发明授权
- 专利标题： Content metadata enhancement of high dynamic range images
- 专利标题（中）： 高动态范围图像的内容元数据增强
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申请号： US13885662申请日： 2011-11-17
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公开(公告)号： US09275605B2公开(公告)日： 2016-03-01
- 发明人: Peter W. Longhurst , Lewis Johnson , Neil W. Messmer
- 申请人： Peter W. Longhurst , Lewis Johnson , Neil W. Messmer
- 申请人地址： US CA San Francisco
- 专利权人： Dolby Laboratories Licensing Corporation
- 当前专利权人： Dolby Laboratories Licensing Corporation
- 当前专利权人地址： US CA San Francisco
- 代理商 John Carpenter
- 国际申请： PCT/US2011/061112 WO 20111117
- 国际公布： WO2012/071235 WO 20120531
- 主分类号： G09G5/00
- IPC分类号： G09G5/00 ; G09G5/02 ; H04N1/46 ; H04N1/64 ; H04N19/46 ; H04N19/184 ; G06T5/00 ; H04N19/30 ; H04N19/85
摘要：
Image data is encoded for distribution in a lower bit-depth format. The image data has a range that is less than a maximum range and is mapped to the lower bit depth format using a mapping such that a ratio of a range of the lower bit depth representation to a maximum range of the lower bit depth representation is greater than a ratio of the range of the image data to a maximum range of the image data. Metadata characterizing the mapping is associated with lower bit depth representation. The metadata may be used downstream to reverse the mapping so that tonal detail is better reproduced.
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