一阶及二阶调频加网频谱特性及频率传递分析

doi:10.7517/j.issn.1674-0475.2009.05.373

影像科学与光化学 ›› 2009, Vol. 27 ›› Issue (5): 373-378.DOI: 10.7517/j.issn.1674-0475.2009.05.373

一阶及二阶调频加网频谱特性及频率传递分析

文卫¹, 金杨²

1. 天津科技大学, 包装与印刷工程学院, 天津, 300222;
2. 北京印刷学院, 印刷与包装工程学院, 北京, 102600

收稿日期:2009-04-27 修回日期:2009-05-31 出版日期:2009-09-23 发布日期:2009-09-23
通讯作者: 金杨(1961-), 男, 教授, 从事印前图像信息处理研究.

Analysis on the Spectral and Frequency-Transform Characteristics of 1^st and 2^nd Order FM Screening

WEN Wei¹, JIN Yang²

1. Tianjin University of Science and Technology, College of Packaging &Printing Engineering, Tianjin 300222;
2. Beijing Institute of Graphic Communication, College of Printing and Packaging Engineering, Beijing 102600

Received:2009-04-27 Revised:2009-05-31 Online:2009-09-23 Published:2009-09-23

摘要/Abstract

摘要： 为了获取不同类型调频加网对图像细节的传递能力和特性,应用快速傅立叶变换(FFT)分别对Photoshop的误差扩散法一阶调频及KODAK Stacca-to二阶调频加网图像进行了频谱分析.分析结果表明:Staccato二阶调频加网具有较为对称均匀的频谱分布;在对不同频率空间正弦波的传递方面,两种调频加网的传递能力接近.

关键词: 调频加网, 频谱分析, 频率传递

Abstract: In order to obtain the frequency-transform characteristics of different types of FM screening,by using of FFT,the frequency spectra of 1^st order FM Screening(Photoshop “Error Diffusion Dither”),and the 2^nd order FM screening(KODAK "Staccato") are analyzed.The result shows that Staccato Screening has a relative symmetrical spectral distribution.The two types of FM screening have a close capability in frequency transform.

Key words: FM screening, spectral analysis, frequency transform

中图分类号:

TQ57

文卫, 金杨. 一阶及二阶调频加网频谱特性及频率传递分析[J]. 影像科学与光化学, 2009, 27(5): 373-378.

WEN Wei, JIN Yang. Analysis on the Spectral and Frequency-Transform Characteristics of 1^st and 2^nd Order FM Screening[J]. Imaging Science and Photochemistry, 2009, 27(5): 373-378.

一阶及二阶调频加网频谱特性及频率传递分析

Analysis on the Spectral and Frequency-Transform Characteristics of 1^st and 2^nd Order FM Screening

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一阶及二阶调频加网频谱特性及频率传递分析

Analysis on the Spectral and Frequency-Transform Characteristics of 1st and 2nd Order FM Screening

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Analysis on the Spectral and Frequency-Transform Characteristics of 1^st and 2^nd Order FM Screening