DocumentCode
49604
Title
Grid adaptive interpolation filters
Author
Chee Sun Won
Author_Institution
Dept. of Electron. & Electr. Eng., Dongguk Univ. - Seoul, Seoul, South Korea
Volume
49
Issue
3
fYear
2013
fDate
Jan. 31 2013
Firstpage
181
Lastpage
182
Abstract
A general framework for image interpolation in a uniformly spaced image grid is presented. The proposed formulation is suitable for representing fractional (or sub-pixel) pixels as well as integer pixel interpolations. Also, by fitting an interpolation kernel to the grid formulation, finite impulse response filter coefficients can be readily determined for a given sampling interval and filter length. As an example, a four-tap lowpass filter is derived by fitting the Lagrange interpolation kernel to a row (or column) expansion by 2 on integer pixel locations.
Keywords
image representation; image sampling; interpolation; low-pass filters; transient response; Lagrange interpolation kernel; finite impulse response filter coefficients; four-tap lowpass filter; fractional pixel representation; fractional sub-pixel representation; grid adaptive interpolation filters; grid formulation; image interpolation; integer pixel interpolations; integer pixel locations; sampling interval; uniformly spaced image grid;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2012.2481
Filename
6457557
Link To Document