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Erschienen in:
2016 | OriginalPaper | Buchkapitel
30. Halftone Image Quality Evaluation Based on Reconstruction Index Model
verfasst von : Xiao Zhou, Ruizhi Shi, Da Li, Shenghui Li, Yusheng Wang
Erschienen in: Advanced Graphic Communications, Packaging Technology and Materials
Verlag: Springer Singapore
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Abstract
Halftone algorithm is the medium of the conversion from continuous digital image to scattered dot image, and it is the core technique of RIP prepress. Different algorithms have different characters on image nonlinear reconstruction, while corresponding halftone images have different effects. The advantages and disadvantages of halftone algorithm will determine printing images’ output quality. In this paper, founded reconstruction index models are used to make objective evaluation on halftone algorithms. Quantitative study is performed on the aspect of gray level index, contrast level index, and image entropy difference. Frequency domain analysis and power spectrum analysis are also performed on respective halftone images. Through halftone image quality evaluation, advantage and disadvantage comparison of halftone algorithms based on different indexes is obtained, which provides reference for the amelioration of halftone algorithm and finally improves vision quality of printing image.