Showing papers by "Patrick Vandewalle published in 2011"
TL;DR: If the experiments are performed on a large data set, the algorithm is compared to the state-of-the-art methods, the code and/or data are well documented and available online, the community will all benefit and make it easier to build upon each other's work.
Abstract: Reproducible research results become more and more an important issue as systems under investigation are growing permanently in complexity, and it becomes thus almost impossible to judge the accuracy of research results merely on the bare paper presentation.
152 citations
TL;DR: The major aspects of a content delivery chain based on the LDV format are discussed, and a multi-camera system, which is well suited for LDV compliant data capture, is presented and a transmission system based on currently available coding and transmission standards is presented.
Abstract: This paper discusses an approach to 3D-Television that is based on the Layered Depth Video (LDV) format. The LDV format contains explicit depth and occlusion information, allowing for the generation of novel viewpoints for stereoscopic and auto-stereoscopic multi-view displays. Thus, the format is effectively invariant to the display type and also allows the depth impression to be easily changed to best meet viewers' preferences for visual comfort. The major aspects of a content delivery chain based on the LDV format are discussed in this paper. The requirements placed on data acquisition are introduced, and a multi-camera system, which is well suited for LDV compliant data capture, is presented. Also discussed is the conversion of different input data streams, like standard stereo videos, multi-view data supplemented by depth data, and videos from wide baseline setups, to the LDV format. Moreover, the advantages of the LDV format in editing and mixing are examined. The paper also presents a transmission system based on currently available coding and transmission standards. Optimization of the bandwidth via different approaches to the compression of the LDV signal is analyzed, and the results of conducted experiments in this field are discussed. Finally, the aspects of perceptual human factors for the proper evaluation of 3D-TV services and the implemented LDV system are examined. This contribution reflects the efforts of the EU-funded project 3D4YOU to unify all aspects of 3D-TV production.
25 citations
Patent•
10 Jan 2011TL;DR: In this paper, a system for determining a position characteristic for an object in a room comprises an optically identifiable element (103) positioned on a background surface for a detection area of the room.
Abstract: A system for determining a position characteristic for an object in a room comprises an optically identifiable element (103) positioned on a background surface for a detection area of the room. A camera (101) is positioned across the detection area from the optically identifiable element (103) and captures an image comprising the detection area and the optically identifiable element (103). A detector (403) detects the optically identifiable element (103) in the image based on an optical property. An occlusion processor (405) determines an occlusion property for an occlusion of the optically identifiable element (103) in the image in response to the optical property. A position processor (407) determines a depth position in response to the occlusion property where, the depth position is indicative of a position of the object along the optical axis of the camera (101). The invention may for example allow presence detection and rough localization of a person in a room.
14 citations
Patent•
10 Jan 2011
TL;DR: In this article, a system for determining the caracteristique de position of an object dans a piece is presented, which comprends an element optiquement identifiable (103) place sur une surface d'arriere-plan for a zone de detection of the piece.
Abstract: La presente invention concerne un systeme permettant de determiner une caracteristique de position pour un objet dans une piece, qui comprend un element optiquement identifiable (103) place sur une surface d'arriere-plan pour une zone de detection de la piece. Selon l'invention, une camera (101) est placee de l'autre cote de la zone de detection par rapport a l'element optiquement identifiable (103) et capture une image qui comprend la zone de detection et l'element optiquement identifiable (103). Un detecteur (403) detecte l'element optiquement identifiable (103) dans l'image en fonction d'une propriete optique. Un processeur d'occlusion (405) determine une propriete d'occlusion pour une occlusion de l'element optiquement identifiable (103) dans l'image en reponse a la propriete optique. Un processeur de position (407) determine une position de profondeur en reponse a la propriete d'occlusion, la position de profondeur indiquant une position de l'objet le long de l'axe optique de la camera (101). L'invention peut par exemple permettre la detection de presence et la localisation approximative d'une personne dans une piece.
1 citations