A diagram is sketched with a pen. The draft is automatically beautified. The user may add, replace, erase, modify the diagram. The whole structure of the diagram is automatically updated after local modifications. Beautification and updating are based on the detection of meaningful perceptual constraints (alignments, equality of sizes etc.). [papers]

The conversion of paper documents into structured e_documents is necessary to enable content-based information search and to adapt the layout to screen reading. PixED simulates the task that a human reader performs to detect the organisation of a document by scanning it, without a in-depth reading of the text. The result of the analysis is a structured description : the document images are segmented into components, the reading order is detected and the components are labelled with metadata. E_documents may be built from this description. The Figure shows the table of contents built from the headings, paper title and author names which are detected in the images of a scientific paper. [papers]

What do people need when they are mobile? The information that is needed is related to the very close future of the user or even to emergency. In a campus, students receive alert messages on their mobile device when unpredictable events occur. They consult the intranet information pages to know which class to attend, what is going on in the campus and how to contact people. The presentation of these pages is adapted to the small screens of mobile devices. People may be assisted by a wayfinder service to reach a place in the campus. They are guided along their route, with instructions showing photos of their neighbourhood associated with text. [papers]
Videos    -    GEOservice

Users are involved in the design and the evaluation of interactive systems. Scenario-based design and storyboards produce useful previews of the system. Images right: A picture of the storyboard drawn for starting the design of an augmented white board and the final system used in a class.

Videos and observations help to better know the users: how they undertake a task and react to instructions or questions. Images below: People answering the question "Where is the restaurant?" Video made for the design of an indoor wayfinder service.

Users are all different but they are all human beings. Learning what they have in common is a way to avoid starting from scratch when designing interactive systems. Images below: an experiment to learn about preferred gestures and shapes for designing pen-based user interfaces involving gestural commands.

[papers]