We study Voronoi diagrams for distance functions that add together two convex functions, each taking as its argument the difference between Cartesian coordinates of two planar points. When the ...

A new approach is presented for partitioning an image database by classifying and indexing the convex hull shapes and the concavity features of regions. The result is a significant increase in image ...

A shortest-path algorithm together with the convex-hull information is used to separate the composite. Since these features based upon the convex hull are insensitive to character fonts and sizes, the ...