发明申请
US20100208143A1 APPARATUS AND METHODS FOR BOOSTING DYNAMIC RANGE IN DIGITAL IMAGES
有权
用于在数字图像中提升动态范围的装置和方法
- 专利标题: APPARATUS AND METHODS FOR BOOSTING DYNAMIC RANGE IN DIGITAL IMAGES
- 专利标题(中): 用于在数字图像中提升动态范围的装置和方法
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申请号: US12516235申请日: 2007-11-27
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公开(公告)号: US20100208143A1公开(公告)日: 2010-08-19
- 发明人: Francesco Banterle , Patrick Ledda , Kurt Debattista , Alan Chalmers
- 申请人: Francesco Banterle , Patrick Ledda , Kurt Debattista , Alan Chalmers
- 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
- 国际申请: PCT/US07/24498 WO 20071127
- 主分类号: H04N5/52
- IPC分类号: H04N5/52
摘要:
A method for increasing dynamic range of original image data representing an image comprises applying an expansion function to generate from the original image data expanded data having a dynamic range greater than that of the original image data and, obtaining an expand map comprising data indicative of a degree of luminance of regions associated with pixels in the image. The method then combines the original image data and the expanded data according to the expand map to yield enhanced image data. Apparatus for boosting the dynamic range of image data comprises a dynamic range expander that produces expanded data, a luminance analyzer that produces an expand map and a combiner that combines the original and expanded data according to a variable weighting provided by the expand map.
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