<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Hi Oscar,</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">if you want to copy part of the image, and have the rest be filled with zeroes, you should:</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><ol><li>create a new image</li><li>copy information from the source image<br></li><li>set regions using source's region</li><li>allocate(true)</li><li>use <a href="https://itk.org/Doxygen/html/classitk_1_1PasteImageFilter.html" target="_blank">PasteImageFilter</a> to copy a portion of source to the new image</li></ol><div>Does this answer your question?</div><div><br></div><div>Regards,</div><div>Dženan</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jul 18, 2016 at 3:01 PM, Oscar Cuadros Linares <span dir="ltr"><<a href="mailto:ocuadrosl@gmail.com" target="_blank">ocuadrosl@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi <span name="Dženan Zukić" style="font-size:12.8px">Dženan Zukić</span><span style="font-size:12.8px;white-space:nowrap"> </span><div><span style="font-size:12.8px;white-space:nowrap"><br></span></div><div><div><span style="font-size:12.8px;white-space:nowrap">Thank you for your reply.</span></div><div><span style="font-size:12.8px;white-space:nowrap">I know that a 3D input produces a 3D output. I will try to explain better my issue. </span></div><div><span style="font-size:12.8px;white-space:nowrap">I have a 3D image and I want to get to a ROI (200x200x100 size) from that image. </span></div><div><span style="font-size:12.8px;white-space:nowrap">But the output image has to keep the original information, especially the region size.</span></div><div><span style="font-size:12.8px;white-space:nowrap">(400x400x550 in my case). The problem is that the output image is 200x200x100 size</span></div><div><span style="font-size:12.8px;white-space:nowrap">and not 400x400x550 like the input image. </span></div><div><span style="font-size:12.8px;white-space:nowrap"><br></span></div><div><span style="font-size:12.8px;white-space:nowrap">Thank you so much.</span></div></div><div><span style="font-size:12.8px;white-space:nowrap">Oscar</span></div><div><span style="font-size:12.8px;white-space:nowrap"><br></span></div><div><span style="font-size:12.8px;white-space:nowrap"> </span></div></div><div class="gmail_extra"><div><div><br><div class="gmail_quote">On Sat, Jul 16, 2016 at 10:52 AM, Dženan Zukić <span dir="ltr"><<a href="mailto:dzenanz@gmail.com" target="_blank">dzenanz@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Hi Oscar,</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">the output dimension is the same: 3D input produces 3D output, 2D input produces 2D output etc. But the point of RoI filter is to get an image which is only a part of the input image, and in that respect the filter is working correctly. What did you expect to happen? If you want only part of the image be processed, set its RequestedRegion to something smaller than LargestPossibleRegion.</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Regards,</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Dženan</div></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div>On Fri, Jul 15, 2016 at 6:04 PM, Oscar Cuadros Linares <span dir="ltr"><<a href="mailto:ocuadrosl@gmail.com" target="_blank">ocuadrosl@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>Hi Guys<br>
<br>
I am trying to extract a region of interest (ROI) from a 3D tomography<br>
I am using the filter "itkRegionOfInterestImageFilter.h". The issue is<br>
that the filter changes the original size of the input image.<br>
According the documentation, the output image has the same<br>
dimension of the input image. But size of the output image<br>
is the size of the selected region (ROI).<br>
My code is based on this example:<br>
<a href="https://itk.org/Wiki/ITK/Examples/ImageProcessing/RegionOfInterestImageFilter" rel="noreferrer" target="_blank">https://itk.org/Wiki/ITK/Examples/ImageProcessing/RegionOfInterestImageFilter</a><br>
<br>
Thank you for your suggestions<br>
Oscar<br>
<br></div></div>
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</blockquote></div><br><br clear="all"><div><br></div></div></div><span><font color="#888888">-- <br><div data-smartmail="gmail_signature">Oscar Cuadros Linares<br>Computer Science</div>
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