Alcatel Lucent

Maarten Aerts

Donny G Tytgat

Sammy Lievens

Patrice Rondao Alface

Jean-Francois Macq

Erwin Six

Vinay Namboodiri

Erwin Alfons Constant Six

Donny Tytgat

Jean-François Macq

The present invention relates to a method, system and related devices for navigating between navigation points of a 3-Dimensional space where said 3-dimensional space comprises a plurality of navigation points. The method according to the present invention comprises the steps of detecting a current viewpoint rotation angle, further determining a degree of agreement of said current viewpoint rotation angle with a navigation point of said plurality of navigation points and subsequently activating a timing mechanism of the viewpoint activation, said timing mechanism comprising a delay for activating said timing mechanism of the viewpoint activation and a duration of an activation period of said timing mechanism at determining a certain degree of agreement of said current viewpoint rotation angle with a navigation point of said plurality of navigation points. The method further comprises the step of determining a degree of agreement of a portion of a viewpoint rotation angle trace with a viewpoint rotation model and adapting said at least one of said delay for activating said timing mechanism of said viewpoint activation and said duration of said activation period of said timing mechanism based on at least one of said degree of agreement of said current viewpoint rotation angle with a navigation point of said plurality of navigation points and said degree of agreement of said portion of said viewpoint rotation angle trace with said viewpoint rotation model.

Method for navigating between navigation points of a 3-dimensional space, a related system and a related device

A system for making available at an end-user a media file, from a media provider comprising a media file patch related to at least one object, the system comprising: an encoding module at the media provider configured for determining at least one representation which resembles the media file patch, by comparing the media file patch with representations of said at least one object, and for including at least one identification corresponding with said representation in a skeleton file; a storage medium storing a dictionary including the representations of the at least one object at of the end-user and an intermediate node between the media provider and/or the end-user; a decoding module configured for decoding the skeleton file using the identification for looking up the corresponding representation in the dictionary of the storage medium and for rendering the media file patch based on the looked-up corresponding representation.

Efficient and scalable caching and representation of media with cross-similarities

An encoder for encoding a video signal, comprising a video modelling module configured for determining a plurality of video modelling parameters for a plurality of video locations on a spatiotemporal grid of said video signal, said spatiotemporal grid comprising at least two spatial dimensions and a time dimension, each video modelling parameter being adapted for allowing a pre-determined video model to at least approximately reconstruct its video location, a video segmentation module configured for segmenting said video signal into a plurality of spatiotemporal video regions, based on said video modelling parameters and a vectorisation module configured for vectorising spatiotemporal surfaces of said spatiotemporal video regions; and wherein said encoder is configured for encoding said video signal based on at least a subset of said determined plurality of video modelling parameters and based on said vectorised spatiotemporal surfaces, wherein said subset is determined taking into account said spatiotemporal video regions.

Encoder, decoder, system and methods for video coding

Method for capturing an environment with objects, using a 3D camera, wherein the images of the cameras captured at different moments in time are used to generate 3D models, and wherein accuracy values are assigned to segments of the models allowing efficient refining of the models using the accuracy values.

Capturing an environment with objects

A method and device for determining at least one set of matching attributes between a plurality of images is disclosed. Two dimensional images are projected to a three dimensional space then searched for matching attributes. Searching for corresponding attributes is much easier and computationally less intensive in the 3D space compared to a search in the 2D space. The method includes steps of projecting at least part of the images of said plurality to a 3-dimensional space resulting in a plurality of 3-D projected images (image_3D, image_3D), searching for at least one corresponding set of elements within the 3D projected images of the plurality of 3-D projected images, and calculating back said corresponding elements within the original images of the plurality and providing said corresponding elements within said original images as said at least one set of matched attributes.

Method and arrangement for improved image matching

A method for constructing an image model (M; M) from at least one image data input (IV; IV-IVn), comprises the steps of, in an iterative way,

Method and arrangement for image model construction

A method for determining calibration data for at least two cameras (camera, camera) in a multi view position, includes a step of determining respective parameters ((h, . . . , h), (h, . . . , h)) for identifying at least one respective homographic transformation on respective images (image,image) taken by said cameras of a same scene, by performing respective geometry analyses on said respective images (image, image), a step of performing at least one respective combined homographic transformation/feature detection step on said respective images thereby obtaining respective sets (feature set, feature set) of features on respective transformed images, such that said calibration data are obtained from matches (m, . . . , m) determined between said respective sets of features.

Method and arrangement for multi-camera calibration

Method for adapting a 3D model (m) of an object, said method comprising the steps of

Method and arrangement for 3-dimensional image model adaptation

An exemplary method of providing a virtual representation includes determining a plurality of position constraints that correspond to physical positions of individuals relative to each other. A plurality of determined viewing constraints each correspond to a position of one of the individuals relative to a display used by that individual for viewing the virtual representation. Relative positions of virtual representations of the individuals in the virtual representation are determined to correspond to the determined position and viewing constraints.

Method and system for providing consistency between a virtual representation and corresponding physical spaces

A feedback-system for managing the position of a frontal camera provided on a portable multimedia device during video communication. The feedback-system comprises a camera image analyzer coupled to the frontal camera and adapted to detect and analyze the pose of a user facing the frontal camera, an optimal video estimator coupled to the camera image analyzer and adapted to calculate a 6-dimensional error-vector of the current position of the frontal camera with respect to an optimal position of the frontal camera, an intuitive feedback manager coupled to the optimal video estimator and adapted to generate a transformation matrix translating the error-vector into an error message for the image displayed on a screen of the portable multimedia device, the intuitive feedback manager being further coupled to the portable multimedia device which is adapted to use the error message for modifying the image displayed on the screen.

Feedback-system for managing video conferencing with a portable multimedia device comprising a frontal camera

The invention pertains to a method for segmenting an image from a sequence of video images into a foreground and a background, the image being composed of pixels, the method includes assigning an initial foreground probability to each of the pixels; assigning a set of probability propagation coefficients to each of the pixels; and applying a global optimizer to the initial foreground probabilities of the pixels to classify each of the pixels as a foreground pixel or a background pixel, to obtain a definitive foreground map; wherein the global optimizer classifies each processed pixel in function of the initial foreground probability of the processed pixel and the initial foreground probability of neighboring pixels, the relative weight of the initial foreground probability of neighboring pixels being determined by the probability propagation coefficients of the neighboring pixels.

Method and system for segmenting an image

An exemplary technique is provided for obtaining an improved depth precision for a stereo image of an object of interest. The technique includes imaging a first image of the object of interest from a first position, imaging a second image of the object of interest from a second position different from the first position, determining a rough estimate of a depth for the object of interest based on the first image and the second image, determining an improved set of imaging positions corresponding to an improved depth precision for the object of interest based on the rough estimate of the depth, imaging improved images from the improved set of imaging positions, and determining an improved depth based on the improved images.

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Antwerp, Belgium

Maarten Aerts