Patent ID: 9582862
Date: 2017-02-28
CPC Classifications: G06T

Claim:
1. A direction-adaptive image deblurring method, comprising steps of: (1) defining a minimum cost function for deblurring an image by direction-adaptive total variation regularization as follows: where u represents an image to be restored, H is a point spread function, ƒ is a degraded image, λ is a regularization parameter and λ>0, ∥{right arrow over (a)}·∇u∥ · is a vector dot product operator, is an inner product operator, log is a logarithmic function, and represents calculating a minimum of an energy function 1, Hu−ƒ log(Hu) and outputting a corresponding u; (2) converting the unconstrained minimization problem in step (1) to a constrained problem by auxiliary variables d where d (3) obtaining a new minimum cost function from the constrained problem in step (2) by introducing penalty terms as follows: where α, β and γ are penalty parameters greater than zero; and (4) converting the minimization problem in step (3) to an alternating minimization problem about u, d