A Variational Framework for Retinex

@article{Kimmel2004AVF,
  title={A Variational Framework for Retinex},
  author={Ron Kimmel and Michael Elad and Doron Shaked and Renato Keshet and Irwin Sobel},
  journal={International Journal of Computer Vision},
  year={2004},
  volume={52},
  pages={7-23}
}
Retinex theory addresses the problem of separating the illumination from the reflectance in a given image and thereby compensating for non-uniform lighting. This is in general an ill-posed problem. In this paper we propose a variational model for the Retinex problem that unifies previous methods. Similar to previous algorithms, it assumes spatial smoothness of the illumination field. In addition, knowledge of the limited dynamic range of the reflectance is used as a constraint in the recovery… 

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