Dynamic Decals

Pervasive interfaces can present relevant information anywhere in our environment, and they are thus challenged by the non rectilinearity of the display surface (e.g. circular table) and by the presence of objects that can partially occlude the interface (e.g. a book or cup on the table). To tackle this problem, we propose a novel solution based on two core contributions: the decomposition of the interface into deformable graphical units, called Dynamic Decals, and the control of their position and behaviour by a constraint-based approach. Our approach dynamically deforms the interface when needed while minimizing the impact on its visibility and layout properties. To do so, we extend previous work on implicit deformations to propose and experimentally validate functions defining different decal shapes and new deformers modeling decal deformations when they collide. Then, we interactively optimize the decal placements according to the interface geometry and their interrelations. Relations are modeled as constraints and the interface evolution results from an easy and efficient to solve minimization problem. Our approach is validated by a user study showing that, compared to two baselines, Dynamic decals is an aesthetically pleasant interface that preserves visibility, layout and aesthetic properties.

Screenic (Re)orientations: Desktop, Tabletop, Tablet, Booklet, Touchscreen, Etc.

This essay discusses the orientations of the screen both as work surface and as display surface by focusing on the shifts from and to the horizontal and vertical axes of the screenic space. To do so, we have collected a variety of examples, mainly media art installations but also films and mixed-media performances, which serve to reconstruct an ‘evolution of the desk’ and to retrieve a new gesturality. Balancing the producer’s and the viewer’s perspectives, we argue that it is no longer the function but the usage of a certain device that determines its position on either the vertical or the horizontal axis.

Transparent type virtual image display using small mirror array

There is a demand to display image on a transparent medium. If we can show image superimposed on a window, it can attract interest of people. However, a current achieved transparent displays show images only on the display surface, hence it is difficult to show image superimposed on an object that exists behind the screen. Thus, it doesn't understand intuitively. On the other hand, a display which can be perceived the image behind the screen should be placed inclined. Therefore, it is difficult to apply to advertising and exhibition. The purpose of this study is to generate transparent display to show image superimposed on near an object that exists behind the screen. We propose a display which shows image not on display surface but at a different image of depth. In this system, to show the image at behind the screen, display device is reflected on the transparent screen which incorporates a half mirror array. In this study, we use the mirror array as screen in order to locate the display device at an appropriate place. We optimize the surface of display device and angle of all mirrors so as to minimize the virtual image distortion. To confirm the practicality of the proposed method, we conducted a simulation. From the result, we confirmed the virtual image was able to display designated position.

Combination of tactile devices for data analytics

International audience Although ubiquitous data analysis is a promising approach, analyzing data in spreadsheets on tablets is a tedious task due to the limited size of the display and tactile vocabulary. In this article, we present the design and evaluation of new interaction techniques based on the combination of a tablet containing the data and a smartphone used as a mediator between the user and the tablet. To do this, we propose to use stacking gestures, i. e. to place a smartphone on top of a tablet. Stacking is an inexpensive, easy to implement, efficient and effective way to improve the analysis of data on tablets, increasing the vocabulary and broadening the display surface by using smartphones that are always available. We first explore stacking-based solutions to delimit the possible interaction vocabulary and present the manufacture of a conductive shell for smartphones. Then, we propose new techniques based on stacking to perform data analysis of a spreadsheet, i.e. the creation of pivot tables and their manipulation. We evaluate our stacking techniques against the tactile interactions provided by current mobile spreadsheet applications. Our studies reveal that some of our interaction techniques are 30% faster than touch to create pivot tables. Bien que l'analyse ubiquitaire de données soit une approche prometteuse, l'analyse des données dans des tableurs sur des tablettes est une tâche fastidieuse en raison de la taille limitée de l'affichage et du vocabulaire tactile. Dans cet article, nous présentons la conception et l'évaluation de nouvelles techniques d'interaction reposant sur la combinaison d'une tablette contenant les données et d'un smartphone utilisé comme médiateur entre l'utilisateur et la tablette. Pour ce faire, nous proposons d'utiliser des gestes de "stacking", c'est-à-dire de poser une arrête d'un smartphone sur l'écran de la tablette. Le stacking est un moyen peu coûteux, facile à mettre en oeuvre, efficace, et basé sur l'utilisation des smartphones toujours disponibles pour améliorer l'analyse des données sur des tablettes, en augmentant le vocabulaire utilisé et en élargissant la surface d'affichage. Nous explorons d'abord des solutions basées sur le stacking pour délimiter le vocabulaire d'interaction possible et présenter la fabrication d'une coque conductive pour smartphone. Ensuite, nous proposons de nouvelles techniques basées sur le stacking pour réaliser l'analyse de données d'un tableur, c'est-à-dire la création de tableaux croisés dynamiques et leur manipulation. Nous évaluons nos techniques de stacking par rapport aux interactions tactiles fournies par les applications de tableur mobiles actuelles. Nos études révèlent que certaines de nos techniques d'interaction sont 30% plus rapides que le toucher pour créer des tableaux croisés dynamiques.