中国空间科学技术

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数字图像最佳插值算法研究

尤玉虎,周孝宽   

  1. 北京航空航天大学,北京航空航天大学 北京100083 ,北京100083
  • 发布日期:2005-06-25

Research of Optimal Interpolation Algorithm for Digital Image

You Yuhu Zhou Xiaokuan (Beijing University of Aeronautics and Astronautics, Beijing 100083)   

  • Online:2005-06-25

被引次数

174

摘要： 对常用的数字图像插值算法进行了深入的分析,指出双线性内插法和立方卷积法的本质是利用直接邻点的灰度值和(或)邻点间灰度值的变化率对待采样点进行内插,并在此基础上提出了最佳插值算法的公式,最后通过试验提出了最佳插值公式中权值参数的建议值。

关键词: 数字图像, 插值算法, 研究

Abstract: The physical background of the popularly used image interpolation algorithms is analyzed first in this paper. Since the cubic convolution interpolation algorithm makes use of both direct and indirect neighbor pixels around the interpolated point, it is the best interpolation algorithm among the popular used inage interpolation algorithms. But the experiment results show that in the cubic convolution interpolation algorithm the given weights of direct and indirect neighbor pixels around the interpolated point are not the best ones. A recommended best combination of the weights is given then.