If you use these codes, please cite the paper:

@Article{ZhanJEI2017october,
  author =  {Zhan, Kun and Xie, Yuange and Wang, Haibo and Min, Yufang},
  title =   {Fast filtering image fusion},
  journal = {Journal of Electronic Imaging},
  year =    {2017},
  volume =  {26},
  number =  {6},
  pages =   {063004},
}

If you have any questions, Feel free to contact me. (Email: ice.echo#gmail.com)

http://www.escience.cn/people/kzhan