[Insight-users] ImageFilter problems
Fleysher, Lazar
lazar.fleysher at mountsinai.org
Sat Dec 24 16:43:08 EST 2011
Hello Bill
could you ellaborate on this one about the CXX_FLAGS.
What do you mean by this and why it was not running before. Was it caused
by differences in CXX_FLAGS?
Thanks
Lazar
________________________________________
From: Bill Lorensen [bill.lorensen at gmail.com]
Sent: Saturday, December 24, 2011 12:35
To: Fleysher, Lazar
Cc: Insight-users at itk.org
Subject: Re: [Insight-users] ImageFilter problems
Ignore my last email. I'm an idiot. It works fine on linux.
Be sure to build your code with the same CXX_FLAGS that were used for
building ITK.
On Sat, Dec 24, 2011 at 12:14 PM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
> More info.
>
> I just ran it on my linux system (the other one was mingw).
>
> Now it is crashing. Maybe there is something funny with your .nii file.
>
> I'll keep looking.
>
> Also, I was just able to read it into Slicer which uses ITK...
>
> Hmmm
>
> On Sat, Dec 24, 2011 at 11:05 AM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
>> The code you sent has a typo in it, so I doubt that you ran it:
>> writer->SetInput( shFIlter->GetOutput() );
>> has to be
>> writer->SetInput( shFilter->GetOutput() );
>>
>> After I fixed the compile error, the code works for me, at least when
>> I use when I use the Laplacian. I ran it on your data file.
>>
>> How are you running the program. I find it unusual to run it as:
>>
>> TestFilter outputfile inputfile
>>
>> I would have expected
>> TestFilter inputfile outputfile
>>
>> but that is how the code is written.
>>
>> Bill
>>
>> On Sat, Dec 24, 2011 at 10:18 AM, Fleysher, Lazar
>> <lazar.fleysher at mountsinai.org> wrote:
>>> Hello Bill
>>>
>>> I am definitely missing something...
>>> Below is the code I use. There is a line with // which shows the Laplacian filter
>>> I tried to use with the same outcome....
>>>
>>> Thanks
>>>
>>> Lazar
>>> --------------------------------
>>> start code
>>> --------------------------------
>>> #include "itkArray.h"
>>> #include "itkVariableLengthVector.h"
>>> #include "itkImage.h"
>>> #include "itkImageRegionConstIterator.h"
>>> #include "itkImageFileReader.h"
>>> #include "itkImageFileWriter.h"
>>> #include "itkImageRegionIteratorWithIndex.h"
>>> #include "itkOptimalSharpeningImageFilter.h"
>>> #include "itkLaplacianSharpeningImageFilter.h"
>>>
>>>
>>> /////////////////////////////////////////////////////
>>> template <unsigned int ImageDimension,unsigned int NVectorComponents>
>>> int TestFilter(unsigned int argc, char *argv[])
>>> {
>>> std::cout << "testFilter executed" << std::endl;
>>>
>>> typedef float PixelType;
>>> typedef itk::Image<PixelType, ImageDimension> ImageType;
>>> typedef itk::ImageRegionIteratorWithIndex<ImageType> Iterator;
>>> typedef itk::ImageFileReader<ImageType> ImageFileReader;
>>> typedef itk::ImageFileWriter<ImageType> writertype;
>>>
>>> typename ImageType::Pointer averageimage = NULL;
>>>
>>> typename ImageFileReader::Pointer reader = ImageFileReader::New();
>>> reader->SetFileName(argv[2]); // load this image...
>>> reader->Update();
>>> averageimage=reader->GetOutput();
>>>
>>> typedef itk::OptimalSharpeningImageFilter<ImageType,ImageType > sharpeningFilter;
>>> // typedef itk::LaplacianSharpeningImageFilter<ImageType,ImageType > sharpeningFilter;
>>> typename sharpeningFilter::Pointer shFilter = sharpeningFilter::New();
>>>
>>> shFilter->SetInput( averageimage );
>>> shFilter->SetSValue(0.5);
>>> std::cout << "before" << std::endl;
>>> shFilter->Update();
>>> std::cout << "after" << std::endl;
>>>
>>> std::cout << " writing output ";
>>> {
>>> typename writertype::Pointer writer = writertype::New();
>>> writer->SetFileName(argv[1]); // save into this name....
>>> writer->SetInput( shFIlter->GetOutput() );
>>> writer->Update();
>>> }
>>>
>>> return 0;
>>> }
>>>
>>> /////////////////////////////////////////////////////
>>>
>>> int main(int argc, char * argv[])
>>> {
>>>
>>> TestFilter<3,1>(argc,argv);
>>> return 0;
>>> }
>>> ---------------------------------------------------
>>> end of code
>>> --------------------------------------------------
>>> ________________________________________
>>> From: Bill Lorensen [bill.lorensen at gmail.com]
>>> Sent: Saturday, December 24, 2011 07:52
>>> To: Fleysher, Lazar
>>> Cc: Insight-users at itk.org
>>> Subject: Re: [Insight-users] ImageFilter problems
>>>
>>> Please send me your code.
>>>
>>> On Sat, Dec 24, 2011 at 6:45 AM, Fleysher, Lazar
>>> <lazar.fleysher at mountsinai.org> wrote:
>>>> Hello Bill
>>>>
>>>> Yes I am modifying your code. The only difference between your code and mine
>>>> was the use of a pointer to access the filtered data... (was there anything else that I missed?)
>>>>
>>>> For laplacian example simply replace
>>>>
>>>> typedef itk::OptimalSharpeningImageFilter<ImageType,ImageType > sharpeningFilter;
>>>>
>>>> with
>>>>
>>>> typedef itk::LaplacianSharpeningImageFilter<ImageType,ImageType > sharpeningFilter;
>>>>
>>>>
>>>> Same result: seg fault on Update...
>>>>
>>>> Thanks
>>>>
>>>> Lazar
>>>>
>>>> ________________________________________
>>>> From: Bill Lorensen [bill.lorensen at gmail.com]
>>>> Sent: Friday, December 23, 2011 17:52
>>>> To: Fleysher, Lazar
>>>> Cc: Insight-users at itk.org
>>>> Subject: Re: [Insight-users] ImageFilter problems
>>>>
>>>> You are modifying my code, correct?
>>>>
>>>> Please send the code with the LaplacianSharpening.
>>>>
>>>>
>>>> On Fri, Dec 23, 2011 at 5:47 PM, Fleysher, Lazar
>>>> <lazar.fleysher at mountsinai.org> wrote:
>>>>> Dear Bill
>>>>>
>>>>> I did try catching am exception, but none is generated.
>>>>>
>>>>> The filter was there in the code. I tried to put another one (laplacian), but
>>>>> Result is the same: seg fault inside Update()....
>>>>>
>>>>> Lazar
>>>>>
>>>>> ________________________________________
>>>>> From: Bill Lorensen [bill.lorensen at gmail.com]
>>>>> Sent: Friday, December 23, 2011 17:21
>>>>> To: Fleysher, Lazar
>>>>> Cc: Insight-users at itk.org
>>>>> Subject: Re: [Insight-users] ImageFilter problems
>>>>>
>>>>> Where did you get the filter: OptimalSharpeningImageFilter?
>>>>>
>>>>> On Fri, Dec 23, 2011 at 4:41 PM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
>>>>>> Put a try/catch block around your code:
>>>>>> try
>>>>>> {
>>>>>> your code
>>>>>> catch (itk::ExceptionObject& e)
>>>>>> {
>>>>>> std::cerr << "Exception detected: " << e;
>>>>>> return EXIT_FAILURE;
>>>>>> }
>>>>>>
>>>>>> On Fri, Dec 23, 2011 at 4:23 PM, Fleysher, Lazar
>>>>>> <lazar.fleysher at mountsinai.org> wrote:
>>>>>>> Hello Bill
>>>>>>>
>>>>>>> Yes of course I have tried your version. As I said, I will not be
>>>>>>> able to use your approach in the final application, but for test
>>>>>>> purposes I did run your program with the same segmentation violation.
>>>>>>> (in my final application I will need the pointer to filtered image as I will
>>>>>>> do more things to it)
>>>>>>>
>>>>>>> ProcessObject::UpdateOutputData and calls inside it
>>>>>>> cause segmentation violation whether update() is called directly or not.
>>>>>>>
>>>>>>> Thank you very much for your help
>>>>>>>
>>>>>>> Lazar
>>>>>>> ________________________________________
>>>>>>> From: Bill Lorensen [bill.lorensen at gmail.com]
>>>>>>> Sent: Friday, December 23, 2011 16:09
>>>>>>> To: Fleysher, Lazar
>>>>>>> Cc: Insight-users at itk.org
>>>>>>> Subject: Re: [Insight-users] ImageFilter problems
>>>>>>>
>>>>>>> itk does not use intermediate storage. When you say image1 = image2 it
>>>>>>> is just assigning pointers.
>>>>>>>
>>>>>>> I'll try compiling and running your test program if I get a chance.
>>>>>>>
>>>>>>> Did you try my test program?
>>>>>>>
>>>>>>> On Fri, Dec 23, 2011 at 3:42 PM, Fleysher, Lazar
>>>>>>> <lazar.fleysher at mountsinai.org> wrote:
>>>>>>>> Dear Bill
>>>>>>>>
>>>>>>>> You suggest to feed the output of filter directly into the writer without
>>>>>>>> the use of an intermediate storage. While in my end application
>>>>>>>> this will not work, I have tried it here and the same thing happens.
>>>>>>>>
>>>>>>>> The segmentation violation is generated on filter->update() call...
>>>>>>>>
>>>>>>>> There is something wong with ITK or libc
>>>>>>>>
>>>>>>>> What do you think?
>>>>>>>>
>>>>>>>> Lazar
>>>>>>>>
>>>>>>>> ________________________________________
>>>>>>>> From: Bill Lorensen [bill.lorensen at gmail.com]
>>>>>>>> Sent: Friday, December 23, 2011 15:01
>>>>>>>> To: Fleysher, Lazar
>>>>>>>> Cc: Insight-users at itk.org
>>>>>>>> Subject: Re: [Insight-users] ImageFilter problems
>>>>>>>>
>>>>>>>> Try my attached version
>>>>>>>>
>>>>>>>> On Fri, Dec 23, 2011 at 2:48 PM, Fleysher, Lazar
>>>>>>>> <lazar.fleysher at mountsinai.org> wrote:
>>>>>>>>> Hello Bill
>>>>>>>>>
>>>>>>>>> Sorry for not being clear. Attached is the example which I am trying to work out.
>>>>>>>>>
>>>>>>>>> The way to execute is :
>>>>>>>>>
>>>>>>>>> TestFilter blah.nii.gz r16slice.nii.gz
>>>>>>>>>
>>>>>>>>> (unfortunately the image file is too large to be accepted by the mailing list)
>>>>>>>>>
>>>>>>>>> The function reads the file r16slice and applies filter to it and saves it on disk into blah.nii.gz
>>>>>>>>>
>>>>>>>>> If I do not exectute shFilter->Update(); than averageimage has no pixels just before write.
>>>>>>>>> If I do execute shFilter->Update(); then this causes segmentation violation.
>>>>>>>>> If I do not execute shFilter->Update(); and do not execute averageimage = shFilter->GetOutput();
>>>>>>>>> then the function works as copy and blah.nii.gz is identical to the r16slice.nii.gz....
>>>>>>>>>
>>>>>>>>> Thank you very much for your help
>>>>>>>>>
>>>>>>>>> Lazar
>>>>>>>>> ________________________________________
>>>>>>>>> From: Bill Lorensen [bill.lorensen at gmail.com]
>>>>>>>>> Sent: Friday, December 23, 2011 12:44
>>>>>>>>> To: Fleysher, Lazar
>>>>>>>>> Cc: Insight-users at itk.org
>>>>>>>>> Subject: Re: [Insight-users] ImageFilter problems
>>>>>>>>>
>>>>>>>>> itk is a demand driven pipelined system. Typically you set the input
>>>>>>>>> to the next filter to be the output of the previous filter. Setting
>>>>>>>>> the input/output chain just establishes the pipeline and does not
>>>>>>>>> execute it. When you do an Updtae() on the last filter, the pipeline
>>>>>>>>> executes.
>>>>>>>>>
>>>>>>>>> averageimage=shFilter->GetOutput() is OK, but in your first email you had said:
>>>>>>>>> shFilter->SetInput( averageimage );
>>>>>>>>> shFilter->SetSValue(0.5);
>>>>>>>>> // shFilter->Update();
>>>>>>>>> averageimage = shFilter->GetOutput();
>>>>>>>>>
>>>>>>>>> This modified averageimage was was the input to shFilter.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Please post a complete small, compilable example that fails. Including
>>>>>>>>> snippets in e-mails is too prone to error and misinterpretation.
>>>>>>>>>
>>>>>>>>> thanks,
>>>>>>>>>
>>>>>>>>> Bill
>>>>>>>>>
>>>>>>>>> On Fri, Dec 23, 2011 at 11:39 AM, Fleysher, Lazar
>>>>>>>>> <lazar.fleysher at mountsinai.org> wrote:
>>>>>>>>>> Dear Bill Lorensen
>>>>>>>>>>
>>>>>>>>>> averageimage is decleared as float 3D and then it is read from a (NIFTI) file....
>>>>>>>>>>
>>>>>>>>>> typename ImageFileReader::Pointer reader = ImageFileReader::New();
>>>>>>>>>> reader->SetFileName(argv[bigimage]);
>>>>>>>>>> reader->Update();
>>>>>>>>>> averageimage=reader->GetOutput();
>>>>>>>>>>
>>>>>>>>>> If I understood you correctly, I should run filter-> Update()
>>>>>>>>>> than to save the image do writer->SetInput(shFilter->GetOutput());
>>>>>>>>>> What is wrong with doing averageimage=shFilter->GetOutput()
>>>>>>>>>> followed by writer->SetInput(averageimage) ?
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Regardless, shFilter->Update() generates a segmentation violation.
>>>>>>>>>> If I comment out the filter part, the image gets saved in to a file
>>>>>>>>>> and everything seem to work correctly.
>>>>>>>>>>
>>>>>>>>>> So there is something strange with the filter ... but what?
>>>>>>>>>>
>>>>>>>>>> Here is the output of gdb. Definitely there is a problem with some threads...
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> [New Thread 2122320192 (LWP 15648)]
>>>>>>>>>> [New Thread 46912496267840 (LWP 15512)]
>>>>>>>>>> [New Thread 46913547483456 (LWP 15649)]
>>>>>>>>>> [New Thread 46914596063552 (LWP 15650)]
>>>>>>>>>> [Thread 2122320192 (LWP 15648) exited]
>>>>>>>>>> [Thread 46914596063552 (LWP 15650) exited]
>>>>>>>>>> [Thread 46913547483456 (LWP 15649) exited]
>>>>>>>>>>
>>>>>>>>>> Program received signal SIGSEGV, Segmentation fault.
>>>>>>>>>> [Switching to Thread 46912496267840 (LWP 15512)]
>>>>>>>>>> 0x0000003482c076e8 in pthread_join () from /lib64/libpthread.so.0
>>>>>>>>>>
>>>>>>>>>> Here we see that the filter created 4 threads, but could not join them correctly.
>>>>>>>>>> Furthermore:
>>>>>>>>>>
>>>>>>>>>> (gdb) where
>>>>>>>>>> #0 0x0000003482c076e8 in pthread_join () from /lib64/libpthread.so.0
>>>>>>>>>> #1 0x00000000007dd2b5 in itk::MultiThreader::WaitForSingleMethodThread (this=0x1a11160, threadHandle=3)
>>>>>>>>>> at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/src/itkMultiThreaderPThreads.cxx:210
>>>>>>>>>> #2 0x00000000007dd9af in itk::MultiThreader::SingleMethodExecute (this=0x1a11160)
>>>>>>>>>> at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/src/itkMultiThreader.cxx:332
>>>>>>>>>> #3 0x00000000007207fb in itk::ImageSource<itk::Image<double, 3u> >::GenerateData (this=0x19cf700)
>>>>>>>>>> at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/include/itkImageSource.hxx:275
>>>>>>>>>> #4 0x00000000007d36a6 in itk::ProcessObject::UpdateOutputData (this=0x19cf700)
>>>>>>>>>> at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/src/itkProcessObject.cxx:1500
>>>>>>>>>> #5 0x00000000007e18f8 in itk::DataObject::UpdateOutputData (this=0x19c3830) at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/src/itkDataObject.cxx:434
>>>>>>>>>> #6 0x0000000000705f43 in itk::ImageBase<3u>::UpdateOutputData (this=0x19c3830) at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/include/itkImageBase.hxx:285
>>>>>>>>>> #7 0x00000000007e1816 in itk::DataObject::Update (this=0x19c3830) at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/src/itkDataObject.cxx:359
>>>>>>>>>> #8 0x00000000007d3bc1 in itk::ProcessObject::Update (this=0x19cf700) at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/src/itkProcessObject.cxx:1096
>>>>>>>>>> #9 0x000000000077a82a in itk::OptimalSharpeningImageFilter<itk::Image<float, 3u>, itk::Image<float, 3u> >::GenerateData (this=0x19ce520)
>>>>>>>>>> at /work/home/xxx/ANTS/ANTS_SOURCE/ANTS/Examples/../Utilities/itkOptimalSharpeningImageFilter.hxx:142
>>>>>>>>>> #10 0x00000000007d36a6 in itk::ProcessObject::UpdateOutputData (this=0x19ce520)
>>>>>>>>>> at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/src/itkProcessObject.cxx:1500
>>>>>>>>>> #11 0x00000000007e18f8 in itk::DataObject::UpdateOutputData (this=0x19b52b0) at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/src/itkDataObject.cxx:434
>>>>>>>>>> #12 0x0000000000705f43 in itk::ImageBase<3u>::UpdateOutputData (this=0x19b52b0) at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/include/itkImageBase.hxx:285
>>>>>>>>>> #13 0x00000000007e1816 in itk::DataObject::Update (this=0x19b52b0) at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/src/itkDataObject.cxx:359
>>>>>>>>>> #14 0x00000000007d3bc1 in itk::ProcessObject::Update (this=0x19ce520) at /work/home/xxx/ANTS/ITK_SOURCE/ITK/Modules/Core/Common/src/itkProcessObject.cxx:1096
>>>>>>>>>> #15 0x000000000077d9ad in AverageImages1<3u, 1u> (argc=10, argv=0x7fffffffd7f8) at /work/home/xxx/ANTS/ANTS_SOURCE/ANTS/Examples/AverageImages.cxx:121
>>>>>>>>>> #16 0x0000000000633770 in main (argc=10, argv=0x7fffffffd7f8) at /work/home/xxx/ANTS/ANTS_SOURCE/ANTS/Examples/AverageImages.cxx:308
>>>>>>>>>>
>>>>>>>>>> Does this provide some information about what is happening????
>>>>>>>>>>
>>>>>>>>>> The system I am running on is CentOS5, I guess:
>>>>>>>>>>
>>>>>>>>>> cat /etc/redhat-release
>>>>>>>>>> Red Hat Enterprise Linux ES release 5
>>>>>>>>>>
>>>>>>>>>> cat /etc/redhat-release.CENTOS5.orig
>>>>>>>>>> CentOS release 5.4 (Final)
>>>>>>>>>>
>>>>>>>>>> yum gives me this:
>>>>>>>>>>
>>>>>>>>>> yum list|grep libc
>>>>>>>>>> glibc.i686 2.5-42 installed
>>>>>>>>>> glibc.x86_64 2.5-42 installed
>>>>>>>>>> glibc-common.x86_64 2.5-42 installed
>>>>>>>>>> glibc-devel.i386 2.5-42 installed
>>>>>>>>>> glibc-devel.x86_64 2.5-42 installed
>>>>>>>>>> glibc-headers.x86_64 2.5-42 installed
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Is this a problem with libc6?
>>>>>>>>>>
>>>>>>>>>> Thanks
>>>>>>>>>>
>>>>>>>>>> Lazar
>>>>>>>>>>
>>>>>>>>>> ________________________________________
>>>>>>>>>> From: Bill Lorensen [bill.lorensen at gmail.com]
>>>>>>>>>> Sent: Friday, December 23, 2011 08:37
>>>>>>>>>> To: Fleysher, Lazar
>>>>>>>>>> Cc: Insight-users at itk.org
>>>>>>>>>> Subject: Re: [Insight-users] ImageFilter problems
>>>>>>>>>>
>>>>>>>>>> For a filter to run, you must either explicitly call Update() on it,
>>>>>>>>>> or a filter down stream.
>>>>>>>>>>
>>>>>>>>>> Can you show the code that creates averageimage?
>>>>>>>>>>
>>>>>>>>>> Also, you should remove the statement:
>>>>>>>>>> averageimage = shFilter->GetOutput();
>>>>>>>>>>
>>>>>>>>>> It is already used as input to your filter. You are probably
>>>>>>>>>> introducing some sort of cycle in the pipeline.
>>>>>>>>>>
>>>>>>>>>> Try
>>>>>>>>>> writer->SetInput(shFilter->GetOutput());
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Fri, Dec 23, 2011 at 8:19 AM, Fleysher, Lazar
>>>>>>>>>> <lazar.fleysher at mountsinai.org> wrote:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Hello insight-users at itk.org.
>>>>>>>>>>>
>>>>>>>>>>> I am new to ITK and I am experiencing a strange problem with the image filters.
>>>>>>>>>>> So I was wondering if someone could shed some light on this.
>>>>>>>>>>>
>>>>>>>>>>> I have this code
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> typedef itk::OptimalSharpeningImageFilter<ImageType,ImageType > sharpeningFilter;
>>>>>>>>>>> typename sharpeningFilter::Pointer shFilter = sharpeningFilter::New();
>>>>>>>>>>> shFilter->SetInput( averageimage );
>>>>>>>>>>> shFilter->SetSValue(0.5);
>>>>>>>>>>> // shFilter->Update();
>>>>>>>>>>> averageimage = shFilter->GetOutput();
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> which should filter the averageimage.
>>>>>>>>>>>
>>>>>>>>>>> Unfortunately, when I run this code the resulting averageimage contains zero pixels.
>>>>>>>>>>> If I uncomment the "Update()" call (which I do not know if is needed) then
>>>>>>>>>>> the Update() generates a segmentation violation.
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I have ITK installed from sources using git clone git://itk.org/ITK.git from
>>>>>>>>>>> 2 days ago. I think it is version 4.1.
>>>>>>>>>>>
>>>>>>>>>>> Also, I have noticed that if I do not call Update() and try to save the image with
>>>>>>>>>>>
>>>>>>>>>>> typename writertype::Pointer writer = writertype::New();
>>>>>>>>>>> writer->SetFileName("aaa");
>>>>>>>>>>> writer->SetInput( averageimage );
>>>>>>>>>>> writer->Update();
>>>>>>>>>>>
>>>>>>>>>>> writer->Update() never returns. That is, it cannot write an empty image.
>>>>>>>>>>>
>>>>>>>>>>> Am I doing something wrong? What is going on?
>>>>>>>>>>>
>>>>>>>>>>> Thank you very much for your help
>>>>>>>>>>>
>>>>>>>>>>> Lazar
>>>>>>>>>>> _____________________________________
>>>>>>>>>>> Powered by www.kitware.com
>>>>>>>>>>>
>>>>>>>>>>> Visit other Kitware open-source projects at
>>>>>>>>>>> http://www.kitware.com/opensource/opensource.html
>>>>>>>>>>>
>>>>>>>>>>> Kitware offers ITK Training Courses, for more information visit:
>>>>>>>>>>> http://www.kitware.com/products/protraining.html
>>>>>>>>>>>
>>>>>>>>>>> Please keep messages on-topic and check the ITK FAQ at:
>>>>>>>>>>> http://www.itk.org/Wiki/ITK_FAQ
>>>>>>>>>>>
>>>>>>>>>>> Follow this link to subscribe/unsubscribe:
>>>>>>>>>>> http://www.itk.org/mailman/listinfo/insight-users
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Unpaid intern in BillsBasement at noware dot com
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Unpaid intern in BillsBasement at noware dot com
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Unpaid intern in BillsBasement at noware dot com
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Unpaid intern in BillsBasement at noware dot com
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Unpaid intern in BillsBasement at noware dot com
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Unpaid intern in BillsBasement at noware dot com
>>>>
>>>>
>>>>
>>>> --
>>>> Unpaid intern in BillsBasement at noware dot com
>>>
>>>
>>>
>>> --
>>> Unpaid intern in BillsBasement at noware dot com
>>
>>
>>
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