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Polar Transforms for ITK
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Polar transform is a geometric transform, that transforms points form cartesian coordinates to so-called polar coordinates. In case of 2D space, a point in polar coordinate system is addressed by radius and angle. In image processing, polar transform is [...]

Morphology with parabolic structuring elements
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Morphological erosion and dilation filters employ a structuring function, with flat structuring functions being the most common example. This article will use the term ``parabolic'', but much of the literature uses ``quadratic'' structuring functions are less [...]

LookAt Transform Initializer and Oblique Section Image Filter
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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 [...]

Generating a Deformation Field from a Transform
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This document describes a new class that takes an doxygen{Transform} and evaluates the deformation at points in a user-defined region. The class is implemented using the Insight Toolkit url{www.itk.org}. This paper is accompanied with the source code, [...]

Parallel algorithms for erosion and dilation of label images.
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It is sometimes useful to be able to apply binary morphological operations, such as erosions and dilations, to labelled images in a fashion that preserves the labels. This article introduces a specialised class implementing parallel methods described in beare [...]

Exact Geometrical Predicate: Point in circle
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This document describes the implementation in ITK of the "point in circle" geometrical predicate. Based on Jonathan Shewchuk's work which implements an exact version of the predicate using standard floating point types and arithmetic, the implementation [...]

Structural MRI Unwarping Using CMTK
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This document describes the workflow for unwarping structural MR images, in particular T1-weighted SPGR and MP-RAGE scans, using reference scans of the Magphan(R) EMR051 Quantitative Imaging Phantom (a.k.a. ADNI Phantom) and the tools of the Computational [...]

Direct Fourier Tomographic Reconstruction Image-To-Image Filter
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We present an open-source ITK implementation of a direct Fourier method for tomographic reconstruction, applicable to parallel-beam x-ray images. Direct Fourier reconstruction makes use of the central-slice theorem to build a polar 2D Fourier space from the [...]

An ITK Implementation of the Symmetric Log-Domain Diffeomorphic Demons Algorithm
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This article provides an implementation of the symmetric log-domain diffeomorphic image registration algorithm, or symmetric demons algorithm for short. It generalizes Thirion's demons and the diffeomorphic demons algorithm. The main practical advantages of [...]

Facet Analyser: ParaView plugin for automated facet detection and measurement of interplanar angles of tomographic objects
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The presented ParaView plugin allows easy access to the algorithm described in Ref 1. It enables analysis of faceted objects that exhibit distortions in their digital representation, e.g. due to tomographic reconstruction artifacts. The contributed [...]

BinShrink: A multi-resolution filter with cache efficient averaging.
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We present a new filter for the Insight Toolkit (ITK) for reducing the resolution of an image by an integer factor while averaging called BinShrink. This filter provides a new level of performance to ITK for reducing resolution and noise present in an image. [...]


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ISSN 2327-770X
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