Invention Grant
- Patent Title: Hue preservation post processing for highlight recovery
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Application No.: US16121389Application Date: 2018-09-04
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Publication No.: US11100620B2Publication Date: 2021-08-24
- Inventor: Touraj Tajbakhsh , Chihsin Wu , Frederic Cao
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Fenwick & West LLP
- Main IPC: G06T5/00
- IPC: G06T5/00 ; H04N9/64 ; G06T7/90

Abstract:
Embodiments relate to hue preservation post processing for highlight recovery of an input image. Intensity values for multiple color channels of a plurality of color channels of a pixel of the input image is determined using corresponding ratios of target hues for the plurality of color channels of the pixel, wherein the pixel has at least one color channel with an intensity above a predetermined threshold. A hue preserved value for a color channel of the plurality of color channels of the pixel is determined using intensity values determined for the plurality of color channels of the pixel and the target hues. A recovered version of the input image is generated by adjusting hue information of the pixel, using the hue preserved value for the channel of the plurality of color channels of the pixel.
Public/Granted literature
- US20200074601A1 HUE PRESERVATION POST PROCESSING FOR HIGHLIGHT RECOVERY Public/Granted day:2020-03-05
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