This letter introduces color constancy and Retinex theory for image enhancement.It clas- sifies Retinex algorithms into four categories and provides their principles and implementations in general.The experimental res...This letter introduces color constancy and Retinex theory for image enhancement.It clas- sifies Retinex algorithms into four categories and provides their principles and implementations in general.The experimental results of Frankle-McCann,MSR (Multi-Scale Retinex) and PNSD (Pro- jected Normalized Steepest Descent) Retinex algorithms are presented and compared.Moreover, variance and average gradient are proposed to evaluate the performance of the different algorithms.展开更多
在分析、总结高校科研项目特征的基础上,提出一种基于生命周期的科研项目管理模型:科研项目全生命周期管理(All Life Cycle Management For S&R Project);通过这种方式可以达到对科研项目从人员、文档、专家、成果、过程等多维度全...在分析、总结高校科研项目特征的基础上,提出一种基于生命周期的科研项目管理模型:科研项目全生命周期管理(All Life Cycle Management For S&R Project);通过这种方式可以达到对科研项目从人员、文档、专家、成果、过程等多维度全面管理,有利于科研管理工作的有效开展.展开更多
文摘This letter introduces color constancy and Retinex theory for image enhancement.It clas- sifies Retinex algorithms into four categories and provides their principles and implementations in general.The experimental results of Frankle-McCann,MSR (Multi-Scale Retinex) and PNSD (Pro- jected Normalized Steepest Descent) Retinex algorithms are presented and compared.Moreover, variance and average gradient are proposed to evaluate the performance of the different algorithms.
