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Surface Meshes Incremental Decimation Framework
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When dealing with meshes, it is often preferable to work with a lower resolution mesh for computational time purpose, display. The process of reducing a given mesh, mesh decimation, is thus an important step in most of pipeline dealing with meshes. [...]

Using TubeTK to Automatically Merge Volumes
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This article describes implementation of a CLI module to merge an image into the space of another adjacent image using the Insight Toolkit. The algorithm constructs a smoothly stitched image out of two or more smaller images. The overlapping regions of the [...]

Gaussian Interpolation
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In this submission, we offer the GaussianInterpolationImageFunction which adds to the growing collection of existing interpolation algorithms in ITK for resampling scalar images such as the LinearInterpolateImageFunction, BSplineInterpolateImageFunction, and [...]

Introduction to ITK Resample In-Place Image Filter
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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 [...]

Grid voxelization with partial volume effects in VTK
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We present a filter that voxelizes the volume of a 3D structured, unstructured, or rectilinear grid into a vtkImageData with partial volume effects. The partial grid volume occupying each voxel is computed exactly from the intersection of the grid volume and [...]

A generic interpolator for multi-label images
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We present a generic interpolator for label images. The basic idea is to interpolate each label with an ordinary image interpolator, and return the label with the highest value. This is the idea used by the itk::LabelImageGaussianInterpolateImageFunction [...]

Helper class for initializing the grid parameters of a BSpline deformable transform by using an image as reference
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This document describes a simple helper class intended for making easy to initialize the grid parameters of a BSplineDeformableTranform. This paper is accompanied with the source code, input data, parameters and output data that we used for validating the [...]

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 [...]

An OpenCL implementation of the Gaussian pyramid and the resampler
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Nonrigid image registration is an important, but resource demanding and time-consuming task in medical image analysis. This limits its application in time-critical clinical routines. In this report we explore acceleration of two time-consuming parts of a [...]

An ITK Implementation of a Diffusion Tensor Images Resampling Filter
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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. [...]

Voxelizer plug-in for Blender
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This document describes a plug-in for Blender (www.blender.org) that allows to rasterize 3D mesh objects into 3D voxel data, i. e. it allows to voxelize Blender meshes. In 2D, this process can be compared to rasterization of vector graphics into pixel [...]

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, [...]

DICOM Spatial Transform IO in the Insight Toolkit
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This document describes a module that extends the Insight Toolkit, ITK, which reads DICOM Spatial Rogistration Object files in itk::Transform's. Currently, DICOM files are read by applying the DCMTK library as a backend. An itk::DCMTKTransformIO class can be [...]

A patch-based framework for new ITK functionality: Joint fusion, denoising, and non-local super-resolution
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In an earlier Insight Journal article, we introduced an ITK implementation of the adaptive patch-based image denoising algorithm described in [3]. We follow-up up that offering with a generalized non-local, patch-based ITK class framework and a refactored [...]

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 [...]

A Spline-Driven Image Slicer
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In this article, a spline driven image slicer algorithm is presented. It is concretized through a vtkAlgorithm-inherited class that takes two inputs and gives two outputs. The first input is the volume from which the slice should reconstructed while the [...]

An Open Source, Fast Ultrasound B-Mode Implementation for Commodity Hardware
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This document describes an open source, high performance ultrasound B-Mode implementation based on the Insight Toolkit (ITK). ITK extensions are presented to calculate the radio-frequency (RF) signal envelope. A variety of 1D Fast Fourier Transform options [...]

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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