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<p class=MsoNormal><span lang=EN-GB>Hi,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Machine details: Windows XP, visual studio 2008,
64 bit platform, 64Gb Ram<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Image size: 1442 x 1566 x 1657 ( approx 7Gb
)</span><span lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Other libraries: Along with ITK, VTK and
VTK Edge is also used. VTK Edge is used for changing vtk image to itk image and
vice versa.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Problem:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>In ITK the OffsetValueType is long. Range of
long datatype: –2,147,483,648 to 2,147,483,647 <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>But the image m_OffsetTable values of type
OffsetValueType are : 1; 1442; 2258172; 3,741,791,004<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>In the above, it is clearly seen that the
image offset value exceeds the OffsetValueType range.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Correction attempts:<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span
lang=EN-GB><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span lang=EN-GB>I changed the OffsetValueType
to unsigned long to increase the range. Unsigned long range : </span>0 to
4,294,967,295. But<span lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>this gives problems on conversion back to
vtk. The vtkdataarray created has a variable maxID which is of VtkIDType.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>VtkIDType is of long long. The maxID
contains the value = -553,176,292. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Correlation between 3,741,791,004 and -553,176,292.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Decimal Hexa<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>3,741,791,003 DF07331B<o:p></o:p></span></p>
<p class=MsoNormal>-553,176,292 FFFFFFFF DF07331B <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-GB>So, the program crashes due to bad pointer
when it used vtkdata array details to draw histogram.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>I think the probelm here is assigning of
unsigned long to long long. I don’t want to change the <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Vtk data type to unsigned long, so in next
attempt i change the itk OffsetValueType to long long.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span
lang=EN-GB><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span lang=EN-GB>I changed the itk
OffsetValueType to long long, but this leads to change of lot of several other<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>variable type in different file. Specially
some of the basic image container variables like TElementIdentifier, TElement have
to be changed.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>For now I only can give these 2 variable,
but i am afraid more variable data types have to be changed in the future. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>I would be glad to have some help to solve
this problem.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Kana<o:p></o:p></span></p>
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