【摘要】 为了促进地图制印及图象复制的标准化、数据化，为了实现反射密度数据的信息共享，本文以回归分析的基本原理及方法对九种反射密度计的读数进行了回归分析，导出了不同光学密度计之间的线性回归方程。检验后证明：九种密度计之间存在良好的线性相关，推导出的线性方程稳定性较好，可用于指导生产实践。更多还原

【Abstract】 :Densitometers are widely used tools in the map reproduction departments and in theGraphic Arts Industry. They enable user to determine the amount of light transmitted orreflected by an image and thereby establish whether or not the resultant image conformsto some previously established value, to within some defined tolerance, which is very im-portant for the standardization and specification of map printing. Unfortunately,the agre-ement between different densitometer readings is poor, and therefor it is not reasonableto express the differences by the standard deviation. In order to get a simple transform-ation equation of density for one densitometer to another in the acceptable level of accu-racy, in this paper the principles and procedure of reqression analysis are discussed. Theresults of analysis show that the reqression equations between nine different densitometers,regarding M-514 densitomer as the standard one, have the linear regression characters,and that the accuracy of regression equations is acceptable. They can be used in pra-ctice of map printing and image reproduction.更多还原