摘要
数字半调是数字印刷乃至现代印刷的核心技术之一。半调可使连续色调图像转换为二值图像。如需对半调图像作分类识别、图像压缩、图像增强等处理,就应先让半调图像重建为连续色调图像,即进行逆半调处理。首先介绍了半调图像的不同发展阶段;然后对已有的逆半调方法根据不同的图像恢复依据进行了分类介绍,并对重建的逆半调图像的质量进行了客观评价;最后总结了已有逆半调方法的不足,并指出了未来可改进的关键方向。
Digital halftoning is one of the core technologies in the digital printing and modern printing.Halftoning can be used to convert continuous tone images into binary images.Inverse halftoning is essential in the processing of classification recognition,image compression and image enhancement based on halftoning images.In the paper,different development stages of halftoning images were introduced above all.And then current inverse halftoning methods were classified by different image restoration gist.Next,objective evaluation about the quality of reconstructed inverse halftoning images were carried out.Lastly the deficiency of current inverse halftoning methods were summarized,along with the key directions can be improved in the future.
出处
《计算机科学》
CSCD
北大核心
2016年第S1期109-115,共7页
Computer Science
基金
国家自然科学基金(61305042)资助
关键词
图像处理
数字半调
逆半调
质量评价
Image processing
Digital halftoning
Inverse halftoning
Image quality assessment
