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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Jerome,<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'>Thanks very much. I prefer to use vtkExtractVOI. However, as far as I know, it just extract one slice from the volume. What I need is to generate 2D contour lines on each slice. I checked my results and found that the visualization not only includes 2D contour lines but also 3D surface. While I just need to show 2D contour lines, not 3D surface.<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'>Could you tell me how to use vtkExtractVOI to make it, for example the parameters?<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'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Yang<o:p></o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span lang=ZH-CN style='font-size:10.0pt;font-family:宋体'>发件人</span></b><b><span style='font-size:10.0pt;font-family:宋体'>:</span></b><span style='font-size:10.0pt;font-family:宋体'> J<span lang=ZH-CN>é</span>rôme [mailto:jerome.velut@gmail.com] <br><b><span lang=ZH-CN>发送时间</span>:</b> 2011</span><span lang=ZH-CN style='font-size:10.0pt;font-family:"Batang","serif"'>년</span><span style='font-size:10.0pt;font-family:宋体'> 2</span><span lang=ZH-CN style='font-size:10.0pt;font-family:"Batang","serif"'>월</span><span style='font-size:10.0pt;font-family:宋体'> 24</span><span lang=ZH-CN style='font-size:10.0pt;font-family:"Batang","serif"'>일</span><span lang=ZH-CN style='font-size:10.0pt;font-family:宋体'> </span><span lang=ZH-CN style='font-size:10.0pt;font-family:"Batang","serif"'>목요일</span><span lang=ZH-CN style='font-size:10.0pt;font-family:宋体'> </span><span lang=ZH-CN style='font-size:10.0pt;font-family:"Batang","serif"'>오후</span><span style='font-size:10.0pt;font-family:宋体'> 5:07<br><b><span lang=ZH-CN>收件人</span>:</b> Xiaopeng Yang<br><b><span lang=ZH-CN>抄送</span>:</b> vtk<br><b><span lang=ZH-CN>主题</span>:</b> Re: [vtkusers] Generate contours around the segmented regions<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Hi Yang,<br><br>Indeed, the vtkContourFilter is doing exactly what you are asking for : it encloses the binary region inside a contour/surface. If you need to check the segmentation result on each slice, you can<br>- either use a vtkCutter after the vtkContourFilter, <br>vtkImporter2 -> vtkContourFilter -> vtkCutter <br>- or apply vtkContourFilter on an extracted slice of your input volume (eg. vtkExtractVOI).<br>vtkImporter2 -> vtkExtractVOI ->vtkContourFilter<br><br>(assumption made that vtkImporter2 is a sort of reader that imports your binary volume)<br><br>I don't know which method is the most efficient.<br><br>HTH,<br>Jerome<o:p></o:p></p><div><p class=MsoNormal>2011/2/24 Xiaopeng Yang <<a href="mailto:yxp233@postech.ac.kr">yxp233@postech.ac.kr</a>><o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hello VTK users,<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>After segmentation, I would like to generate contours around the segmented regions. And then visualize the contours over the original images. However, The generated “contours” look like 3D surface, not 2D contours (see the following image). Do you guys know what’s going on?<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>The code for generating contours:<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New"'>vtkContourFilter * contour = vtkContourFilter::New();</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New"'>contour->SetInput( vtkImporter2->GetOutput() );</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New"'>contour->SetValue(0, 128); // edges of a binary image with values 0,255</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><img border=0 width=253 height=264 id="_x0000_i1025" src="cid:image001.jpg@01CBD4D1.83807B80"><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks a lot,<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Yang<o:p></o:p></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br><br>Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br><br>Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br><br>Follow this link to subscribe/unsubscribe:<br><a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>