线条形网点图像的频谱分析  

Fourier Spectrum Analysis to Line Dot Image

作　　者：霍李江[1] 卢军[2] 田靓[2] 

机构地区：[1]大连工业大学,大连116034 [2]武汉大学,武汉430079

出　　处：《包装工程》2007年第6期16-19,共4页Packaging Engineering

基　　金：辽宁省教育厅B类项目(2020701270)

摘　　要：通过对线条形网点图像的实际打样与“欧几里得”网点打样样张的比较,重点阐述了线条形网点在印刷复制过程中的网点频率传递特性,在论述中,笔者对采用快速傅立叶变换后获得的网点叠印图像的频谱进行了较为细致地分析,得出影响人眼观察印刷图像的主要频率值及其原因。The property of the line dot used for reproduction was studied. Through making proofs, comparing with the proof of the non-line dot （ e. g. ： ＂ Euclidean＂ dot） , the property of the dot frequency transfer in the process of printing was discussed. Two different dot superimposition images processed by fast Fourier transform （FFT） are compared and analyzed particularity. The main frequency value influences the printing image observation was found and the reasons were analyzed.

关 键 词：线条形网点 快速傅立叶变换 网点频率传递特性 

分 类 号：TS871.1[轻工技术与工程]