<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Hi Erik,</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">Lambert's explanation still holds. When a slice you are viewing cuts the surface at an angle close to 90°, you will see a thin line (left and right edges on your contour image). But when it cuts at an angle closer to 0°, you will see some thicker lines (top and bottom). When the slice cuts the surface at exactly 0°, you will see the whole surface.</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">Example: imaging viewing a slice of a surface representing a cube. If you look at some of the middle slices, you will see a thin empty square. But the first and last slice will be a filled square.</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">Another example, instead of a cube imagine surface of a staircase, and how slicing it along 2 of the 3 axes will produce "thick" edges.</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><div dir="ltr"><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"><font face="verdana, sans-serif">Dženan Zukić, PhD, Senior R&D Engineer, Kitware (Carrboro, N.C.)</font></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Aug 2, 2017 at 7:53 AM, E.J. Postema <span dir="ltr"><<a href="mailto:e.postema@erasmusmc.nl" target="_blank">e.postema@erasmusmc.nl</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d">Hi Lambert,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d">Sorry, I forgot to mention that the binary image is the original image and the contour is the result of the BinaryContourImageFilter on that image. So it is a
single slice from the stack.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d">Regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d">Erik<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Lambert Zijp [mailto:<a href="mailto:ljzijp@gmail.com" target="_blank">ljzijp@gmail.com</a>]
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<b>Sent:</b> woensdag 2 augustus 2017 13:44<br>
<b>To:</b> E.J. Postema<br>
<b>Cc:</b> <a href="mailto:community@itk.org" target="_blank">community@itk.org</a><br>
<b>Subject:</b> Re: [ITK] SimpleITK BinaryContour<u></u><u></u></span></p><div><div class="h5">
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Hi Erik,<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">It might well be that nothing is going wrong; especially <b>
binary</b> objects could show such behaviour when creating contours.<u></u><u></u></p>
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<p class="MsoNormal">The right image could be an end slice of your binary object. The left image can be explained by assuming that the object in the previous or the next slice is larger towards the bottom and much larger towards the top.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Greetings, Lambert<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Wed, Aug 2, 2017 at 11:41 AM, E.J. Postema <<a href="mailto:e.postema@erasmusmc.nl" target="_blank">e.postema@erasmusmc.nl</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hi everyone,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">So I am trying to create a contour from a binary 3d image. But the results seem a bit weird to me (see the images).</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">I am expecting a line of 1 (or maybe a few) pixels thick.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Anyone who knows what is going wrong?<br>
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Regards,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Erik
</span><u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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