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1.发明授权公开(公告)号：US11388447B2
公开(公告)日：2022-07-12
申请号：US17261658
申请日：2019-07-11
Applicant: InterDigital VC Holdings, Inc.
Inventor： Pierre Andrivon , Patrick Lopez , Marie-Jean Colaitis , David Touze
IPC: H04N19/98 , H04N19/70 , G06T5/00 , H04N19/186
Abstract: A medium dynamic range video signal and associated metadata are received, wherein the metadata include data representative of a peak luminance value of the signal. The medium dynamic range video signal is processed in a first mode to reconstruct a high dynamic range video signal based on a received standard dynamic range video signal and associated metadata if the peak luminance value of the medium dynamic range video signal is smaller than the peak luminance value of a presentation display, and in a second mode to optimize a received high dynamic range video signal for a rendering device if the peak luminance value of the medium dynamic range video signal is greater than the peak luminance value of the presentation display.
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公开(公告)号：US10733712B2
公开(公告)日：2020-08-04
申请号：US16098123
申请日：2017-01-20
Applicant: INTERDIGITAL VC HOLDINGS, INC.
Inventor： Marie-Jean Colaitis , Laurent Cauvin , Tania Pouli
Abstract: The module (700) comprises: —a low pass filter for low pass filtering luminance component of the image, —a first look up table (710) storing precomputed values of a first expansion function of only low pass filtered luminance values, —a second look up table (720) storing precomputed values of a second expansion function of only luminance values, —a processor (740, 760) configured to multiply an output of the second look up table corresponding to an input luminance value of a color to expand by an output of said first look up table corresponding to an input low pass filtered luminance value associated with said input luminance value.
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公开(公告)号：US11544824B2
公开(公告)日：2023-01-03
申请号：US16762928
申请日：2018-11-06
Applicant: InterDigital VC Holdings, Inc.
Inventor： Pierre Andrivon , Marie-Jean Colaitis , David Touze , Joan Llach Pinsach
Abstract: Described are methods and devices for applying a color gamut mapping process on a first image to generate a second image, where the content of the first and second images is similar but the respective color spaces of the first and second images are different. The color gamut mapping process may be controlled using a color gamut mapping mode obtained from a bitstream where the color gamut mapping mode belongs to a set comprising at least two preset modes and an explicit parameters mode. If the obtained color gamut mapping mode is the explicit parameters mode and the color gamut mapping process is not enabled for the explicit parameters mode, the color gamut mapping process may be controlled by a substitute color gamut mapping mode determined from additional data.
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公开(公告)号：US20210183028A1
公开(公告)日：2021-06-17
申请号：US16768282
申请日：2018-11-30
Applicant: InterDigital VC Holdings, Inc.
Inventor： Francois Cellier , Yannick Olivier , Marie-Jean Colaitis , David Touze
Abstract: A system and method is provided for generating a tone mapping function to reduce dynamic range of a first image to produce a second image. A luma signal and a plurality of chroma components associated with the first and second image are then determined. A gamut color correction is then performed on the second image using an adaptive function. The adaptive function is generated by comparing said luma signal and at least one chroma component of said first and second image.
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公开(公告)号：US11989855B2
公开(公告)日：2024-05-21
申请号：US16768282
申请日：2018-11-30
Applicant: InterDigital VC Holdings, Inc.
Inventor： Francois Cellier , Yannick Olivier , Marie-Jean Colaitis , David Touze
CPC classification number: G06T5/009 , G06T5/50 , G06T2207/10024 , G06T2207/20024 , G06T2207/20208
Abstract: A system and method is provided for generating a tone mapping function to reduce dynamic range of a first image to produce a second image. A luma signal and a plurality of chroma components are determined and a gamut color correction is then performed. An adaptive function is generated by comparing the luma signal and at least one chroma component of the first and second image.
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Patent Agency Ranking
公开(公告)号：US11263731B2
公开(公告)日：2022-03-01
申请号：US16608860
申请日：2018-04-17
Applicant: INTERDIGITAL VC HOLDINGS, INC.
Inventor： Cedric Thebault , Marie-Jean Colaitis , Angelo Mazzante
Abstract: The present principles relate to a method and device for gamut mapping from a first color gamut towards a second color gamut. The method comprises, in a plane of constant hue, obtaining a target lightness for a color on the boundary of first gamut with maximum chroma, called first cusp color; and lightness mapping of the color from the first color gamut towards the second color gamut wherein the lightness mapped color is calculated from a parabolic function applied to the color, the parabolic function mapping the first cusp color to a color having the target lightness. According to a particular characteristic, a preserved chroma is also obtained; and in case the chroma of the color is lower than or equal to the preserved chroma, the lightness mapped color is the color, and in case the chroma of the color is higher than the preserved chroma, the lightness mapped color is calculated from the parabolic function applied to the color.
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公开(公告)号：US11025875B2
公开(公告)日：2021-06-01
申请号：US15572894
申请日：2016-05-11
Applicant: InterDigital VC Holdings, Inc.
Inventor： Fabrice Urban , Philippe Bordes , Marie-Jean Colaitis , Pierre Andrivon
IPC: G06T1/20 , H04N9/67 , H04N19/463 , H04N1/60 , H04N9/68 , H04N19/186 , H04N19/70 , H04N19/52 , H04N11/20
Abstract: A method for color mapping a video signal into a mapped video signal responsive to at least one color mapping function is disclosed. To this aim, at least one black point offset is determined responsive to a color encoding system of the video signal and to a color encoding system of the mapped video signal. The at least one black point offset and the at least one color mapping function are then applied on the video signal to obtain the mapped video signal.
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8.发明授权公开(公告)号：US11902595B2
公开(公告)日：2024-02-13
申请号：US17860752
申请日：2022-07-08
Applicant: InterDigital VC Holdings, Inc.
Inventor： Pierre Andrivon , Patrick Lopez , Marie-Jean Colaitis , David Touze
IPC: H04N19/98 , H04N19/70 , H04N19/186 , G06T5/00
Abstract: Different implementations are described, particularly implementations for processing a medium dynamic range video signal are presented. In a method for processing such a video signal a medium dynamic range video signal and associated metadata are received, wherein the metadata include data representative of a peak luminance value of the medium dynamic range video signal. In addition, data representative of a peak luminance value of a presentation display are received. It is determined whether the peak luminance value of the medium dynamic range video signal is greater or lower than the peak luminance value of the presentation display. A processor is configured based on the determination, wherein the processor has a first mode to reconstruct a high dynamic range video signal based on a received standard dynamic range video signal and associated metadata, and a second mode to optimize a received high dynamic range video signal for the rendering device. The medium dynamic range video signal is processed by the processor in the first mode if the peak luminance value of the medium dynamic range video signal is smaller than the peak luminance value of the presentation display and in the second mode if the peak luminance value of the medium dynamic range video signal is greater than the peak luminance value of the presentation display.
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公开(公告)号：US11928796B2
公开(公告)日：2024-03-12
申请号：US16978209
申请日：2018-11-30
Applicant: InterDigital VC Holdings, Inc.
Inventor： Marie-Jean Colaitis , David Touze , Nicolas Caramelli
CPC classification number: G06T5/009 , G06T3/40 , G06T5/20 , G06T5/007 , G06T2207/10024 , G06T2207/20208
Abstract: Encoding can involve correcting chroma components representing the chroma of an input image according to a first component representing a mapping of the luminance component of said input image used for reducing or increasing the dynamic range of said luminance component, and a reconstructed component representing an inverse mapping of said first component. At least one correction factor according to said at least one scaled chroma components can also be obtained and transmitted. Decoding can involve scaled chroma components being obtained by multiplying chroma components of an image by at least one corrected chroma correction function depending on said at least one correction factor. Components of a reconstructed image can then be derived as a function of said scaled chroma components and a corrected matrix that depends on an inverse of a theoretical color space matrix conversion and said at least one correction factor.
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公开(公告)号：US11722704B2
公开(公告)日：2023-08-08
申请号：US17415959
申请日：2019-12-17
Applicant: InterDigital VC Holdings, Inc.
Inventor： Pierre Andrivon , Marie-Jean Colaitis , David Touze
Abstract: A method for decoding an image enables to preserve artistic intent at the final rendering stage by adjusting the image to luminance characteristics of the content and of the presentation display that will display the image. Values representative of luminance of both the image and the display device are obtained. Parameters of a display adaptation function are adjusted according to these values and the adjusted display adaptation function is used to decode the image. In at least one embodiment, the adjusted display adaptation function relates to a tone mapping function. Corresponding apparatus implementing the method is also described.
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