.. index::
  pair: release announcement; v4.3.0

What's New in Release 4.3.0
===========================

Description
-----------
  A summary of what is new in the 4.3.0 feature release.

Summary
-------

The 4.3.0 release is a major milestone that marks the hard work on many outstanding community members.

We are excited to announce that experimental DICOM image reading is available
via the DCMTK library as a backend in addition to the GDCM library.  By
default, DCMTK ImageIO support is not enabled.  To try DCMTK ImageIO support,
turn the CMake option Module_ITKIODCMTK ON.  For Unix platforms, the supporting
DCMTK library will automatically be built as a CMake ExternalProject.  On
Windows, the DCMTK library must be built independently of the ITK build system.
Then, specify the location to the external build after setting the CMake
option ITK_USE_SYSTEM_DCMTK ON.

WrapITK has undergone extensive improvements and bug fixes.  The status of WrapITK on various platforms can be found on the following Wiki page:

  http://www.itk.org/Wiki/ITK/WrapITK_Status

A number of registration-related feature enhancements were added.  The image registration methods have been updated to accommodate multiple image metrics within a single optimization scheme.  This permits, for example, registration of a T1/T2 fixed image pair with a T1/T2 moving image pair using a single metric for both T1 and T2 gradients or even using two different metrics.  New exponential transforms are available along with automated B-Spline transform scale estimation.  A new physics-based non-rigid registration class is also available.

Updated third-party library versions include:
* NrrdIO from Teem 1.11,
* libtiff 4.03,
* FFTW 3.3.2

A large number of important bugs were crushed, including fixes to the ObjectFactoryBase, Patch-Based Denoising improvements, support for a system libtiff, mesh processing, and FFTW use.

Support for itk::VectorImage’s was added to many algorithms, and a single templated Adaptor class can now be applied without modification to both itk::VectorImage’s and itk::Image’s of itk::Vector’s, itk::RGBPixel’s, etc.

An extensive amount of code cruft was removed and coding style was made more consistent; ITK gets more stylish and classy with every release!

Performance optimizations were achieved by removing GetInput/GetOutput calls within filter inner loops, improving memory alignment, memory access pattern optimizations, and parallelization through threading.

NOTE:  As previously scheduled, Visual Studio 2005 will no longer be supported after this release.


List of commits
---------------

Changes since v4.2.0::

  Andreas Schuh (1):
        DOC: Modify BSplineDeformableTransform comments.

  Andriy Kot (1):
        ENH: Main filter for A2D2 PBNRR.

  Arnaud Gelas (10):
        PERF: couple of performance improvements useful for mesh processing
        PERF: Minor performance improvement in KernelTransform
        BUG: Fix errors on MS Visual
        COMP: missing includes in itkVectorImageToImageMetricTraitsv4.h
        ENH: Add tests for iterator indices
        COMP: fix doxgen warnings
        COMP: fix warning about uninitialized value
        COMP: Fix compilation error (missing include).
        COMP: fix clang warning about unused parameter
        STYLE: Make CopyMeshToMesh a function just like the other Copy Container ones.

  Baohua Wu (2):
        BUG: fixed a few bugs related to GPU Demons
        ENH: added suport for buffered region in GPU image

  Bill Lorensen (11):
        COMP: Macro definition of None in X11 breaks enum
        BUG: ThirdParty should not depend on ITK
        ENH: Utility to find modules needed by an ITK app
        COMP: Incorrect test signature
        BUG: GDCMImageIO ignores ImagePositionPatient
        STYLE: Fix according to KWstyle
        BUG: DCMTKImageIOFactory has wrong class name
        COMP: Remove DCMTK from default modules
        COMP: add set methods for member variables where missing.
        BUG: Cannot read a 2 channel (gray, alpha) png file correctly
        COMP: Revert recent change to iterator that fails to compile

  Brad King (11):
        MetaIO: Avoid NULL dereference in MetaOutput::GetUsername
        KWSys: Fix SystemInformation declaration order
        ENH: Allow ITK modules to export custom information
        ENH: ExternalData: Fix typo in unknown action error message
        COMP: Make module header tests depend on module libraries
        COMP: Make module header tests depend on module libraries
        STYLE: Replace write_file() with file(WRITE) and file(APPEND)
        STYLE: Replace make_directory() with file(MAKE_DIRECTORY)
        STYLE: Replace install_(files|programs|targets) with install command
        STYLE: Replace remove() with list(REMOVE_ITEM)
        STYLE: Remove unsed vxl source directory

  Bradley Lowekamp (46):
        COMP: fixing error when instatiated with image of double
        PERF: remove per sample allocation, use per-thread structure
        BUG: prevent static initialization fiasco during factory registration
        PERF: Avoid memcpy call per component for Nift
        BUG: Correct for divide by zero when first bin has zero frequency
        PERF: add alignment data attribute to per-thread structure
        BUG: fix writing a corrupt meta image header from unknow metadata
        PERF: remove per sample allocation, use per-thread structure
        BUG: prevent static initialization fiasco during factory registration
        BUG: fix writing a corrupt meta image header from unknow metadata
        BUG: fix for overlay functor for llvm optimization bug
        ENH: adding support for VectorImage output in LabelMapCountorOverlay
        BUG: Fix segfault when no inital means were set.
        BUG: verify sigma is a positive number for Recursive Gaussian
        COMP: fix exception specification warning
        BUG: Restore automatic loading of factories in ITK_AUTOLOAD_PATH
        BUG: Avoid warning by using ProcessObject::GetInput method
        COMP: add missing functional header for logic ops tests
        BUG: The incorrect auto_load path was specified in itkIOPluginTest
        BUG: Use path to configure NrrdIO.h for installation
        PERF: Replacing iterator copy with optimized ImageAgotithm::Copy
        BUG: Prevent segfault when logger not set for PatchedBasedDenoising
        BUG: Update uncrustify configuration with space before access spec
        ENH: Enabling support for system lib versions prior to TIFF 4.0.0
        STYLE: Fixed numerous style error in PatchBased denoising
        BUG: Internal factory must use RegisterFactoryInternal method
        BUG: Fix Wrapping FFTWComplexToComplex
        ENH: updating to libtif 4.0.3
        BUG: Fix compilation ofswig external project
        BUG: Fix segfault from integer overflow in NIFTI reader
        BUG: disable wrapping of Toboggan filter for win 64
        ENH: adding support for VectorImage to JoinSeries filter
        ENH: support for VectorImage output to GradientRecursiveGaussian
        BUG: Correcting wrapping CMakeList.txt for DCMTK
        ENH: Improve MRCImageIO support for VectorImages
        COMP: Adding Valgrind suppression for NRRD IO on RH6
        ENH: Convert the Modulus filter to standard binary filter
        BUG: unset environmental default number of threads
        COMP: Adding valgrid suppression file for RHEL6
        BUG: Remove NiftiBigIO Test add MEMORY_SIZE test lock
        COMP: Fix WrapITK warning in DCMTK
        BUG: Append FFTW dirs to ITK's in ITKConfig
        COMP: Fix link error with visibility-inlines-hidden
        BUG: ShrinkImageFilter marked as modified in SetShrinkFactor
        BUG: Prevent modulus by zero is Modulus functor
        BUG: Enable the rehash method to re-register internal factories.

  Brian Avants (2):
        COMP: The + operation was not registering on Win7-vc10-vce32rel
        BUG: InputImageDimension should be OutputImageDimension

  Brian Helba (1):
        ENH: Update Remote/LesionSizingToolkit to newer commit

  Cory Quammen (4):
        BUG: Added missing include 
        BUG: Propagate the spacing and meta-data in FFTWForwardFFT fitler.
        BUG: Added locking around fftw_destroy_plan
        DOC: Modify PasteImageFilter comments.

  David Doria (6):
        ENH: Add a SetRegion function to all ImageIterators.
        ENH: Add SetRegion function to NeighborhoodIterators.
        ENH: Allow the ShapedNeighborhoodIterators to use SetRegion.
        COMP: Replace stdlib.h with cstdlib.
        STYLE: Replace dash character in comment.
        STYLE: Replace C Library headers with c[headername]

  Dirk Padfield (3):
        PERF: Faster distance computation and fixed reflective iterator bug
        BUG: Corrected bug in SignedDanielssonDistanceMap and added regression tests.
        ENH: Templated MaskedFFTNormalizedCorr. over MaskType (#ITK-2940)

  Fotis Drakopoulos (1):
        BUG: Variance and structure tensor fix

  Gang Song (2):
        ENH: Add sparse threader for ANTS CC metric
        COMP: Remove deque header from metric class header

  Gordon Kindlmann (5):
        ENH: updating ITK's NrrdIO to reflect state of Teem's NrrdIO, take 4
        ENH: re-enabling warnings for NrrdIO
        ENH: warning about idxIn in reorder.c; no trailing whitespace
        ENH: still trying to quash warning about idxIn in reorder.c
        BUG: tracking changes (hopefully the last) in Teem prior to its 1.11 release

  Hans Johnson (35):
        ENH: Bump version to 4.3.0
        BUG: Test harness gave false positives
        BUG: Remove duplicate file in wrong place
        ENH: Allow removal of all Deprecated code
        COMP: Remove unnecessary const_cast.
        STYLE: Remove all references to StartRegistation
        BUG: Array overrun in LaplacianRecursiveGaussian
        COMP: Revert use of itkLegacyMacro
        ENH: Improve testing of GetInverse
        PERF:  Const correct optimize initialization.
        COMP: Fix data type for consistency
        ENH: Imaging data should not be in git
        BUG: Missing DisplacementFieldTransform IO
        COMP: Fix warning for propogating success status
        BUG: Make IsTransformQueueEmpty const
        STYLE: Convert CMake-language commands lower case
        STYLE: Remove CMake-language block-end arguments
        BUG: Reading composite transform error
        ENH: Update compiler fixes for fftw external
        BUG: Test harness gave false positives
        BUG: Remove duplicate file in wrong place
        COMP: Remove unnecessary const_cast.
        COMP: Unused variable warning with FFTW options
        ENH: Test always uncondintionally returned true
        STYLE: Add more files that need to be ignored
        STYLE: Fix typo in comment.
        PERF: Avoid costly redundant computations.
        BUG: Removed too stringent ConceptChecking
        PERF: Remove unnecessary function GetImageDimension
        STYLE: Remove dead code ITK_TEMPLATE_EXPLICIT
        STYLE: Made use of .hxx guards consistent
        DOC: Update space before access specification
        BUG: Allow backwards compatibilty for ITK_TEMPLATE_TXX
        STYLE: Make round consistent in ITK.
        BUG: Incorrect syntax for Intel optimize pragma

  Ho Cheung (4):
        COMP: Add "#include " to classes for VS2012
        PERF: Fix usage of ElementAt in PolyLineParametricPath to use const version
        BUG: Make LaplRecurGauss filter set the number of threads on the subfilters
        COMP: Fix regression of name mangling for libtiff

  ITK Migration V4 (3):
        DOC: Modify ComposeImageFilter comments.
        DOC: Modify VectorIndexSelectionCastImageFilter comments.
        DOC: Modify AnisotropicDiffusionFunction comments.

  Jean-Christophe Fillion-Robin (2):
        BUG: Prevent MetaIO vessel tube from getting stuck in while loop
        BUG: Add test for MetaIO vessel tube from getting stuck in while loop

  Jeffrey Duda (1):
        ENH: Updates for multivariate metrics

  Kent Williams (18):
        PERF: Pull expensive GetInput/GetOutput calls out of inner loops
        COMP: propogate compiler selection & flags to FFTW build
        STYLE: Remove superfluous static_cast
        PERF: Pull expensive GetInput/GetOutput calls out of inner loops
        STYLE: Refine usage of static_cast
        BUG: B.Lowenkamp's changes to detect empty fields in Meta files
        BUG: isblank is missing on Microsoft Visual Studio.
        COMP: propogate compiler selection & flags to FFTW build
        BUG: Added test to verify metadata gets copied on file write w/Nrrd
        BUG: Add regression test to try very long filename w/MetaIO
        ENH: Allow change of tolerance in ImageToImageFilter
        DOC: Document spacing/direction tolerance access methods.
        BUG: Orientation vector in FiniteCylinderFunction
        PERF: hoist computation of norm outside Evaluate method.
        ENH: Add DCMTKImageIO to ITK
        BUG: Origin was lost reading HDF5 format images.
        COMP: add new gdcm test for SeriesReader + MetaDataDictionary
        COMP: add set methods for member variables where missing.

  Kris Zygmunt (5):
        PERF: Optimize patch-based denoiser tensor computations
        BUG: GPU tests sometimes fails
        BUG: SymmetricEigenAnalysis OrderByMagnitude bug
        PERF: speed up patch-based denoising tests
        BUG: Denoising 3D patch weights incorrect

  Marius Staring (1):
        ENH: Creating a typedef for the modified time

  Matthew McCormick (64):
        ENH: Allow custom name for ProcessObject Primary Input/Output.
        DOC: Clarify ProcessObject NumberOfRequiredInputs.
        STYLE: Fix style in itkBlockMatchingImageFilterTest.
        BUG: Fix BlockMatchingImageFilter for pipeline updating.
        DOC: Use one column in the Doxygen alphabetical class index.
        BUG: Fix GCC_XML and SWIG ExternalProject dependencies.
        BUG: Fix multi-object MetaIO reading for ASCII MetaVesselTube.
        STYLE: Improve readability and debugability in MetaScene.
        BUG: Fix multi-object MetaIO reading for ASCII MetaVesselTube.
        COMP: Fix QuadEdgeMesh doxygen warnings.
        ENH: Wrap new exponential Transform classes.
        STYLE: Use typedefs in TreeNode.
        STYLE: Use more descriptive names in itkSceneSpatialObject.hxx.
        STYLE: Cleanup WrapITK comments.
        BUG: Fix WrapITK GCCXML ExternalProject dependency.
        COMP: Make sure the VC script gets executed after gccxml installation.
        ENH: Use tarball for gccxml ExternalProject build.
        PERF: Use GetPrimaryOutput in ImageSource GetOutput.
        COMP: Add missing deque header for ANTSNeighborhoodCorrelation metric.
        BUG: Fix WrapITK GCCXML ExternalProject dependency.
        COMP: Make sure the VC script gets executed after gccxml installation.
        BUG: Fix multi-object MetaIO reading for ASCII MetaVesselTube.
        ENH: Bump release branch CMakeLists.txt version to 4.2.1.
        DOC: Update Doxygen config's for 1.8.2.
        DOC: Remove out-of-date files in Documentation/
        STYLE: Use EXIT_SUCCESS in itkQuadEdgeMeshPolygonCellTest.
        DOC: Improve Doxygen HTML layout.
        STYLE: Improve style in itkGaussianImageSourceTest.
        COMP: GaussianImageSource unsigned comparison always false.
        BUG: Fix VelocityFieldTransform classes wrapping.
        ENH: Support Vector scalar product with CovariantVector.
        MetaIO: Remove the executable bit from metaFEMObject.{h,cxx}.
        MetaIO: Fix invalid memory dereference with empty Meta field.
        COMP: Fix invalid unsigned comparison with 1D instantiation.
        ENH: Archive testing data in Midas.
        BUG: FixedArray wrapping for 4D wrapping.
        ENH: Add operator=( FloatType & rhs ) to CompensatedSummation.
        BUG: Improve robustness of RayCastInterpolateImageFunction.
        BUG: VTKPolyDataMeshIO for Meshes with Tensor Pixels. #2961
        COMP: Do not wrap WatershedImageFilter on Windows.
        BUG: Set the third-party libtiff VERSION to the correct value.
        COMP: Build with ITK_USE_SYSTEM_TIFF. #2967
        COMP: Fix wrapping of itkNarrowBandCurvesLevelSetImageFilter. #2970.
        COMP: Do not run itkSampleToHistogramFilterTest4 with VC.
        COMP: Fix 1D wrapping of itkImageToVTKImageFilter.
        MetaIO: Prevent vessel tube from getting stuck in while loop
        MetaIO: Fix error in metaVesselTube ASCII reader.
        COMP: Disable DCMTK for MinGW.
        COMP: Ignore DCMTK build warnings.
        BUG: Use HTTP protocol by default for Git pull URLs.
        COMP: Better identification of MSVC90.
        STYLE: Fix style of BorderQuadEdgeMeshFilter.
        STYLE: Fix style of CleanQuadEdgeMeshFilter.
        STYLE: Rename itkMultiTransformBase to itkMultiTransform.
        COMP: Wrap MultiTransform.
        STYLE: Fix style in MultiTransform.
        COMP: Disabling the VideoStreamTest.
        COMP: Suppress fftw ExternalProject warnings.
        COMP: LabelImageInterpolateImageFunctionTest type conversion.
        COMP: Add include directory for ITK_USE_SYSTEM_HDF5.
        COMP: itkLabelImageGaussianInterpolateImageFunctionTest signed unsigned.
        COMP: Fix Doxygen warnings.
        COMP: Ignore libtool FFTW warnings with quote.
        COMP: Fix HDF5IO with ITK_USE_64BITS_IDS on Windows.

  Matthias Seise (1):
        COMP: Compile wrapITK for python2.7,64bit on windows

  Michael Stauffer (6):
        PERF: Optimize GetValue in v4 image metrics.
        ENH: Add "WithOnlyIndex" iterators.
        PERF: improve speed of ImageToImageMetricv4 and derived metrics
        ENH: Add parameter weighting option to Optimizersv4
        ENH: Add MultiTransformBase
        DOC: Fix to ObjectToObjectOptimizerBase documentation

  Nick Tustison (20):
        ENH: Expanding HasLocalSupport to transform categories.
        ENH:  Adding ability to prepend transform queue.
        ENH: Adding labeled point set metric.
        ENH:  Add GetTransformCategory() to translation transform.
        ENH: Adding exponential transforms.
        ENH:  Adding common transforms to be registered.
        BUG:  Voxel size scaling needed
        ENH:  Enable inverse for exponential transforms.
        ENH:  BSpline automated scales estimation.
        BUG: Fix resampling of constant velocity field.
        BUG:  Uninitialized variable.
        ENH:  Reorganization of vel. field transforms.
        BUG:  Control point grid origin wasn't set correctly.
        ENH:  Adding option to permit voxel-based smoothing.
        ENH:  Adding Multiple label STAPLE.
        BUG:  Disp. field xfrm inverse not set correctly.
        ENH: Multiple metrics in registration methods.
        BUG:  Incomplete dynamic casting.
        BUG: Correcting valgrind error.
        BUG:  Set correct images in update field.

  Paul Novotny (1):
        COMP: Fix Spatial Object Test Segfaults

  Richard Beare (1):
        ENH: Functors for logic operations

  Willi Huber (2):
        COMP: WrapITK generates non-unique typedefs in FFT submodule
        COMP: Fix the wrapping for some modules

  Xiaoxiao Liu (3):
        ENH: Update LSTK version.
        BUG: Update LSTK version to sync with VTK 6.0.
        BUG: Fix ffmpeg VideoStream failing tests.

Video
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