[Insight-users] PasteImage Filter

Tue Oct 9 19:01:09 EDT 2012

And I just tried turning on the InPlace option on the pasteImageFilter and
it just failed with exception.

at

  inline void Set(TType & output, const TType & input) const

  { output = input; }

itkDefaultPixelAccessor.h

On Tue, Oct 9, 2012 at 5:59 PM, Kannan U V <kannanuv at cshl.edu> wrote:

> Hi Brad,
> I am using /usr/bin/c++ on a Mac as the compiler.
>
> retina:InsightToolkit-bin kannanuv$ /usr/bin/c++ -v
> Apple clang version 3.1 (tags/Apple/clang-318.0.58) (based on LLVM 3.1svn)
> Target: x86_64-apple-darwin11.3.0
> Thread model: posix
>
> I am using unsigned short 2D image.
>
> I re-build ITK with testing on. I did make; make install.
>
> retina:bin kannanuv$ /Applications/CMake\ 2.8-8.app/Contents/bin/ctest
>  -V -R itkImageAlgorithmCopyTest$
> UpdateCTestConfiguration  from :/usr/bin/DartConfiguration.tcl
> UpdateCTestConfiguration  from :/usr/bin/DartConfiguration.tcl
> Test project /usr/bin
> Cannot create directory /usr/bin/Testing/Temporary
> Cannot create log file: LastTest.log
> Constructing a list of tests
> Checking test dependency graph...
> Checking test dependency graph end
> No tests were found!!!
>
> but when I did
> retina:InsightToolkit-bin kannanuv$ find ./ -name
> "itkImageAlgorithmCopyTest*"
>
> .//Modules/Core/Common/test/CMakeFiles/ITKCommon2TestDriver.dir/itkImageAlgorithmCopyTest.cxx.o
>
> Am I doing something wrong with the TEST build?
>
> On Sun, Oct 7, 2012 at 4:15 PM, Bradley Lowekamp <blowekamp at mail.nih.gov>
> wrote:
> > Hello Kannann,
> >
> > My brief last reply didn't make it to the mailing list, so I'll explain
> further.
> >
> > Have you tried enabling the "InPlace" option?
> >
> > By default the PasteImageFilter ( or most any other filter ) will create
> a new image for the output. This adds additional overhead to the filter
> which is what you may be experiencing. Some filters are derived from the
> InPlaceImageFilter, and have an "InPlace" option. When this option is
> enabled the input image is reused as the output image, for the paste image
> filter this will reduce the over head by not having to copy the image.
> >
> > Recently with ITK 4.1 there has been an optimized ImageAgorithm::Copy
> method implemented. Under certain conditions the methods will be optimized
> to a memcpy. On my systems this resulted in over 100X performance in some
> cases over the ITK iterator methods. It would be good to know if your
> system is taking advantage of this. What is your compiler and what is the
> specific image type you are using? There is a test to evaluate this
> performance if you compile ITK with the test enabled it's called
> itkImageAlgorithmCopyTest and can be run by  "ctest -V -R
> itkImageAlgorithmCopyTest$"
> >
> > Thanks,
> > Brad
> >
> > On Oct 5, 2012, at 6:46 PM, Kannan U V <kannanuv at cshl.edu> wrote:
> >
> >> Thanks Bill. I built it in Release mode and still it is nearly a 1:2
> >> slower performance.
> >>
> >> For release, I am using the following gcc arguments.
> >>
> >> CMAKE_CXX_FLAGS_RELEASE -O3 -DNDEBUG
> >>
> >> Is there any thing else that I can do?
> >>
> >> On Fri, Oct 5, 2012 at 6:25 PM, Bill Lorensen <bill.lorensen at gmail.com>
> wrote:
> >>> Make sure you build your application in Release mode. If you are
> building
> >>> Debug, ITK can be 10 to 50 times slower.
> >>>
> >>> On Fri, Oct 5, 2012 at 6:00 PM, Kannan U V <kannanuv at cshl.edu> wrote:
> >>>>
> >>>> I was missing a update on the pasteFilter. Now that the paste image
> >>>> filter works. but the performance is 1:4 times worse than just copying
> >>>> pixels from tile to mosaic from the tiles. Is there a way I can
> >>>> improve this performance issue?
> >>>>
> >>>> On Thu, Sep 20, 2012 at 6:08 PM, Kannan U V <kannanuv at cshl.edu>
> wrote:
> >>>>> Hi All,
> >>>>> I am trying to use PasteImageFilter on a grid of image tiles. (These
> >>>>> are tiles with overlap) I know the position of the tiles and I want
> to
> >>>>> paste them on to the montage. I am using pasteImage filter. When I
> use
> >>>>> the following routine and I get only the last written time in the
> >>>>> mosaic image and all other regions are set to zero.
> >>>>>
> >>>>> Moreover if I don't do a set regions on the mosaicImage I get a write
> >>>>> error on image writer. I need help figuring out how it has to be run.
> >>>>>
> >>>>> for (int iY = 1; iY < 2; iY++) {
> >>>>>    for (int iX = 1; iX < 3; iX++) {
> >>>>>      cout << "Processing tile : (" << iX << "," << iY << ")" << endl;
> >>>>>      CreateConstantImage (tileImage, (iX + iY));
> >>>>>      pasteFilter->SetSourceImage(tileImage);
> >>>>>      pasteFilter->SetDestinationImage (mosaicImage);
> >>>>>
> >>>>> pasteFilter->SetSourceRegion(tileImage->GetLargestPossibleRegion());
> >>>>>
> >>>>>      mosaicIndex1[0] = iX * 812;
> >>>>>      mosaicIndex1[1] = iY * 812;
> >>>>>      pasteFilter->SetDestinationIndex(mosaicIndex1);
> >>>>>
> >>>>>      mosaicImage = pasteFilter->GetOutput();
> >>>>>      mosaicImage->SetRegions(region);
> >>>>>
> >>>>>  }
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> Thanks,
> >>>>> Kannan
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> Thanks,
> >>>> Kannan
> >>>> _____________________________________
> >>>> Powered by www.kitware.com
> >>>>
> >>>> Visit other Kitware open-source projects at
> >>>> http://www.kitware.com/opensource/opensource.html
> >>>>
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> >>>>
> >>>> Please keep messages on-topic and check the ITK FAQ at:
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> >>>>
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> >>>
> >>>
> >>>
> >>>
> >>> --
> >>> Unpaid intern in BillsBasement at noware dot com
> >>>
> >>
> >>
> >>
> >> --
> >> Thanks,
> >> Kannan
> >> _____________________________________
> >> 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.php
> >>
> >> 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
> >
>
>
>
> --
> Thanks,
> Kannan
>

-- 
Thanks,
Kannan
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