激光光源数字电影放映用投影系统散斑对比度的试验测量和不确定度分析
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摘要
随着数字电影技术和新型显示技术的快速发展,为了配合未来电影行业应用高动态范围(HDR)、宽色域(WCG)技术,采用激光光源的数字电影放映用投影系统已成为技术研发、行业应用、系统设备升级改造的热点领域。激光散斑对比度是影响数字电影放映用投影系统性能的关键参数,同时也是采用激光光源放映技术影响画面主观观感的最主要原因,对激光散斑对比度的定量测量评估是电影技术领域近年来的关注焦点之一。本文对激光散斑的成因及评估方法进行了研究,提出了一种激光散斑对比度测量试验方法,开展了实际测量试验和数据分析,并对本方法的测量不确定度进行了探索性的分析。本文将为电影行业标准《数字电影放映用投影机系统技术要求和测量方法》的制定提供散斑对比度测量技术方案。
With the rapid development of digital cinema and new display technologies,application of digital cinema projector system with laser light source has become a key technical research field and hot topic in the procedure of digital cinema industry upgrade,so as to adapt the obvious trend of the application of HDR and WCG technologies.In the assessment on projector system,speckle contrast derived from laser light source is a key parameter,which observably affects projection performance and subjective perception.Quantitative evaluation on speckle contrast is one of the focuses of digital cinema measurement methodology research area.This paper analyzes the causes of the laser speckle,and its test methods as well.We proposes a laser speckle contrast measurement method based on a number of actual pilot measurements and data analysis.Moreover,we attempt to implement the uncertainty algorithm analysis on speckle contrast measurement.The research results can provide a feasible proposal on speckle contrast measurement,which may be applied to China in the setting-up process industry standard " Technical requirements and methods of measurement on projector system for digital cinema projection".
With the rapid development of digital cinema and new display technologies,application of digital cinema projector system with laser light source has become a key technical research field and hot topic in the procedure of digital cinema industry upgrade,so as to adapt the obvious trend of the application of HDR and WCG technologies.In the assessment on projector system,speckle contrast derived from laser light source is a key parameter,which observably affects projection performance and subjective perception.Quantitative evaluation on speckle contrast is one of the focuses of digital cinema measurement methodology research area.This paper analyzes the causes of the laser speckle,and its test methods as well.We proposes a laser speckle contrast measurement method based on a number of actual pilot measurements and data analysis.Moreover,we attempt to implement the uncertainty algorithm analysis on speckle contrast measurement.The research results can provide a feasible proposal on speckle contrast measurement,which may be applied to China in the setting-up process industry standard " Technical requirements and methods of measurement on projector system for digital cinema projection".
引文
[1]王硕.激光照明系统的散斑抑制[D].长春理工大学.
[2]数字影院质量-第1部分:银幕亮度等级、色度和均匀度.ISO 26431-1∶2008.
[3]行业标准《数字电影放映用投影机系统技术要求和测量方法》(征求意见稿).
[2]数字影院质量-第1部分:银幕亮度等级、色度和均匀度.ISO 26431-1∶2008.
[3]行业标准《数字电影放映用投影机系统技术要求和测量方法》(征求意见稿).