公开(公告)号：WO2019094346A1

公开(公告)日：2019-05-16

申请号：PCT/US2018/059307

申请日：2018-11-06

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： ANDRIVON, Pierre ,  COLAITIS, Marie-Jean ,  TOUZE, David

IPC: H04N19/70 ,  H04N19/46 ,  H04N19/186 ,  H04N19/98

CPC classification number: H04N19/70 ,  H04N19/186 ,  H04N19/46 ,  H04N19/98

Abstract: According to at least one embodiment, there is provided a device configured to compare a first set bits of formatted metadata, the formatted metadata associated with first image data both being received from an uncompressed interface, with at least one second set of bits identifying a particular formatting of said formatted metadata; and to reconstruct second image data from said first image data and parameters obtained by parsing said formatted metadata according to a particular formatting identified from the result of said comparison.

公开(公告)号：WO2020018331A1

公开(公告)日：2020-01-23

申请号：PCT/US2019/041275

申请日：2019-07-11

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： ANDRIVON, Pierre ,  LOPEZ, Patrick ,  COLAITIS, Marie-Jean ,  TOUZE, David

IPC: H04N19/98 ,  G06T5/00

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.

公开(公告)号：WO2019108899A1

公开(公告)日：2019-06-06

申请号：PCT/US2018/063254

申请日：2018-11-30

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： CELLIER, Francois ,  OLIVIER, Yannick ,  COLAITIS, Marie-Jean ,  TOUZE, David

IPC: H04N19/30 ,  H04N19/98 ,  H04N19/186 ,  G06T5/00 ,  H04N19/117 ,  H04N19/85

CPC classification number: H04N19/98 ,  H04N19/117 ,  H04N19/186 ,  H04N19/30 ,  H04N19/85

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.

公开(公告)号：WO2020014034A1

公开(公告)日：2020-01-16

申请号：PCT/US2019/040225

申请日：2019-07-02

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： ANDRIVON, Pierre ,  COLAITIS, Marie-Jean ,  TOUZE, David

IPC: H04N19/36 ,  H04N19/85 ,  H04N19/117 ,  H04N19/14 ,  H04N19/186

Abstract: The present embodiments obtain chroma components representative of the chroma components of an output image from color components representative of an input image, and if a value of a pixel in at least one of said chroma components exceeds a given value, modify the value of said pixel in at least one of said color components in such a way that the value of said pixel in said at least one of said chroma components is lower than or equals to said given value.

公开(公告)号：WO2019108882A1

公开(公告)日：2019-06-06

申请号：PCT/US2018/063218

申请日：2018-11-30

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： COLAITIS, Marie-Jean ,  TOUZE, David ,  CARAMELLI, Nicolas

IPC: H04N19/30 ,  G06T5/00 ,  H04N1/60 ,  H04N9/77 ,  H04N19/186

CPC classification number: H04N19/30 ,  G06T5/009 ,  G06T2207/10024 ,  G06T2207/20208 ,  H04N1/6058 ,  H04N19/186

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.

公开(公告)号：WO2019094356A1

公开(公告)日：2019-05-16

申请号：PCT/US2018/059351

申请日：2018-11-06

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： ANDRIVON, Pierre ,  COLAITIS, Marie-Jean ,  TOUZE, David ,  LLACH PINSACH, Joan

IPC: H04N1/60 ,  H04N19/70 ,  H04N19/46 ,  H04N19/85 ,  G06T5/00

CPC classification number: H04N1/603 ,  H04N19/46 ,  H04N19/70 ,  H04N19/85

Abstract: 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, can involve controlling the color gamut mapping process at least by 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 and, 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, controlling the color gamut mapping process by a substitute color gamut mapping mode determined from additional data.

公开(公告)号：WO2020131920A2

公开(公告)日：2020-06-25

申请号：PCT/US2019/066927

申请日：2019-12-17

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： ANDRIVON, Pierre ,  COLAITIS, Marie-Jean ,  TOUZE, David

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 is a tone mapping function. Corresponding apparatus implementing the method is also described.

公开(公告)号：WO2018197263A1

公开(公告)日：2018-11-01

申请号：PCT/EP2018/059758

申请日：2018-04-17

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： THEBAULT, Cédric ,  COLAITIS, Marie-Jean ,  MAZZANTE, Angelo

IPC: H04N1/60

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.