计算机应用 ›› 2011, Vol. 31 ›› Issue (06): 1575-1577.DOI: 10.3724/SP.J.1087.2011.01575

• 图形图像技术 • 上一篇    下一篇

约束恒模医学CT图像盲均衡算法

孙云山1,2,张立毅1,2,段继忠1   

  1. 1. 天津大学 电子信息工程学院, 天津 300072
    2. 天津商业大学 信息工程学院, 天津 300134
  • 收稿日期:2010-12-01 修回日期:2011-01-14 发布日期:2011-06-20 出版日期:2011-06-01
  • 通讯作者: 孙云山
  • 作者简介:孙云山(1980-),男,山西忻州人,讲师,博士研究生,主要研究方向:盲均衡算法;张立毅(1963-),男,山西忻州人,教授,博士生导师,博士,主要研究方向:盲信号处理;段继忠(1984-),男,四川峨眉山人,博士研究生,主要研究方向:视频信号处理。
  • 基金资助:
    山西省科技攻关项目;天津商业大学青年科研培育基金项目

Research of constraint constant modulus medical CT image blind equalization algorithm

SUN Yunshan1,2,ZHANG Liyi2,3,DUAN Jizhong1   

  1. 1. School of Electric Information Engineering, Tianjin University, Tianjin 300072, China
    2. School of Information Engineering, Tianjin University of Commerce, Tianjin 300134, China
    3. School of Electric Information Engineering, Tianjin University, Tianjin 300072, China
  • Received:2010-12-01 Revised:2011-01-14 Online:2011-06-20 Published:2011-06-01
  • Contact: SUN Yunshan

摘要: 为了改善图像的峰值信噪比,提高算法的可靠性和恢复效果,利用线性变换将图像的恢复过程等效为一维盲均衡运算,建立了医学CT图像约束恒模代价函数,并分析了其凸性,提出一种基于信号降维处理的医学CT图像盲均衡算法。仿真结果验证了算法的有效性,新算法的迭代过程避免了矩阵逆运算,提高了运算效率。

关键词: 盲均衡, 恒模算法, CT图像, 代价函数

Abstract: In order to improve the Peak Signal-to-Noise Ratio (PSNR) of images, and to raise the reliability and restoration effects of the algorithm, the degradation and restoration process of image was transformed by a linear transform to be equivalent to one dimensional convolution. A constraint constant modulus cost function of blind equalization applied to medical CT images was founded, and its convexity was proved. A blind equalization algorithm based on dimension reduction was proposed. Computer simulations demonstrate the effectiveness of the algorithm. Matrix inversion is avoided to improve the efficiency of operations.

Key words: blind equalization, constant module algorithm, CT image, cost function

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