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<div>Hi Simon,</div>
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<div id="AppleMailSignature">Thanks for the script. I was wondering if you could also share the csv or a dummy file? I'm unsure of what the second column contains. An offset distance to the rotation axis? Or the height? </div>
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<div id="AppleMailSignature">Which distance was known in your example? From the code it looks like the distance to the rotation axis?<br>
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Sepp</div>
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On 22 Nov 2016, at 08.01, Simon Rit <<a href="mailto:simon.rit@creatis.insa-lyon.fr">simon.rit@creatis.insa-lyon.fr</a>> wrote:<br>
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<div>Hi Sepp,<br>
I did do a calibration script on a micro CT platform. The idea was that I had a bb taken from 4 different view points at 4 different heights with a known distance. Their projected position was segmented beforehand on the projections and I tried to match the
projections by optimizing the calibration (which we see in before.pdf and after.pdf). I don't think it's a good script, e.g., because I tried to find 8 parameters when 7 are sufficient for my system (see, e.g.,
<a href="http://iopscience.iop.org/article/10.1088/0031-9155/45/11/327/meta;jsessionid=8DD0F1160098FBC65BB161A0257FBA75.c3.iopscience.cld.iop.org#">
this paper</a>). But this gives you a starting point to develop your own script which will hopefully be better. Please share if you do something from it!<br>
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Thanks,<br>
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Simon<br>
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<div class="gmail_quote">On Sat, Nov 19, 2016 at 8:51 PM, Sepp de Raedt <span dir="ltr">
<<a href="mailto:sdr@nrtxray.com" target="_blank">sdr@nrtxray.com</a>></span> wrote:<br>
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Hi RTK users,<br>
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I'm interested in reconstructing images acquired by a fluoroscopy system rotating around a knee phantom. Unfortunately, I've been unsuccessful so far. I recognize some of the phantom in the reconstructed image, but it contains double contours and the shape
is deformed.<br>
<br>
I think the issue might be incorrect geometry specification. I have images also including a phantom containing markers for which we know the coordinates, which should allow us to calibrate the system. On the wiki on image quality, I saw that some users had
developed scripts to do the calibration? Would someone be willing to share it?<br>
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Kind regards,<br>
Sepp<br>
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<div><after.pdf></div>
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<div><before.pdf></div>
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<div><calib.py></div>
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