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公开(公告)号：US10474102B2
公开(公告)日：2019-11-12
申请号：US15573723
申请日：2016-05-10
Applicant: B<>COM , Orange , Universite De Rennes 1 , INSA De Rennes
Inventor： Antonin Gilles , Patrick Gioia , Remi Cozot , Luce Morin
Abstract: A method for digitally generating a hologram plane from a three-dimensional scene, cut into a plurality of planes parallel to the hologram plane. The method includes for a current plane: counting a number of points of the non-zero amplitude scene; choosing a first or second technique for propagating a light wave emitted by the current plane as a function of a number of points of non-zero amplitude included in the current plane and with a preset threshold value, the first, point-based technique calculating the propagation of a sum of light waves emitted by point sources constituted by the points of the scene portion of a non-zero amplitude of the current plane on a following plane, and the second, field-based technique, globally calculating a light wave emitted by the scene portion situated in the current plane on a given plane; and processing the current plane according to the chosen propagation technique.
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2.发明授权公开(公告)号：US11102463B2
公开(公告)日：2021-08-24
申请号：US16483306
申请日：2018-01-17
Applicant: B<>COM
Inventor： Cambodge Bist , Remi Cozot , Gerard Madec
Abstract: A method for processing at least one digital image for reproduction on a display device. The image includes image elements, an image element being associated with color information having, in a first color space, a luminance component and chrominance components. The method includes the following acts: determining a number of image elements, known as “bright” elements, at least the luminance component of which has a value greater than a first predetermined threshold; evaluating a maximum tolerated brightness value as a decreasing function of the number of counted image elements; and transforming the first luminance components of the image elements to second luminance components, including for an image element, calculating an intermediate luminance value by applying an expansion exponent to the first luminance component value and multiplying the intermediate value calculated by the evaluated maximum tolerated luminosity value.
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Patent Agency Ranking
3.发明申请公开(公告)号：US20200068183A1
公开(公告)日：2020-02-27
申请号：US16288554
申请日：2019-02-28
Applicant: B<>COM
Inventor： Cambodge Bist , Remi Cozot , Gerard Madec
IPC: H04N9/77
Abstract: A method for processing a digital image including image elements having a first luminance component. The first luminance component has a first value in a first predetermined interval. The display can render second values of second luminance components included in a second predetermined interval. The method includes: determining information representative of image brightness perceived by an observer, based on the first values of the first luminance component; calculating an expansion exponent as a function of the determined brightness information; transforming the first luminance components into the second luminance components, including calculating an intermediate luminance value by applying the calculated expansion exponent to the first luminance component value, multiplying the intermediate value by a length of the second interval, and obtaining the second value of the second luminance component based on the multiplied intermediate luminance value. The expansion exponent is based on a logarithm, of the determined brightness information.
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4.发明授权公开(公告)号：US10326971B2
公开(公告)日：2019-06-18
申请号：US16063441
申请日：2016-12-09
Applicant: B<>COM , UNIVERSITE RENNES 1 , INSTITUT MINES TELECOM
Inventor： Cambodge Bist , Remi Cozot , Gerard Madec
Abstract: A method for processing a digital image for rendering on a display. The image includes image elements associated with color information represented in a colorimetric space having a luminance and chrominance components. The luminance component has a value in a first predetermined interval. The display can render values of luminance components included in a second predetermined interval, of greater length than the first interval. The method includes: determining information representative of image brightness perceived by an observer, based on the values of the first luminance component; calculating an expansion exponent as a function of the determined brightness information; transforming the first luminance components into second luminance components, including calculating an intermediate luminance value by applying the calculated expansion exponent to the first luminance component value and multiplying the intermediate value by the length of the second interval. The expansion exponent is a decreasing function of the determined brightness information.
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5.发明申请公开(公告)号：US20200007839A1
公开(公告)日：2020-01-02
申请号：US16483306
申请日：2018-01-17
Applicant: B<>COM
Inventor： Cambodge Bist , Remi Cozot , Gerard Madec
Abstract: A method for processing at least one digital image for reproduction on a display device. The image includes image elements, an image element being associated with color information having, in a first color space, a luminance component and chrominance components. The method includes the following acts: determining a number of image elements, known as “bright” elements, at least the luminance component of which has a value greater than a first predetermined threshold; evaluating a maximum tolerated brightness value as a decreasing function of the number of counted image elements; and transforming the first luminance components of the image elements to second luminance components, including for an image element, calculating an intermediate luminance value by applying an expansion exponent to the first luminance component value and multiplying the intermediate value calculated by the evaluated maximum tolerated luminosity value.
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6.发明申请公开(公告)号：US20180376120A1
公开(公告)日：2018-12-27
申请号：US16063441
申请日：2016-12-09
Applicant: B<>COM , UNIVERSITE RENNES 1 , INSTITUT MINES TELECOM
Inventor： Cambodge Bist , Remi Cozot , Gerard Madec
Abstract: A method for processing a digital image for rendering on a display. The image includes image elements associated with color information represented in a colorimetric space having a luminance and chrominance components. The luminance component has a value in a first predetermined interval. The display can render values of luminance components included in a second predetermined interval, of greater length than the first interval. The method includes: determining information representative of image brightness perceived by an observer, based on the values of the first luminance component; calculating an expansion exponent as a function of the determined brightness information; transforming the first luminance components into second luminance components, including calculating an intermediate luminance value by applying the calculated expansion exponent to the first luminance component value and multiplying the intermediate value by the length of the second interval. The expansion exponent is a decreasing function of the determined brightness information.
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公开(公告)号：US20180143589A1
公开(公告)日：2018-05-24
申请号：US15573723
申请日：2016-05-10
Applicant: B<>COM , Orange , Universite De Rennes 1 , INSA De Rennes
Inventor： Antonin Gilles , Patrick Gioia , Remi Cozot , Luce Morin
CPC classification number: G03H1/268 , G03H1/0406 , G03H1/0443 , G03H1/0808 , G03H2001/0428 , G03H2001/0452 , G03H2001/269 , G03H2210/36 , G03H2210/452 , G03H2210/454 , G03H2226/02
Abstract: A method for digitally generating a hologram plane from a three-dimensional scene, cut into a plurality of planes parallel to the hologram plane. The method includes for a current plane: counting a number of points of the non-zero amplitude scene; choosing a first or second technique for propagating a light wave emitted by the current plane as a function of a number of points of non-zero amplitude included in the current plane and with a preset threshold value, the first, point-based technique calculating the propagation of a sum of light waves emitted by point sources constituted by the points of the scene portion of a non-zero amplitude of the current plane on a following plane, and the second, field-based technique, globally calculating a light wave emitted by the scene portion situated in the current plane on a given plane; and processing the current plane according to the chosen propagation technique.
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