<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Dear All:</DIV>
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<DIV>I have a theoritical question about Chen Vese multiplse pahse leve set.</DIV>
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<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>
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<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>
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<DIV>How about if I only have three segments, let say segment (phi1<0 & phi2<0) will finally shrink to zeros.</DIV>
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<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>
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<DIV>((u-c22)^2-(u-c12)^2)H(phi2).</DIV>
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<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>
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<DIV>Thanks</DIV>
<DIV>Baoyun</DIV>
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