Shape Preserving Interpolation Using Rational Cubic Ball Function and Its Application in Image Interpolation

Table 6

PSNR value for image upscaling.

Method/images	Boat	Cameraman	Nuvola	Lena	Thumb print
Nearest neighbor	33.85	39.42	35.94	36.10	35.40
Bilinear interpolation	34.02	39.99	36.30	36.18	35.75
Bicubic spline interpolation	34.46	39.86	36.73	37.00	35.76
Proposed method	34.45	40.08	36.75	36.64	35.82