| 一阶及二阶调频加网频谱特性及频率传递分析 |
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| 引用本文： | 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]. 感光科学与光化学, 2009, 0(5) |
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| 作者姓名： | 文卫 金杨 |
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| 作者单位： | 天津科技大学包装与印刷工程学院;北京印刷学院印刷与包装工程学院; |
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| 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.
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| 关 键 词： | 调频加网 频谱分析 频率传递 |
Analysis on the Spectral and Frequency-Transform Characteristics of 1~(st) and 2~(nd) Order FM Screening |
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| WEN Wei,JIN Yang. Analysis on the Spectral and Frequency-Transform Characteristics of 1~(st) and 2~(nd) Order FM Screening[J]. Photographic Science and Photochemistry, 2009, 0(5) |
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| Authors: | WEN Wei JIN Yang |
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| Affiliation: | 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 |
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| Abstract: | In order to obtain the frequency-transform characteristics of different types of FM screening,by using of FFT,the frequency spectra of 1st order FM Screening(Photoshop "Error Diffusion Dither"),and the 2nd 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. |
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| Keywords: | FM screening spectral analysis frequency transform |
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