Modelling Spatial Relationships between Colour Clusters

Modelling of image content based on chromatic arrangement requires suitable techniques for the representation of the spatial relationship between complex sets of pixels. We propose a model of spatial relationship between extended sets, which can be computed with the same computational complexity involved in conventional representations based on centroids, but which improves effectiveness by accounting for the overall sets of pixels involved in the relationship. The effectiveness of the proposed model is compared against the orientation between centroids in a user-based evaluation.