Insertion and Expansion Operations for

Hierarchical representations, such as irregular pyramids, are the bases of several applications in the field of discrete imagery. So, ndimensional "bottom-up" irregular pyramids can be defined as stacks of successively reduced n-dimensional generalized maps (n-G-maps) [11], each n-G-map being defined from the previous level by using removal and contraction operations defined in [15]. Our goal is to build a theoretical framework for defining and handling n-dimensional "top-down" irregular pyramids. To do so, we propose in this paper to study the definition of both insertion and expansion operations that allow to conceive these kinds of pyramids.

• Type: Conference
• Year: 2008
• Where: DGCI
• Authors: Mehdi Baba-ali, Guillaume Damiand, Xavier Skapin, David Marcheix
• Keywords: DGCI 2008, Discrete Geometry, Hierarchical Representations, Irregular Pyramids, N-dimensional Generalized Maps