发明申请
- 专利标题: Quality Assessment for Images that Have Extended Dynamic Ranges or Wide Color Gamuts
- 专利标题(中): 具有扩展动态范围或宽色域的图像的质量评估
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申请号: US14009773申请日: 2012-04-12
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公开(公告)号: US20140022460A1公开(公告)日: 2014-01-23
- 发明人: Zhen Li , Walter Gish
- 申请人: Zhen Li , Walter Gish
- 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/US12/33318 WO 20120412
- 主分类号: H04N9/64
- IPC分类号: H04N9/64 ; H04N17/02
摘要:
A first video signal is accessed, and represented in a first color space with a first color gamut, related to a first dynamic range. A second video signal is accessed, and represented in a second color space of a second color gamut, related to a second dynamic range. The first accessed video signal is converted to a video signal represented in the second color space. At least two color-related components of the converted video signal are mapped over the second dynamic range. The mapped video signal and the second accessed video signal are processed. Based on the processing, a difference is measured between the processed first and second video signals. A visual quality characteristic relates to a magnitude of the measured difference between the processed first and second video signals. The visual quality characteristic is assessed based, at least in part, on the measurement of the difference.