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A new interpretation and improvement of the nonlinear anisotropic diffusion for image enhancement

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2 Author(s)
J. Monteil ; L2Ti-Inst. Galilee, Univ. de Paris-Nord, Villetaneuse, France ; A. Beghdadi

The purpose of the article is to give an analysis of the anisotropic diffusion (AD) and propose adaptive nonlinear filtering based on a judicious choice of the conductance function (CF) and the edgeness threshold. A new undesirable effect, which we call the “pinhole effect” may result when AD is introduced for the first time. A robust solution to this effect is proposed and evaluated through experimental data. The evolution of the diffused signal is analyzed through a physical model using the optical flow technique (OFT). The overall strategy is evaluated through experimental results obtained on synthetic and actual images

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IEEE Transactions on Pattern Analysis and Machine Intelligence  (Volume:21 ,  Issue: 9 )