# On the Non-Additive Sets of Uniqueness in a Finite Grid

Carla Peri, Paolo Dulio, Sara Brunetti

Risultato della ricerca: Contributo in libroContributo a convegno

11 Citazioni (Scopus)

## Abstract

In Discrete Tomography there is a wide literature concerning (weakly) bad configurations. These occur in dealing with several questions concerning the important issues of uniqueness and additivity. Discrete lattice sets which are additive with respect to a given set $S$ of lattice directions are uniquely determined by $X$-rays in the direction of $S$. These sets are characterized by the absence of weakly bad configurations for $S$. On the other side, if a set has a bad configuration with respect to $S$, then it is not uniquely determined by the $X$-rays in the directions of $S$, and consequently it is also non-additive. Between these two opposite situations there are also the non-additive sets of uniqueness, which deserve interest in Discrete Tomography, since their unique reconstruction cannot be derived via the additivity property. In this paper we wish to investigate possible interplays among such notions in a given lattice grid $\mathcal{A}$, under $X$-rays taken in directions belonging to a set $S$ of four lattice directions.
Lingua originale English Discrete Geometry for Computer Imagery, 17th IAPR International Conference, DGCI 2013, Seville, Spain, March 20-22, 2013, Proceedings 288-299 12 https://doi.org/10.1007/978-3-642-37067-0-25 Pubblicato - 2013 tHE 17th International Conference on DISCRETE GEOMETRY for COMPUTER IMAGERY (DGCI 2013) - SivigliaDurata: 20 mar 2013 → 22 mar 2013

### Serie di pubblicazioni

Nome Lecture Notes in Computer Science, Vol. 7749

### Convegno

Convegno tHE 17th International Conference on DISCRETE GEOMETRY for COMPUTER IMAGERY (DGCI 2013) Siviglia 20/3/13 → 22/3/13