Real-Time Panoramic Tracking for Event Cameras

Event cameras are a paradigm shift in camera technology. Instead of full frames, the sensor captures a sparse set of events caused by intensity changes. Since only the changes are transferred, those cameras are able to capture quick movements of objects in the scene or of the camera itself. In this work we propose a novel method to perform camera tracking of event cameras in a panoramic setting with three degrees of freedom. We propose a direct camera tracking formulation, similar to state-of-the-art in visual odometry. We show that the minimal information needed for simultaneous tracking and mapping is the spatial position of events, without using the appearance of the imaged scene point. We verify the robustness to fast camera movements and dynamic objects in the scene on a recently proposed dataset and self-recorded sequences.Comment: Accepted to International Conference on Computational Photography 201

A Multi-actor Multi-Criteria Scenario Analysis of Regional Sustainable resource policy

The increasing scarcity of natural resources prompts the need to develop effective strategies for sustainable development at regional levels with a view to balancing the interests of different groups of actors or stakeholders. This study aims to address the stakeholders' multifaceted viewpoints on future sustainable development, mainly at regional scales. To this end, five experimental test cases - in the form of five different case studies in Europe - are analyzed, to encapsulate different approaches and different needs for sustainable development. A 'pentagon model' is used to represent systematically five critical aspects of sustainability. To analyze the trade-offs and synergies between different objectives on sustainable development, four distinct scenarios - competitiveness; continuity; capacity; and coherence - reflecting distinct and relevant images of sustainability are presented. The relative merits of these four scenarios are empirically assessed by means of a particular type of multi-criteria analysis: namely, regime analysis. The analysis is carried out by ranking different attributes of sustainable development, i.e. social, economic, ecological, institutional profile, and physical, from the perspective of different stakeholders. We find that the most preferred sustainable future is the coherence scenario, in which a combination of ecological and social aspects is the most important determinants. © 2012 Elsevier B.V