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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The type of the modified time in ITK (m_MTime in Object) is itk::TimeStamp which in turn has a member:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">unsigned long m_ModifiedTime;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So this member can count in the range 0 till ulong max, which is about 4 x 10^9.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For my particular case this member overflows. I'm using the itk::VectorContainer and every time an item is inserted Modified() is called which increases the unsigned long value. In my case I am using minimal spanning trees and a simple
algorithm would have N^2 inserts with N the number of points of the tree, which is about 5000 for my application so 5000^2 = 25 x 10^6. Then I re-use the container in an iterative algorithm, which makes the problem worse. I can do about 85 iterations and then
it overflows. (This causes my filter to never update anymore, even if I explicitly call modified on it, or on the output, or call ResetPipeline().)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">A solution to this issue would be to use an unsigned long long for this variable. From itkIntTypes.h there is the typedef SizeValueType which may be appropriate.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Before I start preparing a patch: Does this seem like a good approach to you?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards, Marius<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Marius Staring, PhD<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Division of Image Processing (LKEB)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Department of Radiology<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Leiden University Medical Center<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">PO Box 9600, 2300 RC Leiden, The Netherlands<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">phone: +31 (0)71 526 2137, fax: +31 (0)71 524 8256<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">m.staring@lumc.nl<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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