Share Email Print
cover

Proceedings Paper

A subpixel algorithm using interpolation method based on normal direction
Author(s): Li Gong; Zhong Wang; Chao Li
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

As one branch of subpixel technology, curve interpolation method is the most popular for its higher precision and less complexity. But the method has longer running time and bigger direction error, since it makes use of convolution between direction templates and pixel gray values to get Gradient direction which is interpolating direction. So a new method is proposed in which unisometric cubic spline interpolation is operated along the normal direction of the edge-point. It illustrates not only how to choose sampling points for interpolation, but also how to figure node values of those points, then establishes the suitable interpolating boundary conditions. The method reduces not only the uncertainty but also the runtime to 1/2, and improves measuring precision and efficiency.

Paper Details

Date Published: 3 February 2009
PDF: 8 pages
Proc. SPIE 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, 716028 (3 February 2009); doi: 10.1117/12.806957
Show Author Affiliations
Li Gong, Tianjin Univ. (China)
Zhong Wang, Tianjin Univ. (China)
Chao Li, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 7160:
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications

© SPIE. Terms of Use
Back to Top