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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks for your reply. I can not find out any more from the code. If it is physical space, what unit is used?
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Default seems to be<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">m_MaxErrorToleranceThreshold(0.1),<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">m_MeanErrorToleranceThreshold(0.001),<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">so I guess this is not meters, but rather mm (?).
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<p class="MsoNormal"><b><span lang="SV" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Från:</span></b><span lang="SV" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Lowekamp, Bradley (NIH/NLM/LHC) [C] [mailto:blowekamp@mail.nih.gov]
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<b>Skickat:</b> den 31 maj 2016 16:03<br>
<b>Till:</b> Gustafsson Christian K <Christian.K.Gustafsson@skane.se><br>
<b>Kopia:</b> community@itk.org<br>
<b>Ämne:</b> Re: [ITK] InvertDisplacementFieldImageFilter in SimpleITK<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">My assumption would be that the error is in physical space and not pixels as this is standard ITK practice. While the documentation is rather sparse you can look at the source code to gain insight into these types of questions [1].<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Also note that there is the InverseDisplacementFieldImageFilter. I don’t recall the difference and if one is generally preferred of the other.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">HTH,<o:p></o:p></p>
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<p class="MsoNormal">Brad<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">[1] <a href="https://github.com/InsightSoftwareConsortium/ITK/blob/1257b0468c147ba2b1a65bae67169bdf35f4fa50/Modules/Filtering/DisplacementField/include/itkInvertDisplacementFieldImageFilter.hxx#L215-L248">https://github.com/InsightSoftwareConsortium/ITK/blob/1257b0468c147ba2b1a65bae67169bdf35f4fa50/Modules/Filtering/DisplacementField/include/itkInvertDisplacementFieldImageFilter.hxx#L215-L248</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On May 31, 2016, at 8:40 AM, Gustafsson Christian K <<a href="mailto:Christian.K.Gustafsson@skane.se">Christian.K.Gustafsson@skane.se</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hello!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">What is the unit of measurement that is used in the criterias MeanErrorToleranceThreshold and MaxErrorToleranceThreshold<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">/* Set/Get the mean stopping criterion */<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> itkSetMacro( MeanErrorToleranceThreshold, RealType );<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> itkGetConstMacro( MeanErrorToleranceThreshold, RealType );<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <span class="apple-converted-space"> </span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> /* Set/Get the max stopping criterion */<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> itkSetMacro( MaxErrorToleranceThreshold, RealType );<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> itkGetConstMacro( MaxErrorToleranceThreshold, RealType );<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">in InvertDisplacementFieldImageFilter in SimpleITK?<span class="apple-converted-space"> </span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Is it amount of pixels?<span class="apple-converted-space"> </span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Best regards<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">________________________________________<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Christian Gustafsson</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Medical Physicist, MRI, PhD candidate<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Department of Radiation Physics<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Klinikgatan 5<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Skåne University Hospital<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">SE 221 85 Lund<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">+46 46 177647<o:p></o:p></span></p>
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<p class="MsoNormal"><u><span lang="SV" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:blue"><a href="mailto:Christian.K.Gustafsson@skane.se">Christian.K.Gustafsson@skane.se</a></span></u><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif">_______________________________________________<br>
Community mailing list<br>
</span><a href="mailto:Community@itk.org"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:#954F72">Community@itk.org</span></a><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif"><br>
</span><a href="http://public.kitware.com/mailman/listinfo/community"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:#954F72">http://public.kitware.com/mailman/listinfo/community</span></a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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