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公开(公告)号：US11158032B2
公开(公告)日：2021-10-26
申请号：US16495532
申请日：2018-03-19
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Robin Atkins , David Brooks , Jaclyn Anne Pytlarz , Jon S. McElvain , Robert Wanat
IPC: G06T5/00
Abstract: Input scene images are captured from an original scene. The input scene images may be represented in an input color space. The input scene images are converted into color-space-converted scene images in one of an LMS color space, an ICtCp color space, etc. Scene light levels represented in the color-space-converted scene images are mapped, based at least in part on an optical transfer function, to mapped light levels. A tone mapping is applied to the mapped light levels to generate corresponding display light levels to be represented in display images. The display images may be rendered on a target display.
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公开(公告)号：US11776099B2
公开(公告)日：2023-10-03
申请号：US17344843
申请日：2021-06-10
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Robert Wanat , Robin Atkins , Anustup Kumar Atanu Choudhury , Scott Daly , Jaclyn Anne Pytlarz
CPC classification number: G06T7/0002 , G06T5/002 , G06T5/50 , G06T7/97 , G06T2207/10024 , G06T2207/20024 , G06T2207/20224 , G06T2207/30168
Abstract: Methods and systems for generating an image quality metric are described. A reference and a test image are first converted to the ITP color space. After calculating difference images ΔI, ΔT, and ΔP, using the color channels of the two images, the difference images are convolved with low pass filters, one for the I channel and one for the chroma channels (I or P). The image quality metric is computed as a function of the sum of squares of filtered ΔI, ΔT, and ΔP values. The chroma low-pass filter is designed to maximize matching the image quality metric with subjective results.
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3.发明公开公开(公告)号：US20240161706A1
公开(公告)日：2024-05-16
申请号：US18281845
申请日：2022-05-12
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robert Wanat
CPC classification number: G09G3/3406 , G09G3/001 , G09G2320/0238 , G09G2320/0271 , G09G2320/066 , G09G2320/0686
Abstract: Methods are disclosed for adaptive display management using one or more viewing environment parameters. Given the one or more viewing environment parameters, an effective luminance range for a target display, and an input image, a tone-mapped image is generated based on a tone-mapping curve, an original PQ luminance mapping function, and the effective luminance range of the display. Corrected PQ (PQ′) luminance mapping functions are generated according to the viewing environment parameters and, optionally, the transmissivity properties and reflectivity properties of the target display. PQ-to-PQ′ mappings are generated, where each corrected (PQ′) luminance mapping function is associated with a different set of viewing environment parameters and is associated with a different region of the display and where codewords in the original PQ luminance mapping function are mapped to codewords in the corrected (PQ′) luminance mapping functions, and an adjusted tone-mapped image is generated based on the PQ-to-PQ′ mappings.
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Patent Agency Ranking
公开(公告)号：US11277543B1
公开(公告)日：2022-03-15
申请号：US17319483
申请日：2021-05-13
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Jaclyn Anne Pytlarz , Robert Wanat
Abstract: In a method for dithering image data, a processor receives an input image in a first color space and a first bit depth larger than 8 bits. The processor converts the input image into a first image in a perceptually uniform color space, such as the BT. 2100 ICtCp color space, with pixel values scaled to be within a target bit depth, it quantizes the first image to generate a quantized image, it generates an error image between the first image and the quantized image, and using a random threshold, it generates a dithered image based on the random threshold, the error image, and the quantized image, allowing to reduce the bit-depth representation for visually consistent reproduction by two bits.
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公开(公告)号：US10140953B2
公开(公告)日：2018-11-27
申请号：US15298521
申请日：2016-10-20
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Robert Wanat , Robin Atkins , Scott Daly
IPC: G09G5/10 , G09G5/02 , G06T7/90 , G06T5/00 , G06T11/00 , G06T3/40 , G06T7/40 , H04N1/60 , H04N5/58 , H04N5/57 , H04N9/73
Abstract: Methods are disclosed for adaptive display management using one or more viewing environment parameters. Given the one or more viewing environment parameters, an effective luminance range for a target display, and an input image, a tone-mapped image is generated based on a tone-mapping curve, an original PQ luminance mapping function, and the effective luminance range of the display. A corrected PQ (PQ′) luminance mapping function is generated according to the viewing environment parameters. A PQ-to-PQ′ mapping is generated, wherein codewords in the original PQ luminance mapping function are mapped to codewords in the corrected (PQ′) luminance mapping function, and an adjusted tone-mapped image is generated based on the PQ-to-PQ′ mapping.
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公开(公告)号：US20170116963A1
公开(公告)日：2017-04-27
申请号：US15298521
申请日：2016-10-20
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Robert Wanat , Robin Atkins , Scott Daly
CPC classification number: G09G5/10 , G06T5/009 , G06T7/90 , G06T2207/10024 , G06T2207/20208 , G09G3/3406 , G09G2320/0233 , G09G2320/0238 , G09G2320/0606 , G09G2320/0646 , G09G2320/066 , G09G2340/06 , G09G2360/144 , G09G2360/145
Abstract: Methods are disclosed for adaptive display management using one or more viewing environment parameters. Given the one or more viewing environment parameters, an effective luminance range for a target display, and an input image, a tone-mapped image is generated based on a tone-mapping curve, an original PQ luminance mapping function, and the effective luminance range of the display. A corrected PQ (PQ′) luminance mapping function is generated according to the viewing environment parameters. A PQ-to-PQ′ mapping is generated, wherein codewords in the original PQ luminance mapping function are mapped to codewords in the corrected (PQ′) luminance mapping function, and an adjusted tone-mapped image is generated based on the PQ-to-PQ′ mapping.
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公开(公告)号：US20250095125A1
公开(公告)日：2025-03-20
申请号：US18291578
申请日：2022-07-22
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robert Wanat , Anustup Kumar Atanu Choudhury , Robin Atkins
Abstract: Methods and systems for dynamic range conversion and display mapping of standard dynamic range (SDR) images onto high dynamic range (HDR) displays are described. Given an SDR input image, a processor generates an intensity (luminance) image and optionally a base layer image and a detail layer image. A first neural network uses the intensity image to predict statistics of the SDR image in a higher dynamic range. These predicted statistics together with the original image statistics of the input image are used to derive an optimal tone-mapping curve to map the input SDR image onto an HDR display. Optionally, a second neural network, using the intensity image and the detail layer image, can generate a residual detail layer image in a higher dynamic range to enhance the tone-mapping of the base layer image into the higher dynamic range.
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公开(公告)号：US20250054204A1
公开(公告)日：2025-02-13
申请号：US18696025
申请日：2022-09-27
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Jaclyn Anne Pytlarz , Robert Wanat , Jake William Zuena
Abstract: Systems and methods for encoding and decoding multiple-intent images and video using metadata. When encoding an image as a multiple-intent image, at least one appearance adjustment may be made to the image. Metadata characterizing the at least one appearance adjustment may be included in, or transmitted along with, the encoded multiple-intent image. When decoding a multiple-intent image, a system may obtain a selection of a desired rendering intent and, based on that selection, either render the multiple-intent image with the applied appearance adjustments or may use the metadata to invert the appearance adjustments and recover the image pre-appearance adjustments.
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