Effect of point-spread functions on the edge orientation precision of first-derivative operators

Raymond G. White; Robert A. Schowengerdt

doi:10.1117/12.59980

1 October 1992 Effect of point-spread functions on the edge orientation precision of first-derivative operators

Raymond G. White, Robert A. Schowengerdt

Author Affiliations +

Optical Engineering, Vol. 31, Issue 10, (October 1992). https://doi.org/10.1117/12.59980

Abstract

We examine how different imaging sensor point-spread functions (PSFs) affect the precision to which small-template first-derivative operators can measure step-edge orientation. Three PSF models are tested under different numbers of image quantization levels. For each model, the precisions produced by several first-derivative operators are computed using different error measures. Optimal estimates derived using the theory of locales are also provided as a basis for comparison. It is shown that the size of the PSF significantly affects the precision to which orientation can be found. Precision is highest when the PSF has a spread of 1.0 to 1.4 pixels and is dependent on the PSF shape. A method to produce optimal first-derivative templates for specific PSFs is also described.

Citation Download Citation

Raymond G. White and Robert A. Schowengerdt "Effect of point-spread functions on the edge orientation precision of first-derivative operators," Optical Engineering 31(10), (1 October 1992). https://doi.org/10.1117/12.59980

Published: 1 October 1992

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