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公开(公告)号：US20190082138A1
公开(公告)日：2019-03-14
申请号：US15701388
申请日：2017-09-11
Applicant: Apple Inc.
Inventor： Hao Pan , Munehiro Nakazato , Qiang Wang , Vaidyanath Mani , Xiaohua Yang , Xin Wang , Xuemei Zhang , Yingjun Bai
Abstract: Techniques for adjusting formats of images and video are presented, for example where an SDR source is presented on an HDR display, or vice versa. Techniques include deriving a conversion profile for image data where the conversion profile is responsive to parameters describing characteristics of a domain of source image data and characteristics of a domain of a target rendering environment. Some techniques include creating a tone curve from weighted basis functions.
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公开(公告)号：US11473971B2
公开(公告)日：2022-10-18
申请号：US16586411
申请日：2019-09-27
Applicant: Apple Inc.
Inventor： Xiaohua Yang , Ruiqi Hu , Hao Pan , Vaidyanath Mani , Qiang Wang , Haiyan He , Xin Wang , Gui Xie , Jin Wook Chang
Abstract: A device comprises memory, a display characterized by a display characteristic, and processors coupled to the memory. The processors execute instructions causing the processors to receive data indicative of the display characteristic, data indicative of ambient lighting, and data indicative of content characteristics for a content item; determine a tone mapping curve for the content item based on the data indicative of content characteristics; determine a first, so-called “anchor” point along the tone mapping curve; modify a first portion of the tone mapping curve below the anchor point based on the data indicative of ambient lighting; modify a second portion of the tone mapping curve above the anchor point based on the data indicative of the display characteristic; perform tone mapping for the content item based on the modified toned mapping curve to obtain a tone mapped content item; and cause the display to display the tone mapped content item.
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公开(公告)号：US20210096023A1
公开(公告)日：2021-04-01
申请号：US16586411
申请日：2019-09-27
Applicant: Apple Inc.
Inventor： Xiaohua Yang , Ruiqi Hu , Hao Pan , Vaidyanath Mani , Qiang Wang , Haiyan He , Xin Wang , Gui Xie , Jin Wook Chang
Abstract: A device comprises memory, a display characterized by a display characteristic, and processors coupled to the memory. The processors execute instructions causing the processors to receive data indicative of the display characteristic, data indicative of ambient lighting, and data indicative of content characteristics for a content item; determine a tone mapping curve for the content item based on the data indicative of content characteristics; determine a first, so-called “anchor” point along the tone mapping curve; modify a first portion of the tone mapping curve below the anchor point based on the data indicative of ambient lighting; modify a second portion of the tone mapping curve above the anchor point based on the data indicative of the display characteristic; perform tone mapping for the content item based on the modified toned mapping curve to obtain a tone mapped content item; and cause the display to display the tone mapped content item.
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