The continuously improving spatial resolution of remote sensing sensors sets new demand for applications utilizing this information. The need for the more efficient extraction of information from high resolution RS imagery and the seamless integration of this information into Geographic Information System (GIS) databases is driving geo-information theory and methodology into new territory. As t...

In my doctoral work, I focus on the deenition and formal background for an implementation of a constraint data model to be built on the top of an object-relational DBMS. My approach is designed to exploit existing spatial and temporal tools (mainly the one from Oracle8) yielding the declara-tiveness and expressiveness of constraint programming .

There are three major subtleties which may restrict a problem solver: How can it be designed so that it controls its own mechanism for making heuristic choices? If this control process is solved by the same mechanism which solves basic tasks, how can the problem solver avoid unlimited regression in a tower of control problems? When it solves one task by creating some new entity, how can this en...

When implementing a multilevel security policy for Object-Oriented Databases (OODBs), several aspects have to be investigated. One of these aspect is the design of multilevel OODBs. In an OODB, data are organized in a complex structure built using different constructs (classes, objects, attributes, links ...). Therefore, a first problem is to determine what constructs of the object-oriented mod...

Deformable 3D reconstruction from 2D images requires prior knowledge on the scene structure. Template-free methods [1, 2, 5, 6, 9, 14] use generic prior knowledge such as piecewise smoothness but require multiple images with significant baseline. Template-based methods [4, 10, 13] require only one image but handle only one object for which they need specific prior knowledge, namely a 3D templat...