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Do you have other things running while you're trying to load the large
data? Is it possible that you are running out of memory -- that you
can't allocate a large enough block of memory to hold the dataset? A
dataset of type short with the extents you listed would take up a
little over 500 MB of memory.<br>
<br>
- Amy<br>
<br>
Richard Layman wrote:
<blockquote
cite="midb79cf6510607200828r706ede69s5a64f5541cee930e@mail.gmail.com"
type="cite">Make sure the data extents are consistent with the data
size.<br>
Data size should be 769*769*456.<br>
<br>
<div><span class="gmail_quote">On 7/20/06, <b
class="gmail_sendername">Glauco Silva</b> <<a
href="mailto:glauco.silva@cenpra.gov.br">
glauco.silva@cenpra.gov.br</a>> wrote:</span>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div bgcolor="#ffffff">
<div><font face="Arial" size="2">Hi,</font></div>
<div><font face="Arial" size="2">I'm trying to use vtkImageImport
to import some data. </font></div>
<div><font face="Arial" size="2">If i import few data it's all
right, but if i import a lot of data, an error of read memory occurs.</font></div>
<div><font face="Arial" size="2">Is There some problem to import a
lot of data ?</font></div>
<div><font face="Arial" size="2">why does it import few data but
don't import a lot of data ?</font></div>
<div><font face="Arial" size="2">Thanks</font></div>
<div> </div>
<div><font face="Arial" size="2">platform : windows XP</font></div>
<div><font face="Arial" size="2">Dual Core AMD Opteron(tm)</font></div>
<div><font face="Arial" size="2">Processor 180</font></div>
<div><font face="Arial" size="2">2.41Ghz, 2.00 GB of RAM</font> </div>
<div> </div>
<div><font face="Arial" size="2">language : Python 2.3 , VTK 5</font></div>
<div> </div>
<div> </div>
<div> </div>
<div><font face="Arial" size="2">##part of code when occur error :</font></div>
<div> </div>
<div><font face="Arial" size="2">vtkImages = vtkImageImport()<br>
vtkImages.SetDataExtent(0,768,0,768,0,455)<br>
vtkImages.SetWholeExtent(0,768,0,768,0,455)<br>
vtkImages.SetDataScalarType(4)<br>
vtkImages.SetDataSpacing(0.38541666699999999, 0.38541666699999999, 1.5)<br>
vtkImages.SetDataOrigin((0,0,0))</font></div>
<div><font face="Arial" size="2"># image.data - > <read-write
buffer for 0x03C68E50, ptr 0x26AD0020, size 536739840 at 0x00B3A3C0></font></div>
<div><font face="Arial" size="2"># image.size = 268369920</font></div>
<div><font face="Arial" size="2"># image.itemsize = 2<br>
vtkImages.CopyImportVoidPointer(image.data, image.size*image.itemsize)<br>
vtkImages.GlobalWarningDisplayOff()<br>
vtkImages.Update()<br>
</font></div>
<div><font face="Arial" size="2">##</font></div>
<div><font face="Arial" size="2"> </font></div>
<div> </div>
<div><font face="Arial" size="2">
<div><font face="Arial" size="2">##part of code when don't occur
error:</font></div>
<div> </div>
<div><font face="Arial" size="2">vtkImages = vtkImageImport()<br>
vtkImages.SetDataExtent(0,768,0,768,0,25)<br>
vtkImages.SetWholeExtent(0,768,0,768,0,25)<br>
vtkImages.SetDataScalarType(4)<br>
vtkImages.SetDataSpacing(0.38541666699999999, 0.38541666699999999, 1.5)<br>
vtkImages.SetDataOrigin((0,0,0))</font></div>
<div><font face="Arial" size="2"># image.data - > <read-write
buffer for 0x03C685C0, ptr 0x05FA0020, size 28311552 at 0x00D13A40></font></div>
<div><font face="Arial" size="2"># image.size = 14155776</font></div>
<div><font face="Arial" size="2"># image.itemsize = 2<br>
vtkImages.CopyImportVoidPointer(image.data, image.size*image.itemsize)<br>
vtkImages.GlobalWarningDisplayOff()<br>
vtkImages.Update()<br>
</font></div>
<div><font face="Arial" size="2">##</font></div>
</font></div>
</div>
</div>
<br>
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