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公开(公告)号：US20240213986A1
公开(公告)日：2024-06-27
申请号：US18572313
申请日：2022-06-21
Applicant: InterDigital CE Patent Holdings, SAS
Inventor： Jurgen Stauder , Patrick Morvan , Anita Orhand
IPC: H03K19/17728
CPC classification number: H03K19/17728
Abstract: A device applies a pre-function to an input signal to obtain an intermediate signal, wherein the pre-function has a linear section part of the input range. The device then applies a LUT including LUT entries that define a linear section and that delimit the range of the intermediate signal that corresponds to the part of the input range, resulting in an output signal that can be linearly processed through the pre-function and the LUT. The device can process a signal with positive and negative values, where one of these lies in the part of the input range that results in linear processing.
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公开(公告)号：US12231122B2
公开(公告)日：2025-02-18
申请号：US18025078
申请日：2021-09-06
Applicant: InterDigital CE Patent Holdings, SAS
Inventor： Jurgen Stauder , Angelo Mazzante , Marie-Jean Colaitis , Patrick Morvan
IPC: H03K19/17728
Abstract: A device applies a pre-function w=P(x) to an input signal x to obtain a first result w and applies a LUT to the first result w, wherein the LUT represents a main function ƒw(w) defined for a second grid of values Gw such that the pre-function P(x) is piecewise defined on a first grid Gx of signal values, where Gw=P(Gx). The device can further obtain the pre-function P(x), piecewise defined on the first grid Gx of the signal x and calculate the LUT with the second grid Gw=P(Gx). The piecewise pre-function P(x) can be obtained from a second pre-function Q(x) by applying Q(x) to signal values x to calculate the second grid Gw=Q(Gx) and defining the pre-function P(x) piecewise on the first grid Gx by linear interpolation of the values of the second grid Gw such that P(Gx)=Q(Gx).
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公开(公告)号：US12038966B2
公开(公告)日：2024-07-16
申请号：US16934636
申请日：2020-07-21
Applicant: INTERDIGITAL CE PATENT HOLDINGS
Inventor： Jurgen Stauder , Neus Sabater , Cedric Thebault
IPC: G06F16/51 , G06F16/583 , G06F18/22 , G06T7/60
CPC classification number: G06F16/51 , G06F16/583 , G06F16/5854 , G06F18/22 , G06T7/60 , G06T2207/10052
Abstract: A method and an apparatus for data retrieval in a lightfield database are described. An acquiring unit of the apparatus acquires a sample data. An operation unit determines a plurality of two-dimensional (2D) images from each 4D lightfield data of the lightfield database, and match the sample data with the determined 2D images according to geometrical parameters of the sample data and geometrical parameters of the 2D images. One of the 2D images is selected as a target image based on the matching result, and the 4D lightfield from which the target image is determined is retrieved.
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公开(公告)号：US20250022434A1
公开(公告)日：2025-01-16
申请号：US18713545
申请日：2022-11-18
Applicant: InterDigital CE Patent Holdings, SAS
Inventor： Patrick Morvan , Jurgen Stauder , Anita Orhand , David Touze
Abstract: Methods, devices and video data for encoding, transmitting and decoding a video content item that is rendered and displayed with the same perceived color per any viewer, a content creator included, on any display. The colors wanted by the content creator are encoded in video data in association with master display information corresponding to the display used by the content creator and with master observer information corresponding to the vision characteristics of the content creator. Reciprocally, at decoder side, user display information and user observer information are collected. The rendered video on the user display is color adapted by using both the master information and the user information.
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公开(公告)号：US20230336178A1
公开(公告)日：2023-10-19
申请号：US18025078
申请日：2021-09-06
Applicant: InterDigital CE Patent Holdings, SAS
Inventor： Jurgen Stauder , Angelo Mazzante , Marie-Jean Colaitis , Patrick Morvan
IPC: H03K19/17728
CPC classification number: H03K19/17728
Abstract: A device applies a pre-function w=P(x) to an input signal x to obtain a first result w and applies a LUT to the first result w, wherein the LUT represents a main function ƒw(w) defined for a second grid of values Gw such that the pre-function P(x) is piecewise defined on a first grid Gx of signal values, where Gw=P(Gx). The device can further obtain the pre-function P(x), piecewise defined on the first grid Gx of the signal x and calculate the LUT with the second grid Gw=P(Gx). The piecewise pre-function P(x) can be obtained from a second pre-function Q(x) by applying Q(x) to signal values x to calculate the second grid Gw=Q(Gx) and defining the pre-function P(x) piecewise on the first grid Gx by linear interpolation of the values of the second grid Gw such that P(Gx)=Q(Gx).
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公开(公告)号：US10270943B2
公开(公告)日：2019-04-23
申请号：US15739769
申请日：2016-06-08
Applicant: INTERDIGITAL CE PATENT HOLDINGS
Inventor： Cedric Thebault , Jurgen Stauder , Anita Orhand
Abstract: An aspect of present principles is directed to methods and systems for gamut mapping source colors into target colors from a source color gamut towards a target color gamut. A difference may be determined source specific colors and corresponding target specific colors. A source hue of the source specific colors is adaptively changed towards a target hue of the corresponding target specific colors based on the difference to determine mapped specific colors. Color gamut mapping is performed for the source colors of the source color gamut towards the target color gamut based on the mapped specific colors. The specific colors are selected from primary colors, secondary colors, a group of primary colors and secondary colors. The difference is based on at least one selected from the group of hue, saturation and lightness of the source specific colors and the corresponding target specific colors.
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公开(公告)号：US11290696B2
公开(公告)日：2022-03-29
申请号：US16489617
申请日：2018-02-26
Applicant: InterDigital CE Patent Holdings, SAS
Inventor： Jurgen Stauder , Anita Orhand , Corinne Poree
Abstract: An aspect of present principles is directed to methods and systems for gamut mapping colors from a either a source color gamut or a content color gamut towards a target color gamut. A source hue of the source specific colors and a source hue of the content specific colors is changed towards a target hue of the corresponding target specific colors. Color gamut mapping is performed for the source colors of either the whole source color gamut or the content color gamut towards the target color gamut based on the mapped specific colors. The specific colors are selected from primary colors, secondary colors, a group of primary colors and secondary colors.
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公开(公告)号：US11138795B2
公开(公告)日：2021-10-05
申请号：US15987685
申请日：2018-05-23
Applicant: InterDigital CE Patent Holdings, SAS
Inventor： Jurgen Stauder , Philippe Robert , Sylvain Duchene
Abstract: In a situation where a capturing device is capturing a first image of a scene comprising a display device displaying a second image, a salient idea is to send both the captured first image and the second image, being displayed by the display device to a processing device, for comparatively processing the first and the second image to determine a characteristic associated with the display device. Being able to process the first image (comprising a displayed second image) together with the original second image advantageously allows to determine various characteristics associated with the display device that altered the displayed second image within the first image, making it different from the initial second image. Characteristics associated with the display device are for example a specular reflection occurring on the display device in the scene and disturbing the capture of the scene.
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公开(公告)号：US11044409B2
公开(公告)日：2021-06-22
申请号：US16347439
申请日：2017-10-26
Applicant: INTERDIGITAL CE PATENT HOLDINGS
Inventor： Jurgen Stauder , Philippe Robert , David Gendron
Abstract: The present invention relates to a method for estimating cast shadow regions and highlight regions in a scene, said scene being represented by a low dynamic range image, called LDR image, and a high dynamic range, called HDR image, said method comprising the steps of: —computing (S1) a detail map, called LDR detail map, of the LDR image, said LDR detail map associating a detail level to each pixel of the LDR image, —computing (S2) a detail map, called HDR detail map, of the HDR image, said HDR detail map associating a detail level to each pixel of the HDR image, and —detecting (S3) regions of the scene where the detail level in the HDR detail map is greater than the detail level in the LDR detail map, said detected regions corresponding to cast shadow regions or highlights region of the scene.
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公开(公告)号：US10742849B2
公开(公告)日：2020-08-11
申请号：US16337885
申请日：2017-09-21
Applicant: INTERDIGITAL CE PATENT HOLDINGS
Inventor： Cedric Thebault , Jurgen Stauder , Anita Orhand
Abstract: This determination comprises: defining key constant-hue leaves such as to partition the gamut mapping color space into angular hue sectors; for each key constant hue leaf, defining a key hue leaf chroma mapping function; for each angular hue sector, defining a continuous angular hue sector chroma mapping function such that, for any source color belonging to one of the two key constant-hue leaves delimiting this angular hue sector, this continuous chroma mapping function allows to map the chroma of said source color according to the key hue leaf chroma mapping function of the key constant-hue leaf to which said source color belongs. Preferably, this mapping functions are non linear polynomials.
