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auxiliary variable b, auxiliary images Bx and By (gradients w.r.t. x and y)
alternated minimization w.r.t. X and Bx, By
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![]() Let us first calculate the Fourier transform F[h4 ] and DCT[Y], and W : |
![]() The pixels b of Bx and By are independent : |
![]() The criterion is a quadratic form w.r.t. X : |
Example (64x64 image) :
X0 initialization X0 = Y X B
Bx 0, By 0 ![]()
B X
iteration 1 X1 X B
Bx 1, By 1 ![]()
B X
iteration 2 X2 etc. N iterations before convergence usually N<10
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