摘要
默里-戴维斯公式以及尤尔-尼尔逊公式都可以确定网点密度与网点面积率的关系,常在计算网点面积率、分析网点扩大、进行工艺参数识别(制版时的曝光控制、印刷时的压力调节等)与优化等工艺实践中应用广泛。实践中人们更趋于应用后者,认为其结果更接近现实。针对这一认识误区,通过理论分析和仿真实验,揭示了尤尔-尼尔逊公式存在理论误差,在不考虑工艺因素影响下,该公式只在极少数密度点无计算误差,在其余点均存在非线性误差。
Murray-Davies and Yule-Nielsen formula can confirm the relationship between the dot density and dot area ratio,it is used widely to formulate dot area ratio,analyze dot gain,distinguish the technological parameter（exposure control in plate making,express pressure adjustment in printing）and optimizing.In practice,the people prefer to the latter and regard the result as the reality.But this paper via theoretical analysis and simulated experiment reveals that there exist theoretical errors in Yule-Nielsen formula,and in the case of non-considering the technological element influence,there exist no calculation errors in only a few density dots,and there exist the nonlinear errors in the rest of other dots.
出处
《西安理工大学学报》
CAS
北大核心
2012年第1期67-71,共5页
Journal of Xi'an University of Technology
基金
陕西省教育厅专项科研计划研究项目(2010JK706)
