<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello,<div><br></div><div>I am surprised about the large amount of interest in this type of filter.<br><div><br></div><div>Briefly comparing performance to the wiki example this is 6x faster single threaded, and it's multi-threaded so it can be like 100x with enough cores and it's streamable. </div><div><br></div><div>I have placed what I had hacked together into github:</div><div><br></div><div><a href="https://github.com/blowekamp/itkTextureAnalysis">https://github.com/blowekamp/itkTextureAnalysis</a></div><div><br></div><div>I hopefully will get the testing and documentation into a respectable state this week.</div><div><br></div><div>Please use github for code comments and pull request for contributions.</div><div><br></div><div>Brief TODO:</div><div><br></div><div>Write documentation to describe what the filters do.</div><div>Write example like tests.</div><div>Write tests to verify computation, and parameters.</div><div>Improve the GLCM texture to use a moving histogram style algorithm.</div><div><br></div><div>Enjoy,</div><div>Brad</div><div><br></div><div><br><div><div>On Feb 10, 2012, at 10:14 AM, Johnson, Hans J wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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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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<div style="word-wrap:break-word"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font:normal normal normal 12px/normal Helvetica">========================================================</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font:normal normal normal 12px/normal Helvetica">Bradley Lowekamp<span class="Apple-converted-space"> </span><span class="Apple-converted-space"> </span></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font:normal normal normal 12px/normal Helvetica">Medical Science and Computing for</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font:normal normal normal 12px/normal Helvetica">Office of High Performance Computing and Communications</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font:normal normal normal 12px/normal Helvetica">National Library of Medicine<span class="Apple-converted-space"> </span></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font:normal normal normal 12px/normal Helvetica"><a href="mailto:blowekamp@mail.nih.gov">blowekamp@mail.nih.gov</a></font></div>
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