一种适用于柱镜光栅立体印刷图的柱形网点模型  

A Kind of Columnar Halftone Dot Model Suitable for Lenticular Screen Stereo Press Image

作　　者：史瑞芝[1] 安敬[1] 汶建龙[1] 曹朝辉[1] 孙东振[1] 

机构地区：[1]信息工程大学测绘学院,郑州450052

出　　处：《中国印刷与包装研究》2009年第2期26-32,共7页China Printing Materials Market

摘　　要：本文论述了柱镜光栅立体印刷图的构图方法与特点,从微观结构上分析了该图种采用常规加网技术产生的图像清晰度低、立体感弱的内部机理,提出了光栅立体图加网必须遵守"在每个光栅栅距内,从每幅视图上获取的各列像素的灰度值应保持其相对独立性"的构图原则,并给出了柱形网点结构模型。该网点模型是一个由m行n列像素组成的网点单元,行数m由输出设备分辨率和立体图的观看距离确定,列数n由光栅线数、设备的输出分辨率以及视图的数量确定,网点生长大小由图像灰度值进行控制,计算误差用误差扩散法进行补偿。考虑到各色版网点叠印的最佳状态,对于不同色版采用不同的网点生长模式。该网点模型能够有效提高印品的清晰度和立体感,具有较好的应用前景。This paper dissertates the making method of lenticular screen stereo presswork and its characteristics. On the basis of analyzing the inside mechanism of low definition and stereo sensitivity of the regular screening, the rule which the stereo screen presswork should obey, is putting forward. According to this rule, the pixel gray scale getting from each row of the image in each screen distance, should keep independence. And then the model of columnar dot structure is brought forward. This model is the dot units composed of m rows and n columns. The m is decided by the device＇s resolution and the apparent distance of the image. And the n is decided by screen resolution, output resolution of device and image amount. The size of the dot can be controlled by pixel gray scale of the image. The error of calculation can be compensated by the error-diffusion method. Considering the overprint state of each plate, we can use different dot making models. This dot model can efficiently improve the definition and stereo sensitivity of press production and has widely use prospect.

关 键 词：柱镜光栅立体 柱形网点 误差补偿 

分 类 号：TS876[轻工技术与工程]