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In this document we present an ITK image filter that outputs a new image with identical voxel contents but with modified physical space representation. The physical space representation of an image is modified to reflect the physical space transform on the [...]
Deforming a 3D surface mesh while preserving its local detail is useful for editing anatomical atlases or for mesh based segmentation. This contribution introduces new classes for performing hard and soft constraints deformation in a flexible design which [...]
This paper describes the Insight Toolkit (ITK) Conformal Flattening filter: itkConformalFlatteningFilter.
This ITK filter is an implementation of a paper by Sigurd Angenent, et al., “On the Laplace-Beltrami
Operator and Brain Surface Flattening”. This [...]
Efficient multithreading for manycore processor: Multidimensional domain decomposition using Intel® TBB
Published in The Insight Journal
Published in The Insight Journal
The Insight Toolkit (ITK) utilizes a generic design for image processing filters that allows many developers to rapidly implement new algorithms. While ITK filters benefit from a platform-independent and versatile multithreading capability, the current [...]
ITK currently supports real to complex conjugate forward and inverse Fourier transformation's through dedicated filters. In turn, these utilize one of a number of Fourier transform implementations, such as that available through VNL, through FFTW or through [...]
How to use the itk::NaryElevateImageFilter and itk::UnaryRetractImageFilter for the post-processing of medical 4D data
Published in The Insight Journal
Published in The Insight Journal
The subject of the paper is to introduce a new class of 4D filters to itk.While it is very easy to load a 3D volume stored as a series of DICOM images with ITK, some convenience functions that are already available for 3D volumes are not yet available for the [...]
The current ITK release (2.8) already contains a filter that enables permuting coordinate axes of an image: PermuteAxesImageFilter. PermuteAxesTransform provides similar functionality in form if ITK transform. It enables permuting axes as a part of image [...]
An ITK Filter for Bayesian Segmentation: itkBayesianClassifierImageFilter
Published in The Insight Journal
Published in The Insight Journal
An Insight Toolkit (ITK) filter for image segmentation with
applications to brain MRI scans is presented in this paper. Previously, we
showed how ITK could be used to implement our algorithm. This paper
presents our new ITK filter for Bayesian segmentation [...]
This paper describes the Insight Toolkit (ITK) Spherical Wavelet object: itkSWaveletSource. This
ITK object is an implementation of a paper by Schr¨oder and W. Sweldens, “Spherical Wavelets: Effi-
ciently Representing Functions on the Sphere” [8], with [...]
An ITK Implementation of a Diffusion Tensor Images Resampling Filter
Published in The Insight Journal
Published in The Insight Journal
This paper describes the implementation of a resampling filter for Diffusion Tensor Images (DTI) in the Insight ToolKit (ITK). ITK already contains a filter for resampling scalar and vector images as well as several transformation and interpolation classes. [...]
This paper describes the ITK implementation of a transform initializer to produce a rigid 3-D transform able to center a given point on an arbitrary plane. The resultant transform allows the user to "look at" a point from a given direction. The resultant [...]
Thresholding is perhaps one of the most basic techniques in image processing. The Insight Toolkit (ITK) includes several threshold filters ranging from simple ones to Otsu based thresholding. Deep into the implementation of the Canny edge detection filter, [...]
In this document it is described the implementation of the flux driven automatic centerline extraction
algorithm proposed by Bouix et al. in 2004. This is based on a skeletonisation algorithm initially
proposed by Siddiqi et al. in 2002, using properties of [...]
This document describes a new remote module implemented for the Insight Toolkit ITK, itkTextureFeatures. This module contains two texture analysis filters that are used to compute feature maps of N-Dimensional images using two well-known texture analysis [...]
Optimizing ITK’s Registration Methods for Multi-processor, Shared-Memory Systems
Published in The Insight Journal
Published in The Insight Journal
This document describes work-in-progress for refactoring ITK’s registration methods to exploit the parallel, computation power of multi-processor, shared-memory systems. Refactoring includes making the methods multi-threaded as well as optimizing the [...]
Using a Mask to Decrease Computation Time for SpatialObject to Image Conversions
Published in The Insight Journal
Published in The Insight Journal
This article presents an approach for decreasing the computational time for converting a sparse SpatialObject to an Image. The method is applicable for SpatialObjects which occupy less volume than the total output Image (which occurs often, especially when [...]
Image fusion provides a mechanism to combine multiple images into a single representation to aid human visual perception and image processing tasks. Such algorithms endeavour to create a fused image containing the salient information from each source image, [...]
Primal/Dual Mesh with Application to Triangular/Simplex Mesh and Delaunay/Voronoi
Published in The Insight Journal
Published in The Insight Journal
This document describes an extension of ITK to handle both primal and dual meshes simultaneously. This paper describe in particular the data structure, an extension of itk::QuadEdgeMesh, a filter to compute and add to the the structure the dual of an existing [...]
By default ITK images use a contiguous memory model. This means pixel elements are stored in a single 1-D array, where each element is adjacent in memory to the previous element. However in some situations it is not desirable to use this memory model. This [...]
A nonparametric, entropy-minimizing MRI tissue classification algorithm implementation using ITK
Published in The Insight Journal
Published in The Insight Journal
This paper focuses on the role of open-source software in the development of a novel magnetic resonance image (MRI) tissue classification algorithm. Specifically, we describe the of use existing classes in the Insight Segmentation and Registration Toolkit [...]
Segmentation of Skull-infiltrated Tumors Using ITK: Methods and Validation
Published in The Insight Journal
Published in The Insight Journal
Methods for segmentation of skull infiltrated tumors in Computed
Tomography (CT) images using Insight Segmentation and Registration
Toolkit ITK (www.itk.org) are presented. Pipelines of filters and
algorithms from ITK are validated on the basis of [...]
