<br><br>Hi Xian,<br><br>If you need sub-pixel locations for the points of the fibers,<br>yes, it makes sense to use ContinuousIndex instead of <br>Indexes for representing the location of fibers centers.<br><br>That said, it may be preferable to use itk::Point<> since<br>
that will take into account also the pixel spacing, image <br>origin, and image orientation, and you will be able to<br>do things like overlapping a visualization of the fibers<br>with the original image.<br><br>A) If you need to convert Index to ContinousIndex you <br>
can use the method:<br><br> Constructor<br><br> IndexType index;<br> ContinuousIndexType cindex( index );<br><br>B) In order to convert Continuous index to Index you<br> can use the method CopyWithRound()<br>
<br> index.CopyWithRound( continousIndex )<br><br>C) In order to convert an index into a physical point<br> and back you can use the image methods<br><br> TransformIndexToPhysicalPoint( index, point );<br> TransformPhysicalPointToIndex(point, index );<br>
<br><br><br> Regards,<br><br><br><br> Luis<br><br><br><br>----------------------------------------------------------------------------------------------<br><div class="gmail_quote">On Sun, Jun 28, 2009 at 2:42 PM, Xiang Hao <span dir="ltr"><<a href="mailto:haoxiang@yahoo.cn">haoxiang@yahoo.cn</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;">Hi,<br><br>I am trying to write a tractography program. <br>Now I use discrete index:<br><br>
Dimension =3;<br clear="all">typedef int OutputPixelType;<br>typedef itk::Image< OutputPixelType, Dimension > OutputImageType;<br>
OutputImageType::IndexType pixelIndex;<br><br>So
now the pixelIndex is discrete index and I want to change it to
continuous index. I know there is an ContinuousIndex class in ITK. I
wonder whether I should use this class and how to use it in order to
change the index to continuous index.<br>
<br><br>-- <br>Cheers,<br><font color="#888888">Xiang<br>
</font><br clear="all"><br>-- <br>Cheers,<br><font color="#888888">Xiang<br>
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