Patents by Inventor Guillaume Boisson

Guillaume Boisson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190197713
    Abstract: A method and an apparatus for depth-map estimation between at least two images respectively captured by at least two cameras are disclosed. Extrinsic and intrinsic parameters of the at least two cameras are obtained. Local spatial structure descriptors for each pixel of the at least two images are obtained by transforming a patch of pixels surrounding each pixel, and depth is obtained for at least one pixel of a first image among the at least two images, among at least two depth candidates, each depth candidate being associated with a corresponding pixel in a second image of the at least two images, said corresponding pixel in the second image being determined according to the obtained extrinsic and intrinsic parameters.
    Type: Application
    Filed: December 27, 2018
    Publication date: June 27, 2019
    Inventors: Frederic BABON, Benoit VANDAME, Guillaume BOISSON
  • Publication number: 20190191142
    Abstract: In one embodiment, it is proposed a method for obtaining at least one sub-aperture image being associated with one view, from raw light field data corresponding to recorded data by an array of pixels sensors positioned behind an array of micro-lenses in a light field camera, each of said pixel sensor recording a linear mixing of up to four different views. The method is remarkable in that it comprises applying a signal separation process on said raw data by using an inverse of a mixing matrix A, said mixing matrix comprising coefficients that convey weighting information of said up to four different views recorded by a pixel sensor.
    Type: Application
    Filed: July 20, 2017
    Publication date: June 20, 2019
    Inventors: Guillaume BOISSON, Mozhdeh SEIFI, Neus SABATER
  • Publication number: 20190174115
    Abstract: A method for reducing the parameters defining an acquired light field ray which enables only the colour associated with the light field ray to be stored instead of 4 light field co-ordinates (x,y,i,j) and its associated colour.
    Type: Application
    Filed: September 16, 2016
    Publication date: June 6, 2019
    Inventors: Valter DRAZIC, Guillaume BOISSON, Mozhdeh SEIFI
  • Publication number: 20190162978
    Abstract: There are several types of plenoptic devices having their proprietary file format. At present there is no standard supporting the acquisition and transmission of multidimensional 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 parametrized output images from which post-processing.
    Type: Application
    Filed: June 30, 2017
    Publication date: May 30, 2019
    Applicant: THOMSON LICENSING
    Inventors: Laurent BLONDE, Arno SCHUBERT, Guillaume BOISSON, Didier DOYEN, Paul KERBIRIOU, Olivier BURELLER, Valter DRAZIC
  • Publication number: 20190102867
    Abstract: The disclosure concerns a method for filtering spurious pixels in a depth-map. It is important to filter a depth-map to remove the spurious pixels. One issue when filtering spurious pixels, is to remove them while preserving the boundaries of the real details of the depth-map. A known approach to filter spurious pixels is to use a bi-lateral filter. However, the bi-lateral filter is not efficient to remove the spurious pixels. The proposed solution enables to remove spurious pixels in a depth-map while preserving the sharp edges of the depth-map and smoothing faint details or noise.
    Type: Application
    Filed: September 29, 2018
    Publication date: April 4, 2019
    Inventors: Benoit VANDAME, Neus SABATER, Guillaume BOISSON
  • Publication number: 20180316935
    Abstract: A method for encoding a plenoptic image divided into blocks is disclosed. The method comprises: —encoding (S120) a block in a central region of the plenoptic image, called central block, without spatial prediction; and—predictively encoding (S130) blocks immediately surrounding said central block by spatially interleaving spatial unidirectional prediction and spatial bi-directional prediction.
    Type: Application
    Filed: October 20, 2016
    Publication date: November 1, 2018
    Inventors: Guillaume BOISSON, Patrick LOPEZ, Dominique THOREAU
  • Patent number: 10091483
    Abstract: The invention consists in a method of and a device for temporal filtering of disparity maps of n different frames, each map indicating the disparity of pixels of 3D images comprising the steps of marking the stationary pixels and the non stationary pixels and implementing temporal filter for stationary pixels, detecting limitations for temporal filtering corresponding to a variation of moving pixels above a determined threshold value and automatically de-activating the temporal filters as response to the detected limitations for temporal filtering.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: October 2, 2018
    Assignee: Thomson Licensing
    Inventors: Valter Drazic, Guillaume Boisson, Paul Kerbiriou
  • Publication number: 20180278955
    Abstract: The present disclosure generally relates to a method for reducing the coding artefact of at least one pixel of a view (170) belonging to a matrix of views (17) obtained from light-field data associated with a scene. According to present disclosure, the method is implemented by a processor and comprises for each said at least one pixel: —from said matrix of views (17), obtaining (51) at least one epipolar plane image (EPI) associated with said pixel, —applying (52) an artefact filtering on pixels of said epipolar plane image (EPI), —redistributing (53) the filtered pixels of the epipolar plane image in the matrix of views (17).
    Type: Application
    Filed: September 15, 2016
    Publication date: September 27, 2018
    Inventors: Dominique THOREAU, Martin ALAIN, Philippe GUILLOTEL, Guillaume BOISSON
  • Publication number: 20180260977
    Abstract: There are several types of plenoptic devices and camera arrays available on the market, and all these light field acquisition devices have their proprietary file format. However, there is no standard supporting the acquisition and transmission of multi-dimensional information. It is interesting to obtain information related to a correspondence between pixels of a sensor of said optical acquisition system and an object space of said optical acquisition system. Indeed, knowing which portion of the object space of an optical acquisition system a pixel belonging to the sensor of said optical acquisition system is sensing enables the improvement of signal processing operations. 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 introduce.
    Type: Application
    Filed: August 23, 2016
    Publication date: September 13, 2018
    Inventors: Laurent BLONDE, Mozhdeh SEIFI, Guillaume BOISSON, Paul KERBIRIOU, Valter DRAZIC
  • Publication number: 20180260969
    Abstract: There are several types of plenoptic devices and camera arrays available on the market, and all these light field acquisition devices have their proprietary file format. However, there is no standard supporting the acquisition and transmission of multi-dimensional information. It is interesting to obtain information related to a correspondence between pixels of a sensor of said optical acquisition system and an object space of said optical acquisition system. Indeed, knowing which portion of the object space of an optical acquisition system a pixel belonging to the sensor of said optical acquisition system is sensing enables the improvement of signal processing operations. 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 introduce.
    Type: Application
    Filed: September 16, 2016
    Publication date: September 13, 2018
    Inventors: Guillaume BOISSON, Arno SCHUBERT, Laurent BLONDE
  • Publication number: 20180249178
    Abstract: A method for encoding a current focal stack is disclosed that comprises a set of images focused at a different focalization distance from one image to another. According to present disclosure, the method comprises: —encoding (31) information representing an image of the current focal stack, the image being selected in said current focal stack according to an image sharpness criterion, and reconstructing the image into a reconstructed image; —encoding (32) at least another image of the current focal stack by prediction from at least the reconstructed image.
    Type: Application
    Filed: September 5, 2016
    Publication date: August 30, 2018
    Inventors: Philippe GUILLOTEL, Dominique THOREAU, Benoit VANDAME, Patrick LOPEZ, Guillaume BOISSON
  • Patent number: 10009590
    Abstract: In an image processing method to display a stereoscopic image on a target screen, a disparity information (200) 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 (20) and a second image (21). 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.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: June 26, 2018
    Assignee: THOMSON LICENSING DTV
    Inventors: Guillaume Boisson, Christel Chamaret, Paul Kerbiriou, Patrick Lopez
  • Publication number: 20180150975
    Abstract: A method for modelling an imaging device including an image sensor and an optical system is disclosed. The optical system has an aperture iris diaphragm defining an entrance pupil of the optical system. For a given configuration of the imaging device the method includes estimating a set of characteristic intrinsic parameters of the imaging device, in which a first intrinsic parameter is representative of a distance between the image plane and a sensor conjugated plane conjugated to the image sensor with respect to the optical system; a second intrinsic parameter is representative of a distance between the sensor conjugated plane and the entrance pupil and a third intrinsic parameter is representative of a magnification of the optical system; determining first and second modelling data respectively as a function of the first and third intrinsic parameters and second and third intrinsic parameters; and establishing a model of the imaging device as a function of the second and third modelling data.
    Type: Application
    Filed: November 10, 2017
    Publication date: May 31, 2018
    Inventors: Valter DRAZIC, Laurent Blonde, Paul Kerbiriou, Olivier Bureller, Guillaume Boisson
  • Publication number: 20180061016
    Abstract: There are several types of plenoptic devices having a 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 introduced. The method according to the invention enables to provide data representative of a bokeh associated to a pixel beam. Such data representative of bokeh associated to a pixel beam enables the displaying of an image with good bokeh properties.
    Type: Application
    Filed: August 22, 2017
    Publication date: March 1, 2018
    Inventors: Guillaume BOISSON, Laurent BLONDE, Benot VANDAME
  • Publication number: 20180047185
    Abstract: A method of providing metadata for captured light field data, the method comprising providing a data format aggregating metadata describing characteristics of at least one of: a light field camera used to capture the light field data, a matrix of views derived from the light field data, and a focal stack derived from the light field data.
    Type: Application
    Filed: February 26, 2016
    Publication date: February 15, 2018
    Inventors: Guillaume BOISSON, Mozhdeh SEIFI, Benoit VANDAME, Neus SABATER
  • Publication number: 20170178351
    Abstract: A method is proposed for determining missing values in a depth map corresponding to a pixel matrix representative of an image. The method comprises: scanning at least one column or row of said depth map; obtaining, for at least one pixel with an invalid depth value being scanned an information representative of the depth of first and second valid neighbor pixels; computing a transposed depth map, corresponding to the depth map of a transposed matrix of the pixel matrix; scanning at least one column or row of said transposed depth map including said invalid pixel; obtaining, for said invalid pixel an information representative of the depth of third and fourth valid neighbor pixels; determining, for said at least one invalid pixel, a depth value based on the information representative of the depth of said first, second, third and fourth valid neighbor pixels.
    Type: Application
    Filed: December 22, 2016
    Publication date: June 22, 2017
    Inventors: Paul KERBIRIOU, Olivier BURELLER, Guillaume BOISSON
  • Publication number: 20170180702
    Abstract: A method for estimating the position, on a sensor of a light-field acquisition device of a projection of a chief ray, corresponding to an optical axis of the light-field acquisition device is described. The method includes determining a coarse estimate of the position of the chief ray projection through shape-matching of the micro-images formed on the sensor by cross-correlation computation and optionally refining the coarse estimate by illumination fall-off analysis of the raw image formed on the sensor.
    Type: Application
    Filed: December 18, 2016
    Publication date: June 22, 2017
    Inventors: Guillaume BOISSON, LIONEL OISEL, Franck GALPIN
  • Publication number: 20170150152
    Abstract: A method for encoding a matrix of views obtained from light-field data is disclosed. The method includes obtaining information representative of a type of encoding and encoding such information, wherein the type of encoding corresponding to an epipolar plane image encoding using at least one part of epipolar plane image, or said type of encoding corresponding to a view by view encoding according to a views' encoding order, and encoding the group of views in said data stream responsive to said information representative of a type of encoding, wherein, in the case where said type of encoding is an epipolar plane image encoding. The group of views is encoded by obtaining at least one part of an epipolar plane image, and encoding said at least one part of an epipolar plane image.
    Type: Application
    Filed: November 19, 2016
    Publication date: May 25, 2017
    Inventors: Dominique THOREAU, Patrick LOPEZ, Guillaume BOISSON
  • Patent number: 9652826
    Abstract: A method for estimating occlusion in a virtual environment comprising at least two objects and observed from a viewpoint. Thereafter, a second item of information representative of the distance separating a second fragment of a second object from the viewpoint according to an observation direction is computed; the second item of information is compared with a first item of information representative of the distance separating a first fragment of a first object from the viewpoint according to the observation direction and is stored in a first buffer memory. If the second item of information is less than the first item of information, then a third item of information representative of attributes associated with the second fragment is estimated, the second item of information is stored in a second buffer memory and of the third item of information is stored in a third buffer memory.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: May 16, 2017
    Assignee: THOMSON LICENSING
    Inventors: Guillaume Boisson, Paul Kerbiriou, David Nebouy
  • Patent number: 9628819
    Abstract: The following steps are carried out in the inventive method: estimation of movement between a current moment corresponding to the current image and a reference moment corresponding to a reference image in order to provide a movement vector, an entropic coding for a high spatial frequency signal relating in the current image, taking into account a temporal context based on the estimation of a movement, one of the parameters used to calculate the temporal context being the parity of a component of the movement vector. Applications are related to video compression with temporal prediction.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: April 18, 2017
    Assignee: THOMSON LICENSING DTV
    Inventors: Guillaume Boisson, Dominique Thoreau, Edouard Francois