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Graham Treece

ENGINEERING TRIPOS PART IIA

Module 3G4 - Medical Imaging and 3D Computer Graphics

Image sampling and interpolation

wxDicom screenshot

Download wxDicom for Windows operating systems here.

This software can be used to show the properties of various interpolation and some filtering algorithms on medical data. For example:

You can choose no interpolation, nearest neighbour, bi-linear, cubic B-spline, Catmull-Rom spline, etc, and the original data can be down-sampled to make the interpolation artefacts clearer
The data can be filtered using a mean, Gaussian, median, opening or closing operation, and optionally thresholded, or the gradient shown
Medical data with more than 8 bits can be dynamically windowed (compressed from a higher number of bits) with the windowing function plotted
It is possible to see how the interpolated data varies along any line drawn in the image

As the name suggests, wxDicom will load (most) Dicom format medical data, including multiple slice data or multiple file sequences, as well as various other image formats. The displayed data can also be saved to one or a sequence of image files.

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