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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-family:"Calibri","sans-serif";color:#1F497D'>Hi Yusuf ÖZBEK,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>Thank you for your help! Under your suggestion, I solved my problem.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>Xiaopeng Yang<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><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:SimSun'>发件人</span></b><b><span style='font-size:10.0pt;font-family:SimSun'>:</span></b><span style='font-size:10.0pt;font-family:SimSun'> Yusuf OEZBEK [mailto:nasil122002@yahoo.de] <br><b><span lang=ZH-CN>发送时间</span>:</b> 2010</span><span lang=ZH-CN style='font-size:10.0pt;font-family:"Batang","serif"'>년</span><span style='font-size:10.0pt;font-family:SimSun'> 12</span><span lang=ZH-CN style='font-size:10.0pt;font-family:"Batang","serif"'>월</span><span style='font-size:10.0pt;font-family:SimSun'> 16</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:SimSun'> </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:SimSun'> </span><span lang=ZH-CN style='font-size:10.0pt;font-family:"Batang","serif"'>오전</span><span style='font-size:10.0pt;font-family:SimSun'> 6:15<br><b><span lang=ZH-CN>收件人</span>:</b> ITK Mailinglist<br><b><span lang=ZH-CN>抄送</span>:</b> Xiaopeng Yang<br><b><span lang=ZH-CN>主题</span>:</b> RE: [Insight-users] 2D CT image visualization problem<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p><o:p> </o:p></p><p>Hello Yang,<o:p></o:p></p><p><o:p> </o:p></p><p><o:p> </o:p></p><p>I send you a example. Look at vtkLookupTable (SetTableRange()) for the change of threshold or Hounsfield units. <o:p></o:p></p><p><o:p> </o:p></p><p><o:p> </o:p></p><p>//Display 2D-CT-Data (Axial)<o:p></o:p></p><p><o:p> </o:p></p><p>this->displayImageAxial->show(); //FLTK Box<br>this->displayImageAxial->redraw();<o:p></o:p></p><p><o:p> </o:p></p><p style='margin-bottom:12.0pt'>vtkInteractorStyleTrackballCamera* modeAxial = vtkInteractorStyleTrackballCamera::New();<br><br>vtkRenderer* rendererAxial = vtkRenderer::New();<br><br>renderWindowAxial* renderWindowAxial = vtkRenderWindow::New();<br>renderWindowAxial->AddRenderer(rendererAxial);<br><br>displayImageAxial->SetRenderWindow(renderWindowAxial);<br>displayImageAxial->SetInteractorStyle(modeAxial);<br>displayImageAxial->Initialize();<br><br><br>vtkLookupTable* hueLut = vtkLookupTable::New();<br> hueLut->SetTableRange (-250,1200); // -250= L 1200= W (<a href="http://en.wikipedia.org/wiki/Hounsfield_scale" target="_blank">http://en.wikipedia.org/wiki/Hounsfield_scale</a>)<br>hueLut->SetSaturationRange (0, 0);<br>hueLut->SetHueRange (0, 0);<br>hueLut->SetValueRange (0, 2);<br>hueLut->Build(); //effective built<br><br>vtkImageMapToColors *colorsAxial = vtkImageMapToColors::New();<br>colorsAxial->SetInput(reader2D->GetOutput());<br>colorsAxial->SetLookupTable(hueLut);<br><br>vtkImageActor* actorAxial = vtkImageActor::New();<br>actorAxial->SetInput(colorsAxial->GetOutput());<br>actorAxial->SetOpacity(1.0);<br>actorAxial->SetDisplayExtent(0,reader2D->GetWidth()-1 , 0,reader2D->GetHeight()-1, numberOfFilesOnSelectedFolder/2,numberOfFilesOnSelectedFolder/2); //0,511, 0,511, 100, 100<br> <br><br>vtkCamera* cameraAxial = vtkCamera::New();<br>cameraAxial->SetViewUp(0, 0, -1);<br>cameraAxial->SetPosition(0, 1, 0);<br>cameraAxial->SetFocalPoint(0, 0, 0);<br>cameraAxial->ComputeViewPlaneNormal(); <br>cameraAxial->Roll(90);<br>cameraAxial->Azimuth(90);<br>cameraAxial->Roll(-90);<br><br> <br>rendererAxial->AddActor(actorAxial);<br>rendererAxial->SetActiveCamera(cameraAxial);<br>rendererAxial->ResetCamera();<br>cameraAxial->Dolly(1.0);<br>rendererAxial->ResetCameraClippingRange();<o:p></o:p></p><p><o:p> </o:p></p><div><p class=MsoNormal> <o:p></o:p></p></div><p class=MsoNormal>Mit freundlichen Grüßen<br>Yusuf ÖZBEK<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p><div><div class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><hr size=1 width="100%" align=center></span></div><p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Von:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Xiaopeng Yang <yxp233@postech.ac.kr><br><b>An:</b> vtkusers@vtk.org; insight-users@itk.org<br><b>Gesendet:</b> Mittwoch, den 15. Dezember 2010, 13:04:51 Uhr<br><b>Betreff:</b> [Insight-users] 2D CT image visualization problem</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><div><p class=MsoNormal>Hello everyone,<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>I applied VTKimageViewer2 to visualize 2D CT images. And I succeeded. Furthermore, I would like to only show the pixels within a given gray scale threshold interval. But I have no idea how to do it. I would appreciate any help.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Thank you very much,<o:p></o:p></p><p class=MsoNormal>Xiaopeng<o:p></o:p></p></div></div></div></div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p></div></body></html>