Subpixel localization of synthetic references in digital images by use of an augmented template

Wim M. Ruyten

doi:10.1117/1.1447228

1 March 2002 Subpixel localization of synthetic references in digital images by use of an augmented template

Wim M. Ruyten

Optical Engineering, Vol. 41, Issue 3, (March 2002). https://doi.org/10.1117/1.1447228

A new method is presented for the localization of synthetic references (SRs) in digital images based on normalized correlation. An augmented search template is used, which consists not only of occupied pixel fractions of the desired SR, but also of derivatives of these fractions with respects to shifts along the image axes. The resulting correlation values are higher than those based on standard correlation, especially for small SRs and unfavorable subpixel displacements between the template and the scene. The augmented template can also be used to determine the location of the SR to subpixel accuracy. The precision of this determination is affected less by systematic and random error than is the case for centroiding or sampled correlation interpolation, and can be estimated explicitly from the calculated correlation value. Numerical examples are given.

©(2002) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Wim M. Ruyten "Subpixel localization of synthetic references in digital images by use of an augmented template," Optical Engineering 41(3), (1 March 2002). https://doi.org/10.1117/1.1447228

Published: 1 March 2002

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