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Hi, Luis,<div><br></div><div>Thank you very much for your suggestions and I will check all those </div><div>factors. I will get back to you later.</div><div><br></div><div>Would you mind explain the difference between two optimizers: </div><div>itkRegularStepGradientDescentOptimizer</div><div>itkLBFGSBOptimizer<br></div><div><br></div><div>Thanks.</div><div><br></div><div>Sean</div><div><br><br>> Date: Fri, 10 Jul 2009 10:34:28 -0400<br>> From: luis.ibanez@kitware.com<br>> To: kevinseanlee@live.com<br>> CC: insight-users@itk.org<br>> Subject: Re: [Insight-users] problems on deformable registration 8<br>> <br>> <br>> <br>> Hi Sean,<br>> <br>> <br>> I'm wondering if this could be an aliasing effect<br>> between the BSpline grid and the grid of your image.<br>> <br>> <br>> But other suspects are:<br>> <br>> <br>> 1) and Interpolator issue in the border<br>> <br>> 2) an issue with the Optimizer<br>> <br>> <br>> <br>> Please do the following:<br>> <br>> <br>> Pass your images as input to<br>> <br>> DeformableRegistration15.cxx<br>> <br>> <br>> This program uses a different Optimizer.<br>> <br>> <br>> That may help to eliminate (2) above.<br>> <br>> <br>> If things still fail....<br>> <br>> <br>> Then we will ask you to send your images to us.<br>> So we can try to replicate the problem here.<br>> <br>> <br>> <br>> Thanks<br>> <br>> <br>> Luis<br>> <br>> <br>> <br>> --------------------<br>> Sean Lee wrote:<br>> > Hi, Luis,<br>> > <br>> > I found that another parameter could affect the result. If I <br>> > change gridSizeOnImage.Fill( 8 ) to <br>> > gridSizeOnImage.Fill( 10 ), it could result in the case with 59 slices <br>> > that used to run 34 iterations <br>> > only run one iteration.<br>> > <br>> > So it is really depending on the parameters you input.<br>> > <br>> > Thanks.<br>> > <br>> > Sean<br>> > <br>> > ------------------------------------------------------------------------<br>> > From: kevinseanlee@live.com<br>> > To: luis.ibanez@kitware.com<br>> > Date: Thu, 9 Jul 2009 12:53:39 -0500<br>> > CC: insight-users@itk.org<br>> > Subject: Re: [Insight-users] problems on deformable registration 8<br>> > <br>> > Hi, Luis,<br>> > <br>> > I am trying to provide more information and tested it with several other <br>> > numbers. Here is the results.<br>> > <br>> > 29, 56, 57, 58, 60 slices: 1 iteration with a bad result.<br>> > <br>> > 30 slices; 45 iterations with a good result. (of course, only half <br>> > volume is matched)<br>> > 59 slices; 34 iterations with a good result.<br>> > <br>> > Let me know what I can do for this issue.<br>> > <br>> > Thanks.<br>> > <br>> > Sean<br>> > <br></div><br /><hr />Windows Live™ SkyDrive™: Get 25 GB of free online storage. <a href='http://windowslive.com/online/skydrive?ocid=TXT_TAGLM_WL_SD_25GB_062009' target='_new'>Get it on your BlackBerry or iPhone.</a></body>
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