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<p>Hi Simon, <br>
</p>
<p>I am afraid I forgot to mention something in my last email. I
tried to use the lowmem option, as you suggested a while ago in
the list for the same problem, but I am afraid I am still getting
the same error.</p>
<p>kind regards,</p>
<p>Vincent<br>
</p>
<div class="moz-cite-prefix">On 11.02.20 17:36, Simon Rit wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAF0oig3--6NpM3Oe0BAhkdGBek-u1cKKp1_7w7LAX+AjCvx20g@mail.gmail.com">
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<div>Hi Vincent,</div>
<div>There is a way to do such a thing in rtkfdk with the
--divisions option, see code <a
href="https://github.com/SimonRit/RTK/blob/master/applications/rtkfdk/rtkfdk.cxx#L190-L196"
moz-do-not-send="true">here</a>. <br>
</div>
<div>I also don't really understand either what's going on in
your bottom reconstruction, it seems to be a geometric
problem. Have you checked an axial slice?</div>
<div>Simon</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Feb 11, 2020 at 4:21
PM vincent <<a href="mailto:vl@xris.eu"
moz-do-not-send="true">vl@xris.eu</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello
RTK community,<br>
<br>
I am afraid that my question might not be directly related to
the <br>
excellent implementation we are all using, but it might still
be <br>
interesting for some of you.<br>
<br>
I have a stack of 1500 projections of size 2048*2048. I
obviously can't <br>
reconstruct the full resolution volume on my graphics card, as
it is too <br>
big. So my solution was to split the sinogram into N parts,
for which <br>
each reconstructed volume would fit in my GPU memory and then
reassemble <br>
them. I did a test with a 700*820*900 sinogram, that I cut in
two parts <br>
of 700*410(+a small overlap)*900.<br>
<br>
While the reconstruction of the whole volume was acceptable, I
got a <br>
weird issue with the split ones: the one corresponding to the
top of the <br>
image is also ok, but the bottom one is very blurry. The
three images <br>
can be found at the following links:<br>
<br>
<a href="https://ibb.co/vLk9ZhQ" rel="noreferrer"
target="_blank" moz-do-not-send="true">https://ibb.co/vLk9ZhQ</a><br>
<a href="https://ibb.co/m4pm0LT" rel="noreferrer"
target="_blank" moz-do-not-send="true">https://ibb.co/m4pm0LT</a><br>
<a href="https://ibb.co/Jyf1yKM" rel="noreferrer"
target="_blank" moz-do-not-send="true">https://ibb.co/Jyf1yKM</a><br>
<br>
I used the same calibration parameters for the three
reconstruction. I <br>
visually checked the split sinograms and they looked fine.<br>
<br>
<br>
Any insight will be much appreciated !<br>
<br>
<br>
Thanks in advance,<br>
<br>
kindest regards,<br>
<br>
Vincent<br>
<br>
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</blockquote>
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</blockquote>
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