Invention Grant
- Patent Title: Chroma reshaping based on just noticeable differences
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Application No.: US16327758Application Date: 2017-08-28
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Publication No.: US10602110B2Publication Date: 2020-03-24
- Inventor: Cheng-Chi Li , Guan-Ming Su
- 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
- Priority: EP16185961 20160826
- International Application: PCT/US2017/048860 WO 20170828
- International Announcement: WO2018/039665 WO 20180301
- Main IPC: H04N9/68
- IPC: H04N9/68 ; G06T5/00 ; H04N9/64 ; H04N9/77 ; H04N17/02

Abstract:
Methods and systems for chroma reshaping are applied to images or video frames. The method comprises receiving at least one image or video frame. The color space of the at least one image or video frame is partitioned in M1×M2×M3 non-overlapping bins. For each bin it is determined whether it is a valid bin, for which the at least one image or video frame has at least one pixel with a color value falling within said bin. For each chroma channel, a required number of codewords is calculated for representing two color values in said valid bin that have consecutive codewords for the respective chroma channel without a noticeable difference. At least one content-aware chroma forward reshaping function is generated based on the calculated required numbers of codewords and applied to the at least one image or video frame.
Public/Granted literature
- US20190199989A1 CHROMA RESHAPING BASED ON JUST NOTICEABLE DIFFERENCES Public/Granted day:2019-06-27
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