<div dir="ltr"><div><font color="#000000" size="3" face="Times New Roman">
</font><p style="margin:0in 0in 0pt"><font color="#000000"><font face="Times New Roman">You can derive the
partial derivative of I_m with respect to T and then the gradient can be calculate
based on the theta_t <font size="3">
</font></font></font></p><font color="#000000"><font face="Times New Roman"><p style="margin:0in 0in 0pt">(integral over the
position).</p><p style="margin:0in 0in 0pt"><font size="3"></font></p></font><p style="margin:0in 0in 0pt"></p></font><p style="margin:0in 0in 0pt"> </p><font color="#000000" size="3" face="Times New Roman">
</font></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Apr 30, 2013 at 1:03 PM, alaamegawer <span dir="ltr"><<a href="mailto:alaamegawer@yahoo.com" target="_blank">alaamegawer@yahoo.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Great , so let me confirm that you mean the difference will come from<br>
Gradient part , so i'm asking that u mean in case of estimate tx first we<br>
calculate magnitude of the gradient in x dir or calculate gradient in x and<br>
y direction and get magnitude of it or calculate gradient then get the<br>
gradient value at this pos (initialize tx) .<br>
<br>
<br>
<br>
--<br>
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<div class="HOEnZb"><div class="h5">Sent from the ITK Insight Users mailing list archive at Nabble.com.<br>
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