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<div>Brad,</div>
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<div>Eun Young (Regina) Kim is a graduate student of mine, and she would also be interested in this work.</div>
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<div>Hans</div>
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<div style="font-family:Calibri; font-size:15px"><font face="Arial" size="2"><span style="font-size:10pt">Hans J. Johnson, Ph.D.</span></font></div>
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<div style="font-family:Calibri; font-size:15px"><font face="Arial" size="2"><span style="font-size:10pt">Assistant Professor of Psychiatry</span></font></div>
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<span style="font-weight:bold">From: </span>Bradley Lowekamp <<a href="mailto:blowekamp@mail.nih.gov">blowekamp@mail.nih.gov</a>><br>
<span style="font-weight:bold">Date: </span>Fri, 10 Feb 2012 09:34:36 -0500<br>
<span style="font-weight:bold">To: </span>Dženan Zukić <<a href="mailto:dzenanz@gmail.com">dzenanz@gmail.com</a>><br>
<span style="font-weight:bold">Cc: </span>Insight-users <<a href="mailto:insight-users@itk.org">insight-users@itk.org</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [Insight-users] (off-list) Texture feature extraction<br>
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<div style="word-wrap:break-word">Hello Dženan,
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<div>It appears that you are trying to compute texture attributes for each pixel. This is very much not what the texture filters was originally designed for. It was designed to extract texture attributes from a segmented region.</div>
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<div>A couple months ago I prototyped a couple of filters to run this on a per-pixel basis, as your wiki example did. They worked to prove my point but I have not gotten the chance to return to this work. I am not guaranteeing the quality of the code...</div>
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<div>I could extract them into a external ITK module and place them on github. Perhaps there you could fork it and continue work or other wise collaborate on this work?</div>
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<div>Brad</div>
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<div>On Feb 10, 2012, at 9:18 AM, Dženan Zukić wrote:</div>
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<blockquote type="cite">After finding out how GLCM is used to extract features, I have created a new
<a href="http://www.itk.org/Wiki/ITK/Examples/Statistics/TextureFeatures">wiki example</a>. However, the execution speed has really disappointed me.
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<div>The example is single-threaded, but even so 90 seconds for a small image (64x64x12) is too much. I wanted to use texture features along some other features for segmentation purposes, but really slow execution of this texture extraction technique has me
reconsidering the usage of texture features.</div>
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<div>If anyone has an idea how to significantly reduce execution time (in addition to the obvious parallelization), please let me know.</div>
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<div>Regards,</div>
<div>Dženan</div>
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