DocumentCode
2335585
Title
Isophote estimation by cubic-spline interpolation
Author
Wang, Qing ; Ward, Rabab ; Shi, Hongjian
Author_Institution
Dept. of Electr. & Comput. Eng., British Columbia Univ., Canada
Volume
3
fYear
2002
fDate
2002
Abstract
We apply the cubic-spline interpolation to estimate isophotes from sparsely sampled digital images. For any non-pixel, we interpolate it by cubic spline, and by solving the yielding cubic function analytically, we find positions of pixels with the same intensity value. Experiment results are given and discussed. This spreads some important light on the nature of interpolation in images and why the well-known zigzag effects are obtained when images are interpolated.
Keywords
image sampling; interpolation; splines (mathematics); cubic function; cubic-spline interpolation; equi-intensity contours; image interpolation; isophote estimation; sparsely sampled digital images; zigzag effects; Computational efficiency; Degradation; Digital images; Equations; Image analysis; Image reconstruction; Interpolation; Pixel; Shape control; Spline;
fLanguage
English
Publisher
ieee
Conference_Titel
Image Processing. 2002. Proceedings. 2002 International Conference on
ISSN
1522-4880
Print_ISBN
0-7803-7622-6
Type
conf
DOI
10.1109/ICIP.2002.1038990
Filename
1038990
Link To Document