A subpixel algorithm using interpolation method based on normal direction

Li Gong; Zhong Wang; Chao Li

doi:10.1117/12.806957

2 February 2009 A subpixel algorithm using interpolation method based on normal direction

Li Gong, Zhong Wang, Chao Li

Proceedings Volume 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications; 716028 (2009) https://doi.org/10.1117/12.806957
Event: International Conference of Optical Instrument and Technology, 2008, Beijing, China

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.

Citation Download Citation

Li Gong, Zhong Wang, and Chao Li "A subpixel algorithm using interpolation method based on normal direction", Proc. SPIE 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, 716028 (2 February 2009); https://doi.org/10.1117/12.806957

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available