A New Fast Algorithm for Constrained Four-Directional Total Variation Image Denoising Problem

Table 1

PSNR (dB) for GP, FGP, TGV, NLTV, 4-GP, and 4-FGP on different images (“Lena,” “Woman,” and “Louvre” images, standard deviation of zero-mean Gaussian white noise 0.1 and ).

Image	Noisy image	GP	FGP	TGV	NLTV	4-GP	4-FGP
Lena	20.43	26.22	26.23	26.55	26.60	26.67	26.67
Woman	20.50	27.48	27.48	27.70	27.78	28.39	28.38
Louvre	20.35	27.02	27.02	26.91	27.45	27.50	27.49