InterDigital CE Patent Holdings

To represent a 3D scene, the MPI format uses a set of fronto-parallel planes. Different from MPI, the current MIV standard accepts a 3D scene represented as sequence input pairs of texture and depth pictures as input. To enable transmission of an MPI cube via the MIV-V 3 C standard, in one embodiment, an MPI cube is divided into empty regions and local MPI partitions that contain 3D objects. Each partition in the MPI cube can be projected to one or more patches. For a patch, the geometry is generated as well as the texture attribute and alpha attributes, and the alpha attributes may be represented as a peak and a width of an impulse. In another embodiment, an MPI RGBA layer of the MPI is cut into sub-images. Each sub-image may correspond to a patch, and the RGB and alpha information of the sub-image are assigned to the patch.

There are several types of plenoptic devices having their proprietary file format. At present there is no standard supporting the acquisition and transmission of multi-dimensional information for an exhaustive over-view of the different parameters upon which a light-field depends. As such acquired light-field data for different cameras have a diversity of formats. The notion of pixel beam, which represents a volume occupied by a set of rays of light in an object space of an optical system of a camera is thus introduced. The method according to the invention enables to provide data representative of a collection of pixel beams describing a first optical system that is agnostic since these data are obtained by imaging the collection of pixel beams through a second optical system. Such data representative of a collection of pixel beams enable the generation of parameterized output images from which post-processing.

A method ( 30 ) and system ( 10 ) for controlling wireless local area network (WLAN) user quality in a multi-access point environment is provided. In order to ensure good quality of service/user experience in a multi-access point Wi-Fi™ setup in which a user roams with a station ( 14 ), the access points ( 11, 12 ) continuously or at intervals assess the wireless environment's quality and report to a control entity ( 13 ). The control entity ( 13 ) determines, from the assessment data, alternative target access points ( 11, 12 ) that could be used in case the link quality of a current connection between an access point ( 11 ) and the station ( 14 ) falls below a predefined value. The control entity ( 13 ) then instructs the access point ( 11 ) to actively disconnect the station ( 14 ) and selects a new target access point ( 12 ) to accept the stations ( 14 ) connection request.

A device includes at least one first sensor and at least one second sensor for capturing first image data, the at least one first and second sensors being rectangular and arranged orthogonal to the at least one first rectangular sensor, and at least one hardware processor configured to cause the at least one first and second sensors, respectively, the first image data and the second image data at least substantially simultaneously, and at least one of display simultaneously data from the first image data and data from the second image data as a cross-shaped image or store together data from the first image data and data from the second image data as a cross-shaped image. The resulting first and second image data can be stored in a single file in memory. The at least one hardware processor can be processed to remove redundancies between the image data. The device can also extract from the first and second image data, image data corresponding to a rectangle parallel with an horizon.

Localization of a user device in a mixed reality environment in which the user device obtains at least one keyframe from a server, which can reside on the user device, displays at least one of the keyframes on a screen, captures by a camera an image of the environment, and obtains a localization result based on at least one feature of at least one keyframe and the image.

An optically-transparent device ( 100 ) is disclosed which comprises a main part ( 10 ) of dielectric material having a refractive index n 2 , said device being configured for forming a field intensity distribution in a near zone of said device from electromagnetic waves incidentally illuminating said device, when said device is embedded into a dielectric material having a refractive index n 1 lower than said refractive index n 2 . Said device ( 100 ) further comprises at least one insert ( 11 ) of dielectric material having a refractive index n 3 higher than said refractive index n 2 , said at least one insert being at least partly inserted into said main part, said refractive index n 1 being different from said refractive index n 3 , and wherein Formula (I) with W 2 being a half width of said insert and Formula (II), Formula (III) with W 1 being a half width of said main part and Formula (IV), with λ being the wavelength of the electromagnetic wave propagating in the dielectric material having refractive index n 1 .

A device and a method for outputting video content for display on a display. At least one processor displays a first video content on the display, receives a second video content to display, obtains a first luminance value for the first video content, extracts a second luminance value from the second video content, adjusts a luminance of a frame of the second video content based on the first and second luminance values and outputs the frame of the second video content for display on the display. The video content can comprise frames and a luminance value can be equal to an average frame light level for the most recent L frames of the corresponding video content. In case a luminance value is unavailable, a Maximum Frame Average Light Levels of the first video content and the second video content can be used instead.

It is proposed an optical device for delivering a polychromatic image to an eye box being an area positioned in front of an eye of a user wearing said optical device. The optical device is remarkable in that it comprises: • a light-engine for delivering said polychromatic image, said light engine being able to generate n different monochromatic light image beams [C 1 , . . . , C i , . . . , C n] , whom combination corresponds to said polychromatic image, each monochromatic light image C j being associated with a wavelength Ay, and wherein A i+1 >A £ for all the i E [1, n], and wherein the monochromatic light image beams C j is in a transverse electric mode if j is odd, and the monochromatic light image beams C j is in a transverse magnetic mode if j is even; • n-waveguide elements ( 502, 503, 504 ) that are stack on each other, n being an integer greater or equal to three, each waveguide element, except the one closer to the eye of a user, comprising a diffraction grating that can deviate only one of said n monochromatic light image in the waveguide element by total internal reflection, a first output that delivers deviated light toward said eye box, and a second output that delivers non-deviated light by a waveguide element to a subsequent waveguide element, wherein said second output comprising an achromatic half-wave plate (506, 507), and wherein the waveguide element that is closer to the eye of the user comprises also a diffraction grating that can deviate only one of said n monochromatic light image in the waveguide element by total internal reflection, and an output that delivers deviated light toward said eye box, wherein each diffraction grating of said optical device is associated with a different wavelength, and, wherein the arrangement order of said n-waveguide is done according to the wavelength value, from the smallest to the highest, the smallest waveguide element being positioned closer to the light engine.

A method of sharing and a method of presenting virtual content in a mixed reality scene rendered on at least two user devices having different viewing position and/or orientation onto the mixed reality scene and corresponding apparatus are described. At a first user device, a user is enabled to select a virtual content to be shared and a second user device with whom the virtual content is to be shared. Information related to the virtual content to be shared is provided, wherein the provided information comprises the 3D position of the virtual content to be shared. The information is received by the second user device and the shared virtual content is rendered with regard to the viewing position and/or orientation of the second user device onto the mixed reality scene.

During a streaming session of tile based immersive video, upon request to switch from at a current tile segment associated with a current tile to a new tile segment associated with a new tile at a reference time, an encoder ( 300 ) is providing to generate one or more complementary frames of the new tile segment allowing a decoding, by a requesting player, of the new tile segment from the reference time.