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Entropy Image Filter
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This paper describes an intensity image filter for computing the entropy of pixel values contained within a neighborhood centered at each input pixel. The output image contains the calculated entropy for each input pixel location. This paper is accompanied [...]

A Fast Approximation to the Bilateral Filter for ITK
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This document describes an implementation of an alternative bilateral filtering algorithm in ITK. This class implements the fast bilateral filter algorithm in ITK by taking the input image and organizing it into the required data structure as an ITK Image [...]

Variance Image Filter
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This paper describes an intensity image filter for computing the variance of pixel values contained within a neighborhood centered at each input pixel. The output image contains the calculated variance at each input pixel location. Variance calculations can [...]

An Image Filter for Counting Pixel Neighbors
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This papers describes an image filter that counts the number of neighbors a pixel has storing that value at the pixel's image index. Functionality is provided to 1) adjust the neighborhood size, 2) count only those pixels within a specific value range, and 3) [...]

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 Label Geometry Image Filter for Multiple Object Measurement
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The itkLabelGeometryImageFilter is a new ITK filter that enables the measurement of geometric features of labeled objects. It calculates features similar to the "regionprops" command of Matlab. It is related to the itkLabelStatisticsImageFilter in that both [...]

Flux driven medial curve extraction
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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 [...]

Image Kernel Convolution
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Convolution is a basic operation in image analysis and the Insight Toolkit provides a well-framed mechanism for such operations (see Chapter 11 of the ITK Software Guide. The classes associated with this contribution are meant to simplify convolution [...]

Efficient contour detection in binary and label images
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ly in ITK, the only way to find the contour of the objects in a binary image is to use the BinaryErodeImageFilter, with a kernel of radius 1. This filter is a generic filter, made to support any shape and size of structuring element, and thus is not optimized [...]

Alternative Memory Models for ITK Images
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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 [...]

Applying Image Mining to Support Gestational Age Determination
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The gestational age (GA) determination is one of the most used measures to guide diagnostics of specialists in neonatology to guarantee the newborn surveillance. However, the currently available methods have been subject to a number of evaluations and [...]

Using a Mask to Decrease Computation Time for SpatialObject to Image Conversions
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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 [...]

Adaptations of MARACAS algorithm to the segmentation of the carotid bifurcation and stenosis quantification in CTA images
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This paper describes a 3D CTA image segmentation method submitted to the CLS09 contest (Carotid Lumen Segmentation and Stenosis Quantification) held in conjunction with the MICCAI 2009 conference. First, images are denoised to improve image quality and [...]

Generalizing vesselness with respect to dimensionality and shape
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In this paper we present a generalization of Frangi's vesselness measure cite{Frangi1998} for the enhacement of M-dimensional shapes in N-dimensional images, together with the implementation of the corresponding Insight Toolkit (ITK) filter [...]

The Generalised Image Fusion Toolkit (GIFT)
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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, [...]

Inverting deformation fields using a fixed point iteration scheme
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Being able to quickly compute the inverse of a deformation field is often useful in the context of medical image analysis. While ITK supports this functionality, the current algorithms are slow and do not always yield accurate results. In this paper we [...]

Open Source Software in the Development and Testing of an Image-Guided Robot System
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This paper describes the use of open source software in the development and testing of an image-guided robot system for small animal research, presented at MICCAI 2006. This system relied on a significant amount of open source software, including 3D [...]

Phase Correlation Method for ITK
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Phase Correlation Method (PCM or SPOMF - Symmetric Phase-Only Matched Filter) is a well known image registration method, that exploits Fourier Shift Theorem property of Fourier Transform. Even though it is limited to estimate only shifts between two images, [...]

Cumulative Gaussian Curve Fitter for Boundary Parameterization
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We have previously developed an algorithm for locating boundaries in an image with sub-pixel resolution, as well as estimating boundary width and image intensity within the adjoining objects. The algorithm operates by finding the parameters of a cumulative [...]

Minimally Interactive Knowledge-based Coronary Tracking in CTA using a Minimal Cost Path
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An algorithm for minimally interactive coronary artery tracking is presented. Tracking ability and accuracy results are demonstrated on 16 images CTA images. First, a region of interest is automatically selected and a denoising filter applied. Then, for each [...]


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ISSN 2328-3459
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