Patents by Inventor Paul Kerbiriou

Paul Kerbiriou 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).

  • Patent number: 10319105
    Abstract: A method of calibrating an image acquisition device is described. The method includes emitting at least one light source pattern in an object space of the image acquisition device, adjusting one of the source patterns until an image pattern of the source pattern formed on a sensor of the image acquisition device exhibit a shape which centroid corresponds to a centroid of a reference pixel of the sensor, called a target image pattern and analyzing the adjusted source pattern and estimating therefrom at least one characteristic of a pixel beam directed to the reference pixel from the adjusted source pattern.
    Type: Grant
    Filed: September 18, 2016
    Date of Patent: June 11, 2019
    Assignee: INTERDIGITAL CE PATENT HOLDINGS
    Inventors: Laurent Blonde, Mozhdeh Seifi, Paul Kerbiriou
  • 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: 20190124360
    Abstract: A method for encoding at least one matrix of image views obtained from data acquired by a plenoptic camera is disclosed. Image views of the matrix of image views are partitioned into blocks. For a given image view of the at least one matrix of views, the method includes obtaining at least one block to be encoded and a matching block, wherein a difference between the at least one block to be encoded and the matching block fulfills a block matching criterion; determining a residual block regarding the at least one block to be encoded and the matching block, the determining using modified pixels of the at least one block to be encoded and modified pixels of the matching block according to flux variation parameters associated with a pixel sensor of the plenoptic camera; and encoding the residual block.
    Type: Application
    Filed: June 29, 2018
    Publication date: April 25, 2019
    Inventors: Benoit VANDAME, Fabien RACAPE, Paul KERBIRIOU
  • Patent number: 10116867
    Abstract: A method for displaying at least one light field based image on a user's device is disclosed. Such a method comprises displaying the image focused according to at least one focusing parameter determined as a function of a pose of the user's device. A sensor embedded in the users' device, which may be a handheld device, may estimate the pose.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: October 30, 2018
    Assignee: Thomson Licensing
    Inventors: Laurent Blonde, Benoit Vandame, Paul Kerbiriou
  • 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: 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
  • 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: 20180165251
    Abstract: The disclosure relates to method for storing and transmitting sparse matrices in compact way. When storing and manipulating sparse matrices on a device, it is beneficial and often necessary to use specialized algorithms and data structures that take advantage of the sparse structure of the matrix. The trade-off is that accessing the individual elements becomes more complex and additional structures are needed to be able to recover the original matrix unambiguously. The method according to an embodiment includes storing indexes enabling the position in the matrix of non-null elements to be determined in an ordered way, so as to limit the amount of information to be encoded, and thus reduce the amount of data to be transmitted. The encoded information is sufficient for enabling the reconstruction of the matrix on a receiver.
    Type: Application
    Filed: December 12, 2017
    Publication date: June 14, 2018
    Inventors: Paul Kerbiriou, Mitra Damghanian, Olivier Bureller
  • 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: 20180038733
    Abstract: A method for obtaining, for at least one pixel of an image sensor comprised in an optical device, parameters defining a pixel beam is described. The method is remarkable in that it includes determining a direction of a chief ray associated with at least one pixel of the image sensor from the features of an optical system associated with the optical device, determining a set of pixels formed in a screen of a display device, the set of pixels comprising at least one pixel close to a point corresponding to an intersection of the chief ray and the screen, and the set of pixels comprising only pixels which are detected by the at least one pixel of the image sensor, when they are illuminated.
    Type: Application
    Filed: August 4, 2017
    Publication date: February 8, 2018
    Inventors: Pierre DAVID, Valter Drazic, Laurent Blonde, Paul Kerbiriou, Olivier Bureller
  • Publication number: 20170374388
    Abstract: The present disclosure relates to the transmission of sets of data and metadata and more particularly to the transmission of light-field contents. Light-field data take up large amounts of storage space which makes storage cumbersome and processing less efficient. In addition, light-field acquisition devices are extremely heterogeneous and each camera has its own proprietary file format. Since acquired light-field data from different cameras have a diversity of formats a complex processing is induced on the receiver side. To this end, it is proposed a method for encoding a signal representative of a light-field content in which the parameters representing the rays of light sensed by the different pixels of the sensor are mapped on the sensor. A second set of encoded parameters are used to reconstruct the light-field content from the parameters representing the rays of light sensed by the different pixels of the sensor.
    Type: Application
    Filed: June 22, 2017
    Publication date: December 28, 2017
    Inventors: Paul KERBIRIOU, Didier DOYEN, Sebastien LASSERRE
  • Patent number: 9769397
    Abstract: An electronic imaging device having a plurality of photosensitive cells arranged in an array to form a frame region, the frame region being composed of a plurality of frame sub-regions each frame sub-region corresponding to a sub-set of photosensitive cells, the device comprising an array controller configured to expose each of said frame sub-regions during an exposure duration wherein the exposure of at least some of said frame sub-regions occurs at different times during a total time of exposure of the frame region, a flash unit for illuminating a scene to be imaged during a flash time duration an activator for activating the flash unit to illuminate the scene to be imaged at a flash time delay determined in dependence upon said exposure duration of a frame sub region and the flash time duration; an image data acquisition unit for acquiring a set of frames of the scene wherein the time of occurrence of a flash event within a frame shifts temporally from frame to frame; and an image reconstruction unit for c
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: September 19, 2017
    Assignee: THOMSON LICENSING
    Inventors: Paul Kerbiriou, Matis Hudon, Olivier Bureller
  • 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: 20170171479
    Abstract: The disclosure addresses the vignetting effect caused on an image captured by lightfield camera. A method to compensate for the vignetting effect for a lightfield camera comprising an image sensor array including plurality of photosites. The method includes the operations of obtaining luminance values from the each photosite; obtaining a set of weight values for compensating the vignetting effect for the each photosite being associated with a present setting of the lightfield camera; and changing the luminance values of the each photosite based on the obtained a set of the weight values.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 15, 2017
    Inventors: Mozhdeh SEIFI, Valter Drazic, Paul Kerbiriou
  • 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
  • Publication number: 20170084033
    Abstract: A method of calibrating an image acquisition device is described. The method includes emitting at least one light source pattern in an object space of the image acquisition device, adjusting one of the source patterns until an image pattern of the source pattern formed on a sensor of the image acquisition device exhibit a shape which centroid corresponds to a centroid of a reference pixel of the sensor, called a target image pattern and analyzing the adjusted source pattern and estimating therefrom at least one characteristic of a pixel beam directed to the reference pixel from the adjusted source pattern.
    Type: Application
    Filed: September 18, 2016
    Publication date: March 23, 2017
    Inventors: Laurent BLONDE, Mozhdeh SEIFI, Paul KERBIRIOU
  • Publication number: 20160353026
    Abstract: A method for displaying at least one light field based image on a user's device is disclosed. Such a method comprises displaying the image focused according to at least one focusing parameter determined as a function of a pose of the user's device. A sensor embedded in the users' device, which may be a handheld device, may estimate the pose.
    Type: Application
    Filed: May 27, 2016
    Publication date: December 1, 2016
    Inventors: Laurent BLONDE, Benoit VANDAME, Paul KERBIRIOU
  • Publication number: 20150370258
    Abstract: A method for controlling a path of a rotary-wing drone wherein said method comprises: Establishing a first-order temporal relation between flight control parameters and flight dynamics for said rotary-wing drone comprising: An Explicit Discrete Time-Variant State-Space Representation of a translation control of said rotary-wing drone; An Explicit Discrete Time-Variant State-Space Representation of a course control of said rotary-wing drone; Controlling the path of said rotary-wing drone by: Estimating a course of said rotary-wing drone on the basis of said Explicit Discrete Time-Variant State-Space Representation of a course control of said rotary-wing drone; Estimating a position of said rotary-wing drone on the basis of said Explicit Discrete Time-Variant State-Space Representation of a translation control of said rotary-wing drone; said steps of estimating being performed independently.
    Type: Application
    Filed: June 22, 2015
    Publication date: December 24, 2015
    Inventors: Julien FLEUREAU, Francois-Louis TARIOLLE, Paul KERBIRIOU, Francois Le CLERC
  • Publication number: 20150356709
    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: Application
    Filed: January 20, 2014
    Publication date: December 10, 2015
    Inventors: Guillaume BOISSON, Paul KERBIRIOU, David NEBOUY
  • Patent number: 9204122
    Abstract: A method for adapting 3D video content to a display under different viewing conditions is disclosed. The method has the steps of: retrieving a stereoscopic image pair; obtaining a maximum disparity value for the stereoscopic image pair; determining a largest allowable shift for the stereoscopic image pair using the obtained maximum disparity value; calculating an actual shift for a left image and a right image of the stereoscopic image pair using the determined largest allowable shift; and shifting the left image and the right image in accordance with the calculated actual shift.
    Type: Grant
    Filed: August 13, 2011
    Date of Patent: December 1, 2015
    Assignee: Thomson Licensing
    Inventors: Guillaume Boisson, Paul Kerbiriou, Olivier Bureller