(a)

(b)

(c)

(d)

(e)

(f)

Figure 3: Detail of restoring noisy Elaine image (512 × 512) with different filters. (a) Original image; (b) noisy image, PSNR = 20.0742; (c) median, PSNR = 26.4554; (d) averaging, PSNR = 27.6876; (e) wiener, PSNR = 26.7866; (f) TVM, PSNR = 30.0919.