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Abstract:
Animated mosaics are a traditional form of stop-motion animation created by
arranging and rearranging small objects or tiles from frame to frame. While
this animation style is uniquely compelling, the traditional process of
manually placing and then moving tiles in each frame is time-consuming and
labourious. Recent work has proposed algorithms for static mosaics, but
generating temporally coherent mosaic animations has remained open. In
addition, previous techniques for temporal coherence allow non-photorealistic
primitives to layer, blend, deform, or scale, techniques that are unsuitable
for mosaic animations. This paper presents
a new approach to temporal coherence and applies this to build a method for
creating mosaic animations. Specifically, we characterize temporal coherence as
the
coordinated movement of groups of primitives. We describe a system for
achieving this coordinated movement to create temporally coherent geometric
packings of 2D shapes over time. We also show how to create static mosaics
comprised of different tile shapes using area-based centroidal Voronoi
diagrams.
