Image Reconstruction from Multiscale Singular Points Based on the Dual-Tree Complex Wavelet Transform

Table 4

PSNR (dB) of reconstructed images with various intensities of white Gaussian noise added to the original image (values in brackets are PSNR gains relative to PSNRs of the original image).

Image	“Boat”			“Elaine”			“Peppers”
k	0.01	0.05	0.1	0.01	0.05	0.1	0.01	0.05	0.1
Proposed algorithm	24.85 (4.78)	22.45 (3.38)	18.81 (1.78)	25.77 (5.72)	23.06 (3.87)	19.22 (1.98)	25.03 (4.86)	22.54 (3.50)	18.87 (1.81)
Mean - value filter [34]	21.53 (1.48)	18.61 (-0.46)	17.82 (0.79)	23.53 (3.48)	22.54 (3.35)	18.92 (1.68)	23.25 (3.08)	21.81 (2.67)	18.34 (1.28)
Median-value filter [35]	22.67 (2.60)	20.23 (1.16)	18.57 (1.54)	24.25 (4.20)	22.91 (3.72)	19.05 (1.81)	24.70 (4.53)	21.79 (2.65)	18.63 (1.57)
Wiener filter [36]	22.58 (2.51)	20.02 (0.95)	18.14 (1.11)	24.65 (4.60)	22.73 (3.54)	19.15 (1.91)	24.61 (4.44)	21.85 (2.71)	18.42 (1.36)