1-d B-B Spline Polynomial and Hilbert Scan for Graylevel Image Coding - Bezier and Splines in Image Processing and Machine Vision - page 77

(a) (b)

(c) (d)

(e) (f)

Fig. 3.8. Comparison of Lena image: (a) Algorithm 1: bpp = 1.44, PSNR = 30.577;
(b) Kamata: bpp = 1.45, PSNR = 30.019; (c) Algorithm 2: bpp = 1.44, PSNR =
31.222; (d) Algorithm 1: bpp = 1.28, PSNR = 29.757; (e) Kamata: bpp = 1.20,
PSNR = 29.163; (f) Algorithm 2: bpp = 1.34, PSNR = 30.821.