<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Hi, Wanlin:</DIV>
<DIV> </DIV>
<DIV>I looked your paper at google book. However, I am still not clear.</DIV>
<DIV> </DIV>
<DIV>I would like to following Chan vese multiphase scheme. My object may contain 4 segments or 3 segments. How to make the method having the flexibiltiy to deal with 2-4 segments? Does you method provide the flexibility to deal with varies number of phases?</DIV>
<DIV> </DIV>
<DIV>Also what numerical scheme are you used? Can you send me your paper?</DIV>
<DIV> </DIV>
<DIV>Thanks</DIV>
<DIV> </DIV>
<DIV>Baoyun<BR>--- On <B>Thu, 3/25/10, wlzhu <I><wanlinzhu@gmail.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid"><BR>From: wlzhu <wanlinzhu@gmail.com><BR>Subject: Re: [Insight-users] muliple pahse Chan Vese, one partition totally shrink<BR>To: "Baoyun Li" <baoyun_li123@yahoo.com><BR>Cc: insight-users@itk.org<BR>Date: Thursday, March 25, 2010, 2:55 PM<BR><BR>
<DIV id=yiv167241012>Hi, baoyun, <BR> You may have a look at this paper. <BR><BR><A href="http://www.springerlink.com/content/q0186ju536h0gw6p/" target=_blank rel=nofollow>http://www.springerlink.com/content/q0186ju536h0gw6p/</A><BR><BR>which proposed 3-phase level set brain tissue segmentation.<BR><BR><BR><BR>
<DIV class=gmail_quote>On Thu, Mar 25, 2010 at 8:52 AM, Baoyun Li <SPAN dir=ltr><<A href="http://us.mc1110.mail.yahoo.com/mc/compose?to=baoyun_li123@yahoo.com" target=_blank rel=nofollow ymailto="mailto:baoyun_li123@yahoo.com">baoyun_li123@yahoo.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE class=gmail_quote style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
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<DIV>Dear All:</DIV>
<DIV> </DIV>
<DIV>I have a theoritical question about Chen Vese multiplse pahse leve set.</DIV>
<DIV> </DIV>
<DIV>I have two level set and the two level set can segment the image to 4 segments, then I can calculate the mean for each segments as following</DIV>
<DIV> </DIV><FONT size=2>
<DIV>%c11 = mean (phi1>0 & phi2>0)</DIV>
<DIV>%c12 = mean (phi1>0 & phi2<0)</DIV>
<DIV>%c21 = mean (phi1<0 & phi2>0)</DIV>
<DIV>%c22 = mean (phi1<0 & phi2<0)</DIV></FONT>
<DIV> </DIV>
<DIV>How about if I only have three segments, let say segment (phi1<0 & phi2<0) will finally shrink to zeros.</DIV>
<DIV> </DIV>
<DIV>Then how to I calcuate c22, and also what value of c22 I should use to update leve set equation as shown below:</DIV>
<DIV> </DIV>
<DIV>((u-c22)^2-(u-c12)^2)H(phi2).</DIV>
<DIV> </DIV>
<DIV>I saw somebody use the mininum number of the machine to replace c22, but I could not imagine what will happen and why to do that.</DIV>
<DIV> </DIV>
<DIV>Thanks</DIV>
<DIV>Baoyun</DIV>
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