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Parallel algorithms for erosion and dilation of label images.

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 et al [2011] that provide very fast dilations by circles and spheres of arbitary size. Comparisons with other implementations using currently available building blocks are also made.