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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">Dear David your point is interesting,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">But unfortunately if you have a quasi-flat surface with some locals maxima, the gradient
is around zero in a big surface of your domain.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">For my problem seems very interesting the tool proposed by Jean:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%"><a href="https://topology-tool-kit.github.io/"><span style="color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">https://topology-tool-kit.github.io/</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">The installation seems to be a bit tricky but I want install the software and try
how it can work.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">Responding to Mathieu:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">I need a tool that can run without my supervision and it can find the local maxima in an autonomous
way.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">As soon as possible I come back to you and share my experience.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">For the moment I really thank you for your suggestions.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">Best Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#376092;mso-style-textfill-fill-color:#376092;mso-style-textfill-fill-alpha:100.0%">Andrea<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></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"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> David E DeMarle [mailto:dave.demarle@kitware.com]
<br>
<b>Sent:</b> Monday, April 16, 2018 14:17<br>
<b>To:</b> Mathieu Westphal<br>
<b>Cc:</b> Caffagni, Andrea; paraview@public.kitware.com; Favre Jean<br>
<b>Subject:</b> Re: [Paraview] How find local maxima of a scalar field in a slice<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">How about using the gradient (filter or python calculator expression) to take the derivative and find the points of inflection. Combine that with the techniques Mathieu and Jean suggested. <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 Apr 16, 2018 7:53 AM, "Mathieu Westphal" <<a href="mailto:mathieu.westphal@kitware.com">mathieu.westphal@kitware.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Dear Andrea,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Both Jean's and my method will not work for your case. I'll admit that I missed the local part.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">The easiest way would be to do it visually with scalar coloring and use "Hover Points" or "Hover Cells" to find the exact element you are looking for.<o:p></o:p></p>
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<p class="MsoNormal">Best,<o:p></o:p></p>
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<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
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<p class="MsoNormal">Mathieu Westphal<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 Mon, Apr 16, 2018 at 1:25 PM, Caffagni, Andrea <<a href="mailto:Andrea.Caffagni@ferrari.com" target="_blank">Andrea.Caffagni@ferrari.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Dear Jean,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Thanks for your suggestions.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">If I have understood correctly, your method can works only in the case in which I have only a maxima like this case:</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"><a href="https://upload.wikimedia.org/wikipedia/commons/c/ce/Gaussian_2d.png" target="_blank">https://upload.wikimedia.org/wikipedia/commons/c/ce/Gaussian_2d.png</a></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">But if I have to find the local maxima in this case:</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"><a href="https://www.mathworks.com/matlabcentral/mlc-downloads/downloads/submissions/27178/versions/6/previews/html/psPeaksExample.html" target="_blank">https://www.mathworks.com/matlabcentral/mlc-downloads/downloads/submissions/27178/versions/6/previews/html/psPeaksExample.html</a></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">in which I have three different local max peaks, your method can works correctly?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Best regards,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Andrea</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Favre Jean [mailto:<a href="mailto:jfavre@cscs.ch" target="_blank">jfavre@cscs.ch</a>]
<br>
<b>Sent:</b> Monday, April 16, 2018 09:38<br>
<b>To:</b> Caffagni, Andrea; <a href="mailto:paraview@public.kitware.com" target="_blank">
paraview@public.kitware.com</a><br>
<b>Subject:</b> RE: How find local maxima of a scalar field in a slice</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">use the Edit->Find Data menu<br>
<br>
Select Points or Cells.<br>
Select the "from" object (your slice's name)</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Select the variable name<br>
Select "is max"<br>
Click on "Run Selection Query"</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">-----------------<br>
Jean/CSCS</span><o:p></o:p></p>
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