Feature/hilbert bg #84
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The standard
Hilbertimage-mesh suffers a systematic where the vast majority of points are drawn from the high weighted reigons. This often leaves few points to reconstruct the lower weight regions, leading to discontinuities in the reconstruction.This PR implemented a balcned hilert image-mesh addresses this by drawing half the points from the weight map and the other half from (1 - weight map). This ensures both high and low weighted regions are sampled equally, but still has sufficient flexibility to dedicate many points to the highest weighted regions.