The contribution referenced by Moti will help you to transform image
between cartesian and polar (generally multidimensional cylindrical)
coordinates. You need to use these transforms with ResampleImageFilter
to compute the transformation (see ITK Software Guide section 6.9.4
Resample Image Filter). Note, that to transform image from cartesian to
polar coordinates, you need to use PolarToCartesianTransform, because
ITK is using transforms to map points from output space to input space.
If you have any problems or questions, feel free to ask me.
<br><br>Unfortunately, these transforms do only polar mapping. If you
need to make log-polar mapping, i can assist you to write your own
transform.<br><br>Jakub<br><br><br><div><span class="gmail_quote">2007/1/22, Kuba Bican <<a href="mailto:kuba@smyslzivota.cz">kuba@smyslzivota.cz</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>The contribution referenced by Moti will help you to transform image between cartesian and polar (generally multidimensional cylindrical) coordinates. You need to use these transforms with ResampleImageFilter to compute the transformation (see ITK Software Guide section
6.9.4 Resample Image Filter). Note, that to transform image from cartesian to polar coordinates, you need to use PolarToCartesianTransform, because ITK is using transforms to map points from output space to input space. If you have any problems or questions, feel free to ask me.
<br><br>Unfortunately, these transforms do only polar mapping. If you need to make log-polar mapping, i can assist you to write your own transform.<br><br>Jakub<br><br><br><br><div><span class="gmail_quote">2007/1/21, Moti Freiman <
<a href="mailto:freiman@cs.huji.ac.il" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">freiman@cs.huji.ac.il</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><span class="e" id="q_1104937713c0d091_1">This link might interest you.
<br><a href="http://insight-journal.org/dspace/handle/1926/342" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://insight-journal.org/dspace/handle/1926/342</a><br>However I did not tested it by my self.
<br>Good luck,<br>Moti<br><br><div>
<span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>------------------------------<br><br>Message: 2<br>Date: Sun, 21 Jan 2007 02:27:44 +0000
<br>From: Ali - <<a href="mailto:saveez@hotmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">saveez@hotmail.com</a>><br>Subject: [Insight-users] Cartesian to polar filter in ITK<br>To: ITK <
<a href="mailto:insight-users@itk.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">insight-users@itk.org</a>
><br>Message-ID: <<a href="mailto:BAY122-W15CFD43CF235B3C8E0422ED1AF0@phx.gbl" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">BAY122-W15CFD43CF235B3C8E0422ED1AF0@phx.gbl</a>><br>Content-Type: text/plain; charset="iso-8859-1"
<br><br>Hi,I am trying to 'map' the pixels of images in Cartesian to polarand log-polar coordinates. By 'mapping' I mean the whole imageintensity is needed to be redistributed. For example image of a circle in Cartesian must be mapped to an image of a square in polarspace. This needs the implementation of an image-to-image
filter.Is such a filter already available in ITK? If not, which filter is the closest one to start with? (The Hough transform?)<span><br>_________________________________________________________________<br>Be one of the first to try Windows Live Mail.
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</a><br><br>-</blockquote></div><span><br>-- <br>__<br>Moti Freiman, Ph.D Student.<br>Medical Image Processing and Computer-Assisted Surgery Laboratory.<br>School of Computer Science and Engineering.<br>The Hebrew University of Jerusalem Givat Ram, Jerusalem 91904, Israel
<br>Phone: +(972)-2-658-5371 (laboratory)<br>WWW site: <a href="http://www.cs.huji.ac.il/%7Efreiman" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.cs.huji.ac.il/~freiman</a>
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