Invention Grant
- Patent Title: Automatic tone mapping for cameras
- Patent Title (中): 相机自动色调映射
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Application No.: US12479629Application Date: 2009-06-05
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Publication No.: US08358351B2Publication Date: 2013-01-22
- Inventor: Ralph Brunner , Mark Zimmer , Guy Cote
- Applicant: Ralph Brunner , Mark Zimmer , Guy Cote
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Wong, Cabello, Lutsch, Rutherford & Brucculeri, L.L.P.
- Main IPC: H04N5/228
- IPC: H04N5/228 ; H04N5/202

Abstract:
A device, method, computer useable medium, and processor programmed to automatically generate tone mapping curves in a digital camera based on image metadata are described. By examining image metadata from a digital camera's sensor, such as the light-product, one can detect sun-lit, high-light, and low-light scenes. Once the light-product value has been calculated for a given image, a tone mapping curve can automatically be generated within the sensor and adjusted appropriately for the scene based on predetermined parameters. Further, it has been determined that independently varying the slopes of the tone mapping curve at the low end (S0) and high end (S1) of the curve results in more visually appealing images. By dynamically and independently selecting S0 and S1 values based on image metadata, more visually pleasing images can be generated.
Public/Granted literature
- US20100309346A1 AUTOMATIC TONE MAPPING FOR CAMERAS Public/Granted day:2010-12-09
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