NON-LOCAL MEAN FILTER

Non linear filter which exploits similarities between different patches of the image

$$O(p)=\sum _{p\in S}w(p,q)I_{q}where$$ $$w(p,q)=\frac{1}{Z(p)}{e}^{-\frac{\Vert N_p-N_q{\Vert }_2^2}{h^2}}$$ $$Z(p)=\sum _{q\in I}{e}^{\frac{\Vert N_p-N_q{\Vert }_2^2}{h^2}}$$

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