A Bidirectional Flow Joint Sobolev Gradient for Image Interpolation

Table 1

Comparison of different interpolation algorithms using PSNR values.

Image	NEDI	LSS	FBF	BG	The proposed
Parrot (×3)	—	22.9104	25.9583	27.6972	27.8102
Old man (×3)	—	23.9840	29.2953	33.8563	33.9642
Flower1 (×2)	26.7876	28.4274	27.9264	30.4265	30.3702
Flower1 (×2)	25.9601	27.1878	26.4071	28.6159	28.7703