Add randomized_strides

When calling mwatershed.agglom you can now pass randomized_strides=True. For a given offset/stride pair, the probability of picking an edge is equal to 1/prod(stride).

v0.5.1

Fix bug in agglomerate function when stride was set to None. In this case we generate default strides of 1x1x... however instead of generating one stride per offset we were generating one stride per dimension, resulting in many offsets being ignored in applications using long range affinities

Add strides

Arbitrary strides are now supported for each offset in your neighborhood.

v0.4

Fix bug in the processing of user defined edges

v0.3

Filter out the background.

Given an array of affinities, voxels will be merged and given ids greater than 0. If a voxel has no positive edges it is considered part of the background and will be assigned 0 unless it was given a seed label by the user, in which case the label will not change.

v0.2

add support for negative offsets

v0.1

initial release