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List:       vtkusers
Subject:    [vtkusers] (no subject)
From:       "zhangzhijun" <zjzhang () ee ! cuhk ! edu ! hk>
Date:       2001-12-30 3:41:05
Message-ID: 000501c190e3$cf859a60$1223bd89 () ee ! cuhk ! edu ! hk
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Dear all:
   After I read a volume data using vtkImagereader then I use a
vtkImageviewer to
show it in a window. I see from the image content that my image beginning is
displayed
in the left top corner, but the data origin point
(-511*0.653595/2,-511*0.653595/2, -54)
seems in the lower left point. I don't know whether this is the conventiion
in the vtkimagereader.
Can anyone tell me the coordinate definition in the imagreader.

 reader->SetDataExtent(0,511,0,511,1,28);
  reader->SetDataSpacing(0.653595,0.653595,4.0);
  reader->SetDataOrigin(-511*0.653595/2,-511*0.653595/2, -54);
//  reader->SetFilePrefix("c:/vtk/vtk32/vtksrc/vtkdata/fullHead/headsq");
  reader->SetFilePrefix("D:/regdata/patient_001/ct/image_m/ct");
  reader->SetDataScalarTypeToShort();

regards,
zhang zhijun


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