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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear Users,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I applied vtkContourFilter to generate 2D contour lines over a series of mask images. Then I used vtkContourWidget to initialize the contour lines so that I can edit these contour lines by dragging control points located in these lines. However, the initialized contour lines include so many points that it is very hard to edit the contours. My question is how to reduce the number of contour points dramatically?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Yang<o:p></o:p></p></div></body></html>