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计算机工程

• 图形图像处理 • 上一篇    下一篇

视觉传感网中基于二次规划的图像压缩感知

周钦青,陈遵德   

  1. (顺德职业技术学院电子与信息工程系,广东 佛山 528333)
  • 收稿日期:2013-01-16 出版日期:2014-03-15 发布日期:2014-03-13
  • 作者简介:周钦青(1981-),女,讲师、硕士,主研方向:图像处理与分析,信息安全;陈遵德,教授、博士。
  • 基金资助:
    广东省信息技术教指委立项基金资助项目(XXJS-2013-35);顺德职业技术学院教改基金资助项目(2012-SZJGXM20)。

Image Compressed Sensing Based on Quadratic Programming in Visual Sensor Networks

ZHOU Qin-qing, CHEN Zun-de   

  1. (Department of Electronic and Information Engineering, Shunde Polytechnic College, Foshan 528333, China)
  • Received:2013-01-16 Online:2014-03-15 Published:2014-03-13

摘要: 为降低视觉传感网络中图像压缩感知算法的计算复杂度,提出一种基于二次规划的网络图像恢复算法。该算法将压缩感知重构中的欠定线性方程组求解问题,转化为有界约束二次规划问题,在此基础上结合阿米霍步长准则,设计一种压缩感知图像恢复算法,通过求解二次规划问题对网络图像数据进行恢复。理论分析和仿真结果表明,与传统图像压缩感知算法相比,该算法可减少约1/3的图像数据恢复运算时间,且图像重构质量提高3 dB~6 dB,有效提高了视觉传感器网络图像恢复算法的实时性。

关键词: 视觉传感网, 压缩感知, 图像恢复, 二次规划, 有界约束, 实时性

Abstract: For reducing the computational complexity of Compressed Sensing(CS) in Visual Sensor Networks(VSN), an image recovery algorithm based on quadratic programming is proposed. The under-determined linear equations in CS recovery are solved by bound-constrained quadratic programming, and an image recovery algorithm is designed based on the armijo rule. Theory analysis and experimental results show that the proposed algorithm can reduce 1/3 operation time of image recovery, and enhance the recovery quality by 3 dB~6 dB, thus significantly improve the real-time performance of image recovery in VSN.

Key words: Visual Sensor Networks(VSN), Compressed Sensing(CS), image recovery, quadratic programming, bound-constrained, real-time performance

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