Abstract: The present disclosure relates to a method for generating an image, including obtaining a source image, at least one pixel of the source image being a useful pixel and at least one distinct pixel of the source image being a non-useful pixel; and a key information indicating whether each pixel of the source image is a useful pixel or a non-useful pixel; applying a feathering processing on at least one pixel of the source image, called a border pixel, a border pixel being a non-useful pixel having at least one first useful neighbor pixel and at least one second non-useful distinct neighbor pixel, the feathering processing generating a modified image presenting a smooth transition between values of the first neighbor pixel and values of the second neighbor pixel.

Abstract: A sequence of point clouds is encoded as a video by an encoder and transmitted to a decoder which retrieves the sequence of point clouds. Visible points of a point cloud are iteratively projected on a projection map to determine a patch data item list. Image patches are generated and packed into a picture. Pictures and associated patch data item list are encoded in a stream. The decoding method decodes pictures and associated patch data item lists. Pixels of image patches comprised in pictures are un-projected according to data stored in associated patches. The methods have the advantage of encoding every point of point clouds in a manner avoiding artifacts and allowing decoding at video frame rate.

Abstract: A sequence of three-dimension scenes is encoded as a video by an encoder and transmitted to a decoder which retrieves the sequence of 3D scenes. Points of a 3D scene visible from a determined point of view are encoded as a color image in a first track of the stream in order to be decodable independently from other tracks of the stream. The color image is compatible with a three degrees of freedom rendering. Depth information and depth and color of residual points of the scene are encoded in separate tracks of the stream and are decoded only in case the decoder is configured to decode the scene for a volumetric rendering.

Abstract: An encoder and encoding method map haptic effects for various haptic channels to a plurality of areas of a body model. The haptic channels represent temperature, vibration, or similar such effects for use by haptic actuators, for example. Each channel comprises signals to represent a timestamp, face locations and identifiers, and spatial and temporal resolution values to control effect resolutions for various parts of the body for a particular effect controlled by that channel. The haptic channels are multiplexed together to form a composite signal that can control various effects to a plurality of body locations.

Abstract: A sequence of point clouds is encoded as a video by an encoder and transmitted to a decoder which retrieves the sequence of point clouds. Visible points of a point cloud are iteratively projected on projection maps according to at least two centers of projection, to determine a patch data item lists. One of the centers of projection is selected and corresponding image patches are generated and packed into a picture. Pictures and associated patch data item list are encoded in a stream. The decoding method decodes pictures and associated patch data item lists. Pixels of image patches comprised in pictures are un-projected according to data stored in associated patches. The methods have the advantage of encoding every point of point clouds in a manner avoiding artifacts and allowing decoding at video frame rate.

Abstract: The present disclosure relates to a method for reproducing an item of video content filmed using a camera. An item of video content composed of sequences is developed and enhanced by commands applied to the camera at the time of filming. With a view to reproduction, the video content is divided into sequences. The commands applied to the camera are extracted for each sequence and make it possible to calculate at least one haptic actuator control parameter associated with this sequence. At the time of the reproduction of a sequence of the video content, at least one control parameter thus calculated controls at least one haptic actuator. In this way, the spectator perceives stimuli making it possible to enhance his perception of the video document during the reproduction. Advantageously, the player able to reproduce the enhanced content determines a cinematographic effect for a set of sequences from commands applied to the camera.

Abstract: Method and device for generating a stream of data representative of a 3D point cloud. The 3D point cloud is partitioned into a plurality of 3D elementary parts. A set of two-dimensional 2D parametrizations is determined, each 2D parametrization representing one 3D part of the point cloud with a set of parameters. Each 3D part is represented as a 2D pixel image. A depth map and a color map are determined as a first patch atlas and a second patch atlas. A data stream is generated by combining and/or coding the parameters of the 2D parametrization, the first patch atlas, the second patch atlas and mapping information that links each 2D parametrization with its associated depth map and color map in respectively the first and second patch atlas.

Abstract: A position and an orientation of a user in a virtual 3D scene is determined (22), an action is executed (24)in the virtual 3D scene for the user in function of the position and orientation of the user with respect to a given place, and a result of the action is outputted (25). For at least one event in the scene consisting in a presence of at least one determined virtual content, metadata linking the event(s) and at least one place of the event(s) are obtained (21). A given event and the given place linked by those metadata are determined (241), in function of the above position and orientation and of a relationship between that event and a user profile of the user. The action regarding the determined given event and place is executed.

Abstract: The present disclosure relates to method for embedding key information in an image, the method comprising reserving a range of DMZ values, in a predetermined range of 2N values used for storing useful data in the image, the reserved range being used for storing a key information associated with at least one coordinates in the image, with N>0 and DMZ<<2N.

Abstract: The invention relates to a method for generating haptic coefficients associated with an audiovisual document. Initially, data is extracted from an audio and/or video track and is used to calculate at least one first group of haptic coefficients from an autoregressive model applied to the read data. These haptic coefficients are designed to program a filter supplying at the output the control parameters for controlling at least one haptic actuator. Then, a “haptic” sequence of the audiovisual document is determined and calculated haptic parameters are associated with the determined sequence. In this manner, the haptic parameters enabling the control of one or more actuators are easily calculated and easily reproducible. Advantageously, the data used for the calculation is extracted from the selected sequence.

Abstract: A method of encoding a packet of data representative of a haptic effect, the haptic affect being associated with an immersive content is described. The method includes adding a first information in the packet, the first information being representative of a dependency of said haptic effect with regard to a position of a body model in relation to the immersive content. Thereafter, a second information in the packet is added, the second information being representative of at least a first part of the body model targeted by the haptic effect. A method for decoding the packet and corresponding devices are also described.

Abstract: Method and device for generating a stream from image(s) of an object, comprising: obtaining data associated with points of a point cloud representing at least a part of the object; obtaining a parametric surface according to at least a geometric characteristic associated with the at least a part of the object and pose information of an acquisition device used to acquire the at least one image; obtaining a height map and one or more texture maps associated with the parametric surface; generating the stream by combining together a first syntax element relative to the at least a parameter, a second syntax element relative to the height map, a third syntax element relative to the at least one texture map and a fourth syntax element relative to a position of the acquisition device. The disclosure relates further to a method and device for rendering an image of the object from the stream thus obtained.

Abstract: An encoder and encoding method map haptic effects for various haptic channels to a plurality of areas of a body model. The haptic channels represent temperature, vibration, or similar such effects for use by haptic actuators, for example. Each channel comprises signals to represent a timestamp, face locations and identifiers, and spatial and temporal resolution values to control effect resolutions for various parts of the body for a particular effect controlled by that channel. The haptic channels are multiplexed together to form a composite signal that can control various effects to a plurality of body locations.

Abstract: A method for processing a first part of an immersive video content, for example the part to be displayed, on a client device. As to incite a user to look toward a reference part in the immersive video content, the method comprises determining a distance between the first part or subparts of the first part and at least a reference part, and processing a visually degraded version of the first part or its subparts, the greater the distance, the higher the level of the visual degradation.

Abstract: The present disclosure relates to methods, apparatus or systems for determining a fmal pose (21) of a rendering device. An initial pose is associated with the rendering device. A module (25) determines an intermediate pose (26) according to data from absolute pose sensors (23) and/or differential pose sensors (22). A module (27) determines the final pose (21) according to, first, a difference between the intermediate pose (26) and the initial pose information, second, the data from differential pose sensors (22), and third an evaluation of the visual perception of movements for current images (24) displayed on the rendering device.

Abstract: A method and device for compositing and/or transmitting a first image to a first display device, the method comprising receiving a second image representative of a scene, the scene comprising a second display device displaying a third image; receiving the third image; obtaining a first information representative of pose of the second display device with respect to the scene; distorting the third image according to the first information; generating the first image by combining the second image and the distorted third image using the obtained first information; and transmitting data representative of the first image.

Abstract: The present disclosure relates to methods, apparatus or systems for formatting of backward compatible immersive video streams. At least one legacy rectangular video is captured from an immersive video obtained from a source (82). A set of camera control data are used to determine which parts of the immersive video will constitute legacy videos (84). These part are removed from the immersive video (83) and every prepared videos are packaged in a stream (85). The structure from the stream is a container. Information data about the location and size of removed parts may be added in the stream.

Abstract: A method, apparatus and system for synchronizing audiovisual content with inertial outputs for content reproduced on a mobile content device include, in response to a vibration of the mobile content device, receiving a recorded audio signal and a corresponding recorded inertial signal generated by the vibration. The recorded signals are each processed to determine a timestamp for a corresponding peak in each of the recorded signals. A time distance between the timestamp of the recorded audio signal and the timestamp of the recorded inertial signal is determine and inertial signals for content reproduced on the mobile content device are shifted by an amount of time equal to the determined time distance between the timestamp of the recorded audio signal and the timestamp of the recorded inertial signal.

Abstract: A method and device for obtaining a sound, wherein an information representative of a speed of a first object moving on a first surface is obtained. The obtained speed information is used with one or more reference sounds to obtain the sound. The one or more reference sounds are associated with a determined speed of displacement of a second object moving on a second surface, the first surface being different from the second surface.

Abstract: The present disclosure relates to methods, devices or streams for encoding, transmitting and decoding two-dimension point clouds. When encoding point clouds as frames, a large number of pixels are not used. A dense mapping operator optimizes the use of pixels but requires a lot of data to be encoded in the stream and its inverse operator is difficult to compute. A simplified mapping operator is generated according to a dense mapping operator and is stored as matrices of two-dimension coordinates representative of an unfolded grid which requires low space in the stream. The inverse operator is easy to generate according to the unfolded grid.