Li Xuchao, Ma Songyan, Bian Suxuan. Applying a hybrid regularization model in a tight frame domain to image restoration[J]. Journal of Image and Graphics, 2015, 20(12): 1572-1582. DOI: 10.11834/jig.20151202.
To overcome the texture loss and false edge caused by a bounded variation function
a mixing regularization model in a tight frame domain that protects image texture information and reduces false edge is proposed. An alternating-direction iteration multiplier algorithm is introduced. First
in the tight frame domain
for images blurred by system and Poisson noises
the fitting term is described by the Kullback-Leibler function
the mixing regularization terms are composed of the semi-norm of the bound variation function and the L norm
and the fitting and weight regularization terms constitute the energy functional regularization model. Second
the solution and uniqueness of the mixing regularization model are analyzed. Third
the minimum problem of the mixing regularization model is decomposed into four easily solved sub-problems by introducing auxiliary variables and utilizing the alternating-direction iteration multiplier algorithm. Finally
an effective optimization algorithm is constructed with the four sub-problems via alterative iteration. The mixing regularization of the tight frame domain can effectively overcome the texture information loss and false edge caused by the bound variation function. Compared with traditional algorithms
the proposed algorithm can increase the peak signal-to-noise ratio to approximately 0.1 dB to 0.7 dB. The proposed model can protect image texture information
alleviate false edges
achieve higher peak signal-to-noise ratio and structural similarity index measure
and restore images blurred by system and Poisson noises compared with other regularization models.