Invention Grant
- Patent Title: Constant bracket high dynamic range (cHDR) operations
- Patent Title (中): 恒定支架高动态范围(cHDR)操作
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Application No.: US14292792Application Date: 2014-05-30
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Publication No.: US09344638B2Publication Date: 2016-05-17
- Inventor: Xuemei Zhang , Marius Tico , Yingjun Bai , Farhan A. Baqai , Fabio Riccardi , Juanqing Chen , Paul M. Hubel , George E. Williams , Todd S. Sachs , Yongfang Liang
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Blank Rome LLP
- Main IPC: H04N5/225
- IPC: H04N5/225 ; H04N5/235 ; G03B7/00 ; H04N3/14 ; H04N5/335 ; H04N5/228 ; H04N5/91 ; G06K9/46 ; G06T5/00 ; H04N5/265 ; H04N5/232 ; G06T5/40

Abstract:
Systems, methods, and computer readable media to capture and process high dynamic range (HDR) images when appropriate for a scene are disclosed. When appropriate, multiple images at a single—slightly underexposed—exposure value are captured (making a constant bracket HDR capture sequence) and local tone mapping (LTM) applied to each image. Local tone map and histogram information can be used to generate a noise-amplification mask which can be used during fusion operations. Images obtained and fused in the disclosed manner provide high dynamic range with improved noise and de-ghosting characteristics.
Public/Granted literature
- US20150350513A1 Constant Bracket High Dynamic Range (cHDR) Operations Public/Granted day:2015-12-03
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