Title :
Adaptive image interpolation based on local gradient features
Author :
Hwang, Jung Woo ; Lee, Hwang Soo
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., South Korea
fDate :
3/1/2004 12:00:00 AM
Abstract :
This letter presents two adaptive interpolation methods based on applying an inverse gradient to conventional bilinear and bicubic interpolation. In simulations, the proposed methods exhibited a better performance than conventional bilinear and bicubic methods, particularly in the edge regions. In addition, the proposed methods can be used irrespective of the magnification factor (MF) and easily implemented due to their simple structure.
Keywords :
adaptive signal processing; gradient methods; image enhancement; image reconstruction; interpolation; adaptive image interpolation; image enhancement; image reconstruction; local gradient features; magnification factor; Digital images; Image reconstruction; Image resolution; Interpolation; Laplace equations; Nearest neighbor searches; PSNR; Pixel; Signal resolution; Two dimensional displays;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2003.821718
