co-premiers auteurs RESUMELa vision tubulaire est une déficience visuelle dans laquelle seul le champ central de la vision est préservé. Elle génère de grandes difficultés dans la vie quotidienne, notamment lorsqu'il s'agit de repérer un objet d'intérêt dans l'environnement. Des informations tactiles, considé-rées comme discrètes, personnelles et peu invasives, peuvent permettre d'améliorer le comportement de recherche visuelle. Dans cette étude, nous avons conçu quatre techniques tactiles permettant de localiser un point spécifique dans l'espace. Les stimulations tactiles étaient soit un seul stimulus soit un train de stimuli transmis dans un système de coordonnées cartésien ou polaire. Les quatre techniques ont été comparées dans une tâche d'orientation de la tête. La plus efficace des techniques a été évaluée avec une tâche de recherche visuelle dans un environnement virtuel complexe. L'évaluation impliquait dix sujets avec un champ visuel artificiellement restreint à 10°, et un sujet avec une vision tubulaire due à un glaucome. Notre dispositif d'assistance a significativement amélioré l'efficacité de la recherche visuelle d'un facteur trois. Le dispositif pourrait être facilement intégré dans des lunettes intelligentes et détecter des cibles d'intérêt, soit sur demande, soit de façon automatique (par ex. les obstacles potentiels), facilitant ainsi, la recherche visuelle et la perception spatiale de l'environnement.
International audienceIn the domain of Human Computer Interaction (HCI), recent advances in sensors, communication technologies, miniaturization and computing capabilities have led to new and advanced forms of interaction. Among them, Mixed Interactive Systems (MIS), form a class of interactive systems that comprises augmented reality, tangible interfaces and ambient computing; MIS aim to take advantage of physical and digital worlds to promote a more transparent integration of interactive systems with the user's environment. Due to the constant change of technologies and the multiplicity of these interaction forms, specific development approaches have been developed. As a result, numerous taxonomies, frameworks, API and models have emerged, each one covering a specific and limited aspect of the development of MIS. To support a coherent use of these multiple development resources and contribute to the increasing popularity of MIS, we have developed a framework based on Model-Driven Engineering. The goal is to take advantage of Model-Driven Engineering (MDE) standards, methodology and tools to support the manipulation of complementary Domain Specific Languages (DSL), to organize and link the use of different design and implementation resources, and to ensure a rationalized implementation based on design choices. In this paper, we first summarize existing uses of MDE in HCI before focusing on five major benefits MDE can provide in a MIS development context. We then detail which MDE tools and resources support these benefits and thus form the pillars of the success of an MDE-based MIS development approach. Based on this analysis, we introduce our framework, called Guide-Me, and illustrate its use through a case study. This framework includes two design models. Model transformations are also included to link one model to another; as a result the frameworks coverage extends from the earliest design step to a software component-based prototyping platform. A toolset based on Eclipse Modeling Framework (EMF) that supports the use of the framework is also presented. We finally assess our MDE-based development process for MIS based on the five major MDE benefits for MIS
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