| Nikolova, M. (1999a). \Markovian reconstruction using a GNC approach", IEEE Transactions on Image Processing, 8, 9, 1204-1220. |
....matrix. Since the matrix A T A is singular and p r has its concave parts, such a condition is dicult to ful ll. Thus, some modi cations on family of relaxation p r for r near r 0 are needed. A possible way to do this is to render convexity of the initial relaxed penalty p r , as it is done in Nikolova et al. 1999) Take a number 2 (r 0 ; 1) With slight abuse of notation, modify the de nition of P r for r 2 [r 0 ; as P r ( P ( r r 0 Q( where Q( P i q(j i j) for a convex function q. In order to ensure the convexity of P r0 , Q has to compensate for the nonconvex parts of P and at the same time Q ....
Nikolova, M. (1999a). \Markovian reconstruction using a GNC approach", IEEE Transactions on Image Processing, 8, 9, 1204-1220.
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, 137-166. Nikolova, M. (1999a). \Markovian reconstruction using a GNC approach", IEEE Transactions on Image Processing,
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