| 摘要: |
| 首先,基于人眼对输出结果的主观感受,将权值抖动算法与传统误差扩散算法进行了对比研究。 通过研究发现:权值组内抖动的算法效果略优于传统 Floyed-Steinberg 算法,在一定程度上减小了伪轮廓和提高了边缘的锐利程度,但滞后现象没有得到很好解决。 其次,使用该算法输出了不同灰度级的均匀灰度块,分析了输出后的径向平均功率谱和各向异性程度,并对比了实际视觉效果,得出了半色调输出质量与频率谱和对称性的关系,最终提出了提高半色调输出质量的算法研究方向。 |
| 关键词: 误差扩散 权值抖动 径向平均功率谱 各向异性 |
| DOI： |
| 分类号:TS801. 3; TS807 |
| 基金项目:2012 年度河南省教育厅自然科学研究重点项目 ( 12A510004 ) 资助;2011 年河南省科技厅科技攻关计划项目(112102210017)资助;2013 年河南工程学院博士基金项目资助 |
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| Research on Error Diffusion Algorithm Based on Weights Perturbation |
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ZHU Ming1, LI Yu2
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1.Henan Institute of Engineering, Zhengzhou 450007, China;2.Press and Publication School of Henan Province,Zhengzhou 450007, China
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| Abstract: |
| Comparative study was carried out on the error diffusion algorithm based on weight perturbation and conventional error diffusion algorithm. The result indicated that the effect of the error diffusion algorithm with four perturbation weights is little batter than Floyed-Steinberg; this algorithm reduces the pseudo outline and sharpens the image edge to some extent, but the pseudo outline and the hysteresis phenomenon still exist. Uniform gray patch with different level was output by the method; radial average power spectrum and anisotropy of the output result was analyzed. The effects of objective assessment and subjective assessment were compared and the relation among halftone output quality, radial average power spectrum and symmetry was obtained. The research direction of halftone algorithm to improve halftone output quality was put forward. |
| Key words: error diffusion weights perturbation radial average power spectrum anisotropy |
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