2D Distance Map / Distance Transform in CUDA ?

Hi, do there exist some parallel cuda-iz-able algorithms for computing the (2D) distance map for an image (‘distance transform’, given a 2-d boundary shape, computes for each ‘inner’ pixel the distance to nearest boundary pixel)
For an explaination of distance map → see [url=“Distance transform - Wikipedia”]http://en.wikipedia.org/wiki/Distance_transform[/url]

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