Characterizing digital image acquisition devices

Authors

Stephen E. Reichenbach, University of Nebraska—LincolnFollow
Stephen K. Park, College of William and Mary
Ramkumar Narayanswamy, Science and Technology Corporation

Document Type

Article

Date of this Version

8-13-1990

Citation

1991 Society of Photo-Optical Instrumentation Engineers.

Comments

170 / OPTICAL ENGINEERING / February 1991 / Vol. 30 No. 2

Abstract

Despite the popularity of digital imaging devices (e.g., CCD array cameras) the problem of accurately characterizing the spatial frequency response of such systems has been largely neglected in the literature. This paper describes a simple method for accurately estimating the optical transfer function of digital image acquisition devices. The method is based on the traditional knife-edge technique but explicitly deals with fundamental sampled system considerations: insufficient and anisotropic sampling. Results for both simulated and real imaging systems demonstrate the accuracy of the method.