Dear Ahmed,<br>the parameters between brackets are usually optional. You are not forced to enter them. However, you should introduce a filename (with the corresponding path) for the outputImagefile, which is the result of the registration process, i.e., your movingImageFile transformed to ressemble the fixedImageFile.<br>
<br>You may want to have a look at the registration chapter in the ITK software guide to have further details.<br><br>Kind regards,<br>JON HAITZ<map name="SafeHtmlFilter_graphicsmedia-ik4"><area shape="rect" coords="0,0,211,75" href="http://www.ik4.es" target="_blank"><area shape="rect" coords="0,75,211,150" href="http://www.graphicsmedia.net/" target="_blank"></map><div class="gmail_extra">
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<br><br><div class="gmail_quote">On 5 December 2012 08:50, sidou_3D <span dir="ltr">&lt;<a href="mailto:draoua.ahmed@gmail.com" target="_blank">draoua.ahmed@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
hello,<br>
I started a project mapping images MRI to scan images.<br>
I want to test ImageRegistration1 in itk  examples ,but I found a problem<br>
with the following two parameters entering:<br>
    std::cerr &lt;&lt; &quot;outputImagefile [differenceImageAfter]&quot;;<br>
    std::cerr &lt;&lt; &quot;[differenceImageBefore]&quot; &lt;&lt; std::endl;<br>
<br>
I did not understand what I have to enter both.<br>
<br>
if you can help me please in my beginning, you know that the beginning is<br>
always difficult.<br>
and what you advise me to start the registration.<br>
thank you in advance,<br>
<br>
Ahmed.<br>
<br>
<br>
<br>
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