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Interdigital Vc Holdings, Inc.

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Interdigital Madison Patent Holdings, Sas

Interdigital Madison Patent Holdings

Christel Chamaret

Fabrice Urban

Jean-Claude Chevet

Philippe Guillotel

Olivier Le Meur

Yoann Baveye

Edouard Francois

Philippe Bordes

Julien Fleureau

Erik Reinhard

Tania Pouli

Alexandre Ninassi

Phi Bang Nguyen

Laurent Blonde

Guillaume Boisson

Jurgen Stauder

Patrick Lopez

Paul Kerbiriou

Christophe Chevance

Laurent Cauvin

Ronan Boitard

Claire-Helene Demarty

Thai Quan Huynh-Thu

Zoubida Ameur

Milos Radosavljevic

Dmitry Kuzovkin

Brice Follet

Clément Rousseau

A method and device for reducing power consumption of display devices proposes to reduce the total amount of light emitted in a perceptually indistinguishable manner based on the on the human visual sensitivity at the position of a pixel. The visibility of the processing can be made to remain provably below threshold, whereas other techniques may not be able to provide such proof. This is achieved by determining a minimum detectable modulation or a corresponding just-noticeable difference based on frequency intensity information for a pixel representative of how much there is of a set of frequencies at the pixel and a contrast sensitivity function representative of a model of human vision that predicts which contrasts at which frequencies are visible to the human eye. Pixel values may be reduced based on this minimum detectable modulation or just-noticeable difference. The contrast sensitivity function may be given by Barten's model and the frequency intensity information may be based on a hierarchical map built using a discrete wavelet transform or a continuous wavelet transform.

Pixel modification to reduce energy consumption of a display device

A method comprising: receiving at least one bitstream comprising encoded video data and a message corresponding to said encoded video data and decoding said message, said message comprising for each coding tool of a plurality of coding tools used for encoding the video data, information representative of an energy consumed by a device in charge of decoding and/or displaying the encoded video data induced by said coding tool and information representative of an impact of said coding tool on a quality of the encoded video data after decoding; using the information comprised in the decoded message to select at least one coding tool of the plurality of coding tools to deactivate or modify; and, decoding the encoded video data by using a decoding process wherein the selected coding tools are deactivated or modified.

Metadata allowing decoding and displaying processes energy and quality control

An adaptive color grade interpolation method is disclosed. The method comprises interpolating from a first color graded version of a picture adapted to first viewing conditions and a second color graded version of said picture different from the first color graded version and adapted to second viewing conditions in order to obtain a third color graded version of the picture adapted to third viewing conditions wherein said interpolating is obtained from said first color graded version, a first mapped color version of said first color graded version adapted to said third viewing conditions and to a second mapped color version of said first color graded version adapted to said second viewing conditions such that said first color graded version and second mapped color version are interpolated into said first mapped color version.

Adaptive color grade interpolation method and device

Systems and methods of re-coloring digital images are disclosed. A system including a processor and a memory can execute stored instructions to obtain luminance information of a first image, e.g., an original grayscale image, and obtain color information of a second image, e.g., a colorized image of the original grayscale image. Multiple segmented image regions can be determined based on the luminance information of the first image. A color seed for each segmented image region can be determined based on the color information of the second image. A third image, e.g., a re-colored image, can be determined based on diffusing the color seeds of the segmented image regions.

Methods and systems for color processing of digital images

A method and device for eye gaze estimation with regard to a sequence of images. The method comprises receiving a sequence of first video images and a corresponding sequence of first eye images of a user watching at the first video images; determining first saliency maps associated with at least a part of the first video images; estimating associated first gaze points from the first saliency maps associated with the video images associated with the first eye images; storing of pairs of first eye images/first gaze points in a database; for a new eye image, called second eye image, estimating an associated second gaze point from the estimated first gaze points and from a second saliency map associated with a second video image associated with the second eye image; storing the second eye image and its associated second gaze point in the database.

Method for calibration free gaze tracking using low cost camera

A method for processing a picture comprising at least one face is provided. The method comprises: &#x2014;obtaining (S) a cropping window in the picture; &#x2014;processing (S) the picture by cropping the picture part delimited by the cropping window; wherein the method further comprises detecting (S) the at least one face, determining (S) a weight for the detected at least one face and modifying (S) the position of the cropping window in the picture based on the weight, wherein the weight is determined at least based on the size of the corresponding detected face.

Method and device for processing a picture

A method is described for inverse tone mapping the luminance (Y(p)) of each pixel (p) of at least one image (I) of this sequence into an expanded luminance Y(p)=Y(p). Y(p), wherein E(p) is an expansion exponent value extracted from an expansion exponent map built from low pass motion-compensated temporal filtering of said image (I) and wherein Y(p) is a luminance-enhancement value extracted from a luminance-enhancement map built from high pass motion-compensated temporal filtering of said image (I).

Method for inverse tone mapping of a sequence of images

In an image processing method to display a stereoscopic image on a target screen, a disparity information () is associated with the stereoscopic image and is adapted for the display of the stereoscopic image on an original screen, the size of the original screen being different from the size of the target screen, the stereoscopic image comprising a first image () and a second image (). In order to optimize the disparity of the stereoscopic image, the method comprises selecting a part of said first image according to at least one property associated with the first image; calculating a target disparity information associated with the selected part of the image according to the viewing conditions associated with the target screen and the original disparity information associated with the selected part of the first image.

Method for reducing the size of a stereoscopic image

The invention relates to a method of gaze estimation. As to determine the position of the gaze without calibrating the system used for determining the gaze, the method comprises: detecting at least a location of the center of at least an eye on at least an eye image of a viewer watching at least a video image displayed on a screen; determining at least a first position of the gaze of the viewer on the screen by using the at least a detected location of the center of the at least an eye and a mapping function based on center-bias property of human gaze distribution. The invention also relates to a device configured for estimating the gaze.

Method and device for calibration-free gaze estimation

A method for processing a picture is disclosed. The method according to the invention comprises:

Method and device for mapping colors in a picture using templates of harmonious colors

Method comprising, for each pixel, obtaining a pixel expansion exponent value (E'(p)) by low pass filtering luminance values of colors of pixels in its spatial neighborhood, obtaining a pixel luminance-enhancement value (Y(p)) by extraction of high frequencies of luminance values of colors of pixels in its spatial neighborhood, and then inverse tone mapping the luminance (Y(p)) according to the equation Y(p)=Y(p)&#xd7;[Y(p)].

Method for inverse tone mapping of an image

A method for processing a video is disclosed. The method comprises:

Method and device for processing a video

A method for harmonizing colors of an original image is disclosed. The method comprises:

Method for harmonizing colors, corresponding computer program and device

A method of cropping a 3D content comprising at least a first view and a second view is disclosed that comprises:

Method and device for retargeting a 3D content

The present invention pertains to a method for selecting a version of a document. The user inputs an identifier of a document at the level of his receiver connected to at least one communication network, and initiates a search request to receive versions of at least one part of this document. The receiver then receives a plurality of versions of the said document. Each version received is analysed by a plurality of evaluation modules so as to calculate an evaluation value for each version received according to a predetermined criterion. The receiver selects for each of the evaluation modules a version of the document having the best evaluation in respect of this criterion, and displays the identifiers of versions having the best evaluations according to each criterion. The user can then easily select the version for reproduction thereof which best meets a criterion. The invention also relates to a receiver implementing the said method.

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Chantepie, France

Christel Chamaret