Invention Grant
- Patent Title: Display management for high dynamic range video
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Application No.: US14755755Application Date: 2015-06-30
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Publication No.: US09613407B2Publication Date: 2017-04-04
- Inventor: Robin Atkins , Samir N. Hulyalkar
- Applicant: Dolby Laboratories Licensing Corporation
- Applicant Address: US CA San Francisco
- Assignee: Dolby Laboratories Licensing Corporation
- Current Assignee: Dolby Laboratories Licensing Corporation
- Current Assignee Address: US CA San Francisco
- Main IPC: G09G5/10
- IPC: G09G5/10 ; G09G5/02 ; G06T5/00 ; H04N1/60 ; H04N9/67 ; G06K9/52 ; H04N9/68

Abstract:
A display management processor receives an input image with enhanced dynamic range to be displayed on a target display which has a different dynamic range than a reference display. The input image is first transformed into a perceptually-quantized (PQ) color space. A non-linear mapping function generates a tone-mapped intensity image in response to the characteristics of the source and target display and a measure of the intensity of the PQ image. After a detail-preservation step which may generate a filtered tone-mapped intensity image, an image-adaptive intensity and saturation adjustment step generates an intensity adjustment factor and a saturation adjustment factor as functions of the measure of intensity and saturation of the PQ image, which together with the filtered tone-mapped intensity image are used to generate the output image. Examples of the functions to compute the intensity and saturation adjustment factors are provided.
Public/Granted literature
- US20160005153A1 Display Management for High Dynamic Range Video Public/Granted day:2016-01-07
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