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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=ZH-CN link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#44546A'>Hi </span><span lang=EN-US>J</span><span lang=EN-US>oel</span><span lang=EN-US>,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Actually I have been thinking for a long time whether I should implement GPU or not. I am using DemonsRegistrationFilter to align multi-phase abdominal CT datasets. I have three different phases, so each time I need to perform two registrations which take more than 12 min (each 6 min). My customers really hate this long time computation. That is why I am trying to solve the problem as much as I can, but I need a right direction to take my effort on since I do not have much time. Thank you.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Xiaopeng</span><span lang=EN-US style='font-size:10.5pt;color:#44546A'><o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span lang=EN-US style='font-size:10.5pt;color:#44546A'><o:p> </o:p></span></a></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> Insight-users [mailto:insight-users-bounces@itk.org] <b>On Behalf Of </b>Jo?l Schaerer<br><b>Sent:</b> Friday, April 18, 2014 4:34 AM<br><b>To:</b> insight-users@itk.org<br><b>Subject:</b> Re: [ITK-users] GPU support situation for ITK<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-US>Hi Xiaopeng,<br><br>while it would probably be a fun project to work on, I would recommend reflecting a bit more on your problem before rushing into this.<br><br>What is your application? What registration algorithm are you using? Is every computation performed during these 6 minutes absolutely needed for your final application?<br><br>Sometimes thinking a bit about algorithms and the application at hand is even more beneficial than rolling out a super optimized implementation.<br><br>just my 2 cents,<br><br>joel<br><br>On 04/17/2014 04:46 PM, Xiaopeng Yang wrote:<o:p></o:p></span></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#44546A'>Then do you think it is worthwhile to give a shot? Right now the algorithm I used for non-rigid registration takes about 6 min on a desktop with Intel Core i7 3.2Ghz and 32G Ram. I would like to get the results in almost real time, so I am thinking about implementing the GPU.</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#44546A'> </span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#44546A'>Best regards,</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#44546A'>Xiaopeng</span><span lang=EN-US><o:p></o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Jim Miller [<a href="mailto:millerjv@gmail.com">mailto:millerjv@gmail.com</a>] <br><b>Sent:</b> Thursday, April 17, 2014 11:18 PM<br><b>To:</b> Xiaopeng Yang<br><b>Cc:</b> <a href="mailto:insight-users@itk.org"><insight-users@itk.org></a><br><b>Subject:</b> Re: [ITK-users] GPU support situation for ITK</span><span lang=EN-US><o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><div><p class=MsoNormal><span lang=EN-US>Implementing algorithms on the GPU is a skill. Also, it is tricky to get a GPU implementation to work across a large variety of GPUs. <br><br>Jim<o:p></o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US><br>On Apr 17, 2014, at 10:05 AM, "Xiaopeng Yang" <<a href="mailto:yxp233@postech.ac.kr">yxp233@postech.ac.kr</a>> wrote:<o:p></o:p></span></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#44546A'>Thank you Jim. I am still using ITK 3. I will try the latest version. By the way, is it difficult to implement the GPU to other algorithms? Can the GPU be implemented to all other algorithms?</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#44546A'> </span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#44546A'>Thanks,</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#44546A'>Xiaopeng</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#44546A'> </span><span lang=EN-US><o:p></o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Jim Miller [<a href="mailto:millerjv@gmail.com">mailto:millerjv@gmail.com</a>] <br><b>Sent:</b> Thursday, April 17, 2014 10:46 PM<br><b>To:</b> Xiaopeng Yang<br><b>Cc:</b> <<a href="mailto:insight-users@itk.org">insight-users@itk.org</a>><br><b>Subject:</b> Re: [ITK-users] GPU support situation for ITK</span><span lang=EN-US><o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><div><p class=MsoNormal><span lang=EN-US>A framework for GPU filters is in place in ITK. A limited number of algorithms have been implemented using the GPU to serve as models as to how other algorithms can be implemented. <br><br>Jim<o:p></o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US><br>On Apr 17, 2014, at 9:25 AM, "Xiaopeng Yang" <<a href="mailto:yxp233@postech.ac.kr">yxp233@postech.ac.kr</a>> wrote:<o:p></o:p></span></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt'>Dear Users,</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt'> </span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt'>I am wondering what is the current situation of GPU implementation in ITK. For example, for segmentation algorithms like region growing and level set methods, has GPU been implemented? How about the registration algorithms? Thank you very much.</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt'> </span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt'>Best regards,</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt'>Xiaopeng</span><span lang=EN-US><o:p></o:p></span></p></div></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:SimSun'>_____________________________________<br>Powered by <a href="http://www.kitware.com">www.kitware.com</a><br><br>Visit other Kitware open-source projects at<br><a href="http://www.kitware.com/opensource/opensource.html">http://www.kitware.com/opensource/opensource.html</a><br><br>Kitware offers ITK Training Courses, for more information visit:<br><a href="http://www.kitware.com/products/protraining.php">http://www.kitware.com/products/protraining.php</a><br><br>Please keep messages on-topic and check the ITK FAQ at:<br><a href="http://www.itk.org/Wiki/ITK_FAQ">http://www.itk.org/Wiki/ITK_FAQ</a><br><br>Follow this link to subscribe/unsubscribe:<br><a href="http://www.itk.org/mailman/listinfo/insight-users">http://www.itk.org/mailman/listinfo/insight-users</a></span><span lang=EN-US><o:p></o:p></span></p></div></blockquote></div></blockquote><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br><br><br><o:p></o:p></span></p><pre><span lang=EN-US>_____________________________________<o:p></o:p></span></pre><pre><span lang=EN-US>Powered by <a href="http://www.kitware.com">www.kitware.com</a><o:p></o:p></span></pre><pre><span lang=EN-US><o:p> </o:p></span></pre><pre><span lang=EN-US>Visit other Kitware open-source projects at<o:p></o:p></span></pre><pre><span lang=EN-US><a href="http://www.kitware.com/opensource/opensource.html">http://www.kitware.com/opensource/opensource.html</a><o:p></o:p></span></pre><pre><span lang=EN-US><o:p> </o:p></span></pre><pre><span lang=EN-US>Kitware offers ITK Training Courses, for more information visit:<o:p></o:p></span></pre><pre><span lang=EN-US><a href="http://www.kitware.com/products/protraining.php">http://www.kitware.com/products/protraining.php</a><o:p></o:p></span></pre><pre><span lang=EN-US><o:p> </o:p></span></pre><pre><span lang=EN-US>Please keep messages on-topic and check the ITK FAQ at:<o:p></o:p></span></pre><pre><span lang=EN-US><a href="http://www.itk.org/Wiki/ITK_FAQ">http://www.itk.org/Wiki/ITK_FAQ</a><o:p></o:p></span></pre><pre><span lang=EN-US><o:p> </o:p></span></pre><pre><span lang=EN-US>Follow this link to subscribe/unsubscribe:<o:p></o:p></span></pre><pre><span lang=EN-US><a href="http://www.itk.org/mailman/listinfo/insight-users">http://www.itk.org/mailman/listinfo/insight-users</a><o:p></o:p></span></pre></blockquote><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p></div></body></html>