• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

计算机工程与科学

• 论文 • 上一篇    下一篇

结合区域特性的有限离散剪切波图像融合

陈清江,张彦博,柴昱洲,魏冰蔗   

  1. (西安建筑科技大学理学院,陕西 西安 710055)
  • 收稿日期:2015-08-31 修回日期:2015-12-07 出版日期:2017-02-25 发布日期:2017-02-25
  • 基金资助:

    国家自然科学基金(61403298);陕西省自然科学基金(2015JM1024)

Image fusion based on area characteristics
in finite discrete shearlet domain  
 

CHEN Qing-jiang,ZHANG Yan-bo,CHAI Yu-zhou,WEI Bing-zhe   

  1. (College of Science,Xi’an University of Architecture and Technology,Xi’an 710055,China)
  • Received:2015-08-31 Revised:2015-12-07 Online:2017-02-25 Published:2017-02-25

摘要:

为了提高多聚焦图像和红外与可见光图像的融合精度,结合有限离散剪切波变换具有良好的局部化特性及平移不变性,提出了一种基于有限离散剪切波变换(FDST)的图像梯度信息相关性因子加权与对比度相结合的融合算法。首先对严格配准后的图像进行FDST分解,得到低频子带系数和不同尺度不同方向的高频子带系数;然后对低频子带系数采用图像梯度信息相关性因子加权融合算法,高频则利用对比度将低频系数与高频系数联系起来并以对比度作为度量系数取舍的准则进行融合;最后应用有限离散剪切波逆变换重构得到融合图像,并对融合结果进行主观视觉和客观评价。实验结果表明,该算法在主观视觉效果和客观评价指标上优于其它融合算法。

关键词: 图像处理, 图像融合, 有限离散剪切波变换, 平移不变性, 对比度

Abstract:

In order to improve the accuracy of multi-focus image and infrared visible image fusion, based on the advantages of the good localization and shift invariance of the finite discrete shearlet transform, we propose a new image fusion algorithm, called FDST, which combines contrast with image gradient information correlation factor. Firstly, the FDST decomposes the registration images, and obtain the low frequency sub-band coefficients and high frequency sub-band coefficients of different scales and directions. The fusion principle of low frequency sub-band coefficients bases on the method of image gradient information correlation factor for weighting. The high frequency sub-band coefficients combine the high frequency and low frequency sub-band coefficients with contrast, and uses contrast as the criterion for choosing metric coefficients which is taken as the fusion rule. Finally, the low frequency information and high frequency information are reconstructed to obtain a fused image by the finite discrete shearlet inverse transform, and both subjective visual evaluation and objective performance assessments of the fusion results are implemented. The results indicate that the algorithm is superior to other fusion algorithms in subjective visual effects and objective evaluation.
 

Key words: image processing, image fusion, finite discrete shearlet transform, shift-invariant, contrast