[Insight-users] Initial Level set as a PNG file ??
Jayant Chauhan
gripened at hotmail.com
Sat, 24 Apr 2004 14:13:54 +0530
<html><div style='background-color:'><DIV class=RTE>Hey Fellas,</DIV>
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<DIV class=RTE>1)Since PNG format allows only unsigned char and unsigned short, does that mean I cannot specify my init level set as a png file ?? Because I do create my init level set from matlab by specifying sign changes at the boundaries, but finally the image is rescaled between 0 and 255 before being written, so could that be a problem with my init level set expanding in both directions ??</DIV>
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<DIV class=RTE>2)Or is it because of NARROW BAND effect ?? As in, the expansion takes place both ways ??</DIV>
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<DIV class=RTE>3) The ReverseExpansionDirection concept seems to be confusing me. Could you please let me know as to what does it exactly do ? When I do gacfilter->SetReverseExpansionDirection(false)</DIV>
<DIV class=RTE>I get nothing after 100-1000 iterations.</DIV>
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<DIV class=RTE>4) How is the fact that I specify my init level set as a contour (ie, other than the boundary, all pixels have negative value) different from specifying the level set as a region (asin, inner region positive and outer negative) ? How will the outputs of GACfilter vary with tis ??</DIV>
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<DIV class=RTE>with regards</DIV>
<DIV class=RTE>Jayant Chauhan</DIV></div><br clear=all><hr>Let your desktop sizzle! Get the hottest wallpapers. <a href="http://g.msn.com/8HMAENIN/2755??PS=">Get the hottest wallpapers.</a> Right here at MSN Entertainment!</html>