<br>Hi Christian,<br><br>You could plot the values of the metric with respect to the parameters<br>of a BSpline Transform.... but... the challenge is that a BSpline transform<br>typically has hundreds of parameters.<br><br>
For example a 10x10 grid in a a 2 image will have 200 parameters....<br><br>Therefore you will have a cost function that should be plotted <br>in 200-dimensional space...<br><br>The example in the Software Guide is for a 2D Translation transform,<br>
that conveniently only have two parameters, and therefore can be easily<br>plotted as a 2D surface in a 3D space.<br><br><br>You could take selected pairs of parameters out of the N from your<br>BSpline transform, and plot the metric for only that pair....<br>
<br>It may still be interesting, since it could show you how the modification<br>of a particular node in the grid will affect the overall value of the Metric.<br><br><br><br> Regards<br><br><br> Luis<br><br>
<br>-----------------------------------------------<br><div class="gmail_quote">On Fri, Jul 24, 2009 at 8:35 AM, c23562 <span dir="ltr"><<a href="mailto:c.popko@gmx.de">c.popko@gmx.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
Hi all,<br>
<br>
<br>
In ItkSoftwareGuide (page 418) is an example for plotting Mean Squares<br>
Metric. I would like to plot the metric values of Mattes Mutual Information.<br>
But the transform is not a translation but a BSplineTransform. Is it<br>
possible too? With the plot i hope to find better parameters for<br>
regularStepGradientDescentOptimizer.<br>
<br>
<br>
Best regards,<br>
Christian.<br>
--<br>
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