<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2900.2873" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>Dear insight users,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I encountered a strangeness with Mattes Mutual
Information and</FONT></DIV>
<DIV><FONT face=Arial size=2>BSpline Registration for a 2D imagepair according
to DeformableRegistrationExample8.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>First, I tried to register a artificial circle to a
square (circle white, background black) and it works fine.</FONT></DIV>
<DIV><FONT face=Arial size=2>Then, I try to do the same on the inverted images,
and it doesn't work at all.</FONT></DIV>
<DIV><FONT face=Arial size=2>It runs only for two iterations and doesn't
change anything on the circle.</FONT></DIV>
<DIV><FONT face=Arial size=2>If I use MeanSquaresImageToImageMetric, it works
fine again.</FONT></DIV>
<DIV><FONT face=Arial size=2>Does anybody have an idea, what could be the
problem???</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Best regards,</FONT></DIV>
<DIV><FONT face=Arial size=2>Markus</FONT> </DIV></BODY></HTML>