Ibanez <luis.ibanez at kitware.com>
Objet: Re: Exception thrown while reading a cropped file !
À: "Juliette Deniau" <juliette.deniau at yahoo.fr>
Cc: "insight" <insight-users at itk.org>
Date: Lundi 30 Novembre 2009, 13h33




Hi Juliette,




1) What File Format are you using ?


2) It looks that you are you reusing a reader class instance,
    that you have used before for reading a previous image in
    your program. Presumably the same reader that you used
    for loading the input image that you cropped.


3) It is ok to reuse a reader, but, when you do so, instead 
    of calling 


                         "reader->Update()" 


     you must call the method


                    "reader->UpdateLargestPossibleRegion()"




    in order to trigger the recomputation of the regions to be read.






  Please let us know how it goes.




    Thanks




         Luis



-----------------------------------------------------------------------------------------------------------

On Mon, Nov 30, 2009 at 8:08 AM, Juliette Deniau <juliette.deniau at yahoo.fr> wrote:






Hi, 
I have a reading problem of a cropped volume. The error I get is as follows: 
Exception thrown while reading the cropped file 
itk::ExceptionObject (013DFA88) 
Location: "void __thiscall itk::ImageFileReader<class itk::Image<unsigned char,3>,class itk::DefaultConvertPixelTraits<unsigned char> >::EnlargeOutputRequestedRegion(class itk::DataObject *)" 
File: c:\mytools\insight\insighttoolkit-3.10.0\code\io\itkImageFileReader.txx 
Line: 341 
Description: itk::ERROR: ImageFileReader(02616CA8): ImageIO returns IO region that does not fully contain the requested regionRequested region: ImageRegion (013DFC74) 
  Dimension: 3 
  Index: [13, 13, 13] 
  Size: [25, 25, 25] 
StreamableRegion region: ImageRegion (02616D8C) 
  Dimension: 3 
  Index: [0, 0, 0] 
  Size: [25, 25, 25] 
// end error 
The cropped volume is obtained by cropping the original volume using  Bounding Box Index [13, 13, 13]and Bounding Box size [25, 25, 25]of a segmented object contained in the original volume. 
The original volume is as following: 
inputSize= 64, 64, 64 
inputOrigin= 0, 0, 0 
inputSpacing= 1, 1, 1 
inputStart= 0, 0, 0 
I could not understand the above error especially I can view the cropped volume using  Volview without any problem! But I can’t read it ! 
Could anyone help me on this matter? 
Many thanks 
Juliette. 
 






























      
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