文章摘要
孔玲君,刘真.基于空间频率响应的印刷品清晰度检测[J].包装工程,2013,34(15):120-125,134.
KONG Ling-jun,LIU Zhen.Measurement of Prints Sharpness Based on Spatial Frequency Response[J].Packaging Engineering,2013,34(15):120-125,134.
基于空间频率响应的印刷品清晰度检测
Measurement of Prints Sharpness Based on Spatial Frequency Response
投稿时间:2013-04-24  修订日期:2013-08-10
DOI:
中文关键词: 印刷品清晰度  客观检测  空间频率响应  对比度敏感函数
英文关键词: prints sharpness  objective measurement  spatial frequency response  contrast sensitive function
基金项目:新闻出版总署数字印刷工程研究中心基金项目
作者单位
孔玲君 1. 南京林业大学江苏省制浆造纸科学与技术重点实验室, 南京210037
2. 上海出版印刷高等专科学校, 上海200093 
刘真 南京林业大学江苏省制浆造纸科学与技术重点实验室, 南京210037 
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中文摘要:
      利用CCD 图像捕获设备,把印刷测试图转换为数字图像,采用基于倾斜边缘梯度分析的空间频率响应检测算法,测量获得了印刷复制系统的空间频率响应特性,并把经过人眼视觉系统滤波后得到的空间频率响应曲线内的面积作归一化处理后,所获得的测量值作为清晰度质量描述因子。实验结果表明,清晰度质量描述因子能较好地反映印刷品的清晰度复制质量,提供了一种新的客观、定量检测印刷品清晰度的方法,为实现印刷品质量的自动化检测与评价提供了有力的技术支持。
英文摘要:
      CCD-based input device was used to convert printing test pattern to digital image. Spatial frequency response characteristics of the printing system were obtained by measurement using spatial frequency response measurement algorithm based on incline edge gradient analysis. The area in spatial frequency response curve obtained from human vision system filtering was normalization processed and the result was used as sharpness quality factor. Experimental results indicated that the sharpness quality factor well reflects the reproduction effect of the prints sharpness, and offers a new way to measure prints sharpness objectively and quantitatively. The purposed was to provide technical support for automatic measurement and evaluation of printing quality.
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