3D-XV (3-Dimensional XML Visualizer) is an interactive graphical interface for accessing large st... more 3D-XV (3-Dimensional XML Visualizer) is an interactive graphical interface for accessing large structured documents. It relies on a geometrical model that combines a sequential organization and a hierarchical structure. In the overview mode, the user can access information through natural language queries. In the browsing mode, the content of the paragraphs is displayed in a moving walkway fashion. The model is compared with previous studies on document visualization for passage retrieval. The merits of interactive 3D manipulation through the intuitively oriented 3D-XV geometrical model are outlined.
ENIGMES (Experimentation de Nouvelles Interfaces Gestuelles Musicales et Sonores) est un projet d... more ENIGMES (Experimentation de Nouvelles Interfaces Gestuelles Musicales et Sonores) est un projet de recherche et d’experimentation pedagogique interdisciplinaire developpe a l’ENSCI (Ecole Nationale Superieure de Creation Industrielle) en 2006-2007 dans le cadre du studio de creation sonore de Roland Cahen. Les champs de competence concernes sont : conception d’usage, graphisme, musique, informatique Le projet concerne des etudiants, enseignants, chercheurs et artistes. Le theme en est la partition navigable (ou partition instrument) soit une approche interdisciplinaire de la composition et du jeu musical electroacoustique tirant parti des possibilites offertes par les outils numeriques. La recherche musicale portee sur des problematiques d’usage dans un cadre pedagogique. Quatre metaphores d’usage ont ete definies et developpees : deux concernant les interfaces gestuelles et deux les modalites de navigation sonore en 2 et 3D.
Projector-camera systems are designed to improve the projection quality by comparing original ima... more Projector-camera systems are designed to improve the projection quality by comparing original images with their captured projections, which is usually complicated due to high photometric and geometric variations. Many research works address this problem using their own test data which makes it extremely difficult to compare different proposals. This paper has two main contributions. Firstly, we introduce a new database of acquired image projections (DAcImPro) that, covering photometric and geometric conditions and providing data for ground-truth computation, can serve to evaluate different algorithms in projector-camera systems. Secondly, a new object recognition scenario from acquired projections is presented, which could be of a great interest in such domains, as home video projections and public presentations. We show that the task is more challenging than the classical recognition problem and thus requires additional pre-processing, such as color compensation or projection area selection.
In this paper, a novel approach that allows color compensated projection on an arbitrary surface ... more In this paper, a novel approach that allows color compensated projection on an arbitrary surface is presented. Assuming that the geometry of the surface is known, this method can be used in dynamic environments, where the surface color is not static. A simple calibration process is performed offline and only a single input image under reference illumination is sufficient for the estimation of the compensation. The system can recover the reflectance of the surface pixel-wise and provide an accurate photometric compensation to minimize the visibility of the projection surface. The color matching between the desired appearance of the projected image and the projection on the surface is performed in the device-independent color space CIE 1931 XYZ. The results of the evaluation confirm that this method provides a robust and accurate compensation even for surfaces with saturated colors and high spatial frequency patterns. This promising method can be the cornerstone of a real time projector-camera system for dynamic scenes.
2014 IEEE International Conference on Image Processing (ICIP), 2014
Despite numerous efforts on blur measurement of partially blurred images, there still lacks an ef... more Despite numerous efforts on blur measurement of partially blurred images, there still lacks an effective blur measure that is both pixel-wise and locally sharp consistent. The paper proposes a novel method with two contributions to overcome this limitation: 1) A new pixel-based blur metric, Multi-resolution Singular Value (MSV), which leverages the average singular value of high frequency bands to measure the blur of each pixel, and 2) a locally continuous strategy, maximum-likelihood estimation (MLE) based refinement, that ensures local continuity by imposing the local sharp consistency on pixel blur in a local correcting process. Experimental results show that our method is effective to smoothly measure the partially blurred images without local discontinuity.
International Journal of Arts and Technology, 2014
ABSTRACT Genius Loci is an art installation and a theater play based on audiovisual augmented rea... more ABSTRACT Genius Loci is an art installation and a theater play based on audiovisual augmented reality combined with contemporary writings and religious texts. The scenography takes place in a disused church and begins with a dialog between a contemporary author in residence and the ghost of a Carthusian monk during which the graphical rendering of historical hypotheses is progressively revealed. In the second part, the silhouette of the monk emerges from contemporary visuals that combine fluid and animated graphical patterns anchored to the church geometry. After saying a psalm, the monk vanishes in an apocalyptic audiovisual crescendo. Both historical and contemporary visuals are animated spatial augmented reality installations based on 3D scans of the church enriched with historical furniture and ornamentation. This study shows how digitalised heritage can be used for situated performance, and offers insights on artistic and technological issues that can ensure a better immersion of the audience through enhanced believability and empathy with the performance.
3D-XV (3-Dimensional XML Visualizer) is an interactive graphical interface for accessing large st... more 3D-XV (3-Dimensional XML Visualizer) is an interactive graphical interface for accessing large structured documents. It relies on a geometrical model that combines a sequential organization and a hierarchical structure. In the overview mode, the user can access information through natural language queries. In the browsing mode, the content of the paragraphs is displayed in a moving walkway fashion. The model is compared with previous studies on document visualization for passage retrieval. The merits of interactive 3D manipulation through the intuitively oriented 3D-XV geometrical model are outlined.
ENIGMES (Experimentation de Nouvelles Interfaces Gestuelles Musicales et Sonores) est un projet d... more ENIGMES (Experimentation de Nouvelles Interfaces Gestuelles Musicales et Sonores) est un projet de recherche et d’experimentation pedagogique interdisciplinaire developpe a l’ENSCI (Ecole Nationale Superieure de Creation Industrielle) en 2006-2007 dans le cadre du studio de creation sonore de Roland Cahen. Les champs de competence concernes sont : conception d’usage, graphisme, musique, informatique Le projet concerne des etudiants, enseignants, chercheurs et artistes. Le theme en est la partition navigable (ou partition instrument) soit une approche interdisciplinaire de la composition et du jeu musical electroacoustique tirant parti des possibilites offertes par les outils numeriques. La recherche musicale portee sur des problematiques d’usage dans un cadre pedagogique. Quatre metaphores d’usage ont ete definies et developpees : deux concernant les interfaces gestuelles et deux les modalites de navigation sonore en 2 et 3D.
Projector-camera systems are designed to improve the projection quality by comparing original ima... more Projector-camera systems are designed to improve the projection quality by comparing original images with their captured projections, which is usually complicated due to high photometric and geometric variations. Many research works address this problem using their own test data which makes it extremely difficult to compare different proposals. This paper has two main contributions. Firstly, we introduce a new database of acquired image projections (DAcImPro) that, covering photometric and geometric conditions and providing data for ground-truth computation, can serve to evaluate different algorithms in projector-camera systems. Secondly, a new object recognition scenario from acquired projections is presented, which could be of a great interest in such domains, as home video projections and public presentations. We show that the task is more challenging than the classical recognition problem and thus requires additional pre-processing, such as color compensation or projection area selection.
In this paper, a novel approach that allows color compensated projection on an arbitrary surface ... more In this paper, a novel approach that allows color compensated projection on an arbitrary surface is presented. Assuming that the geometry of the surface is known, this method can be used in dynamic environments, where the surface color is not static. A simple calibration process is performed offline and only a single input image under reference illumination is sufficient for the estimation of the compensation. The system can recover the reflectance of the surface pixel-wise and provide an accurate photometric compensation to minimize the visibility of the projection surface. The color matching between the desired appearance of the projected image and the projection on the surface is performed in the device-independent color space CIE 1931 XYZ. The results of the evaluation confirm that this method provides a robust and accurate compensation even for surfaces with saturated colors and high spatial frequency patterns. This promising method can be the cornerstone of a real time projector-camera system for dynamic scenes.
2014 IEEE International Conference on Image Processing (ICIP), 2014
Despite numerous efforts on blur measurement of partially blurred images, there still lacks an ef... more Despite numerous efforts on blur measurement of partially blurred images, there still lacks an effective blur measure that is both pixel-wise and locally sharp consistent. The paper proposes a novel method with two contributions to overcome this limitation: 1) A new pixel-based blur metric, Multi-resolution Singular Value (MSV), which leverages the average singular value of high frequency bands to measure the blur of each pixel, and 2) a locally continuous strategy, maximum-likelihood estimation (MLE) based refinement, that ensures local continuity by imposing the local sharp consistency on pixel blur in a local correcting process. Experimental results show that our method is effective to smoothly measure the partially blurred images without local discontinuity.
International Journal of Arts and Technology, 2014
ABSTRACT Genius Loci is an art installation and a theater play based on audiovisual augmented rea... more ABSTRACT Genius Loci is an art installation and a theater play based on audiovisual augmented reality combined with contemporary writings and religious texts. The scenography takes place in a disused church and begins with a dialog between a contemporary author in residence and the ghost of a Carthusian monk during which the graphical rendering of historical hypotheses is progressively revealed. In the second part, the silhouette of the monk emerges from contemporary visuals that combine fluid and animated graphical patterns anchored to the church geometry. After saying a psalm, the monk vanishes in an apocalyptic audiovisual crescendo. Both historical and contemporary visuals are animated spatial augmented reality installations based on 3D scans of the church enriched with historical furniture and ornamentation. This study shows how digitalised heritage can be used for situated performance, and offers insights on artistic and technological issues that can ensure a better immersion of the audience through enhanced believability and empathy with the performance.
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Papers by Christian Jacquemin