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1. US20220114707 - HDR TONE MAPPING BASED ON CREATIVE INTENT METADATA AND AMBIENT LIGHT

Office
United States of America
Application Number 17169201
Application Date 05.02.2021
Publication Number 20220114707
Publication Date 14.04.2022
Publication Kind A1
IPC
G06T 5/00
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
G06T 5/40
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
40by the use of histogram techniques
CPC
G06T 5/40
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
40by the use of histogram techniques
G06T 5/009
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5Image enhancement or restoration
007Dynamic range modification
009Global, i.e. based on properties of the image as a whole
Applicants Samsung Electronics Co., Ltd.
Inventors Dung Trung Vo
Chenguang Liu
McClain C. Nelson
William Mandel
Soojung Hyun
Title
(EN) HDR TONE MAPPING BASED ON CREATIVE INTENT METADATA AND AMBIENT LIGHT
Abstract
(EN)

One embodiment provides a method comprising determining multi-dimensional metadata corresponding to an input image, and determining ambient light information indicative of a level of ambient light in an ambient environment of a display device. The multi-dimensional metadata comprises a cumulative distribution function (CDF) of pixels in the input image. The method further comprises determining, based on the multi-dimensional metadata and the ambient light information, one or more gains that adaptively compensate for the level of ambient light in the ambient environment. The method further comprises generating a tone mapping function based on the one or more gains, and applying the tone mapping function to the input image to generate a tone-mapped image that adaptively compensates for the level of ambient light in the ambient environment. The tone-mapped image is provided to the display device for presentation.


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