基于蒙特卡罗方法思想, 结合半色调印刷品网点的结构属性, 提出一种研究半色调印刷品呈色性质的模拟方法。考虑光的粒子属性, 以程序化语言描述光子在半色调印品中的传播历程, 涵盖光子从入射到传播终止的全过程, 体现承印物、油墨、网点形状以及面积率变化对光散射行为的影响。对175 lpi的不同网点结构模拟结果表明: 该算法能合理模拟光与印品相互作用, 适用于光子在多种网点结构中的散射模拟。模拟后的光子能量及位置分布均能可视化显示, 经统计分析可转化为反射率、光子分布, 散射距离等信息, 为半色调印品的微观研究及质量控制提供一种新思路。

The simulation of light propagation in halftone prints within the Monte Carlo method is provided, considering the structural characteristics of halftone prints. This simulation model describes the whole route of photons propagation in mathematical language, illustrating a real-scattering effect, which is applicable to various dot structures. The 175 lpi simulation results showed that: the model can reasonably simulate the interaction of light with printed materials, which was suit to various dots. Simulated distribution of energy and location was visible. Statistical analysis could be converted to reflectance, scattering distance information, which provides a new idea to research and control for microscopic halftone prints.