Special Issue: Modern Sensing Technologies

Vol. 90, April 2008, pp. 185-194

Measurement of Digital Camera Image Noise for Imaging Applications

¹Kenji IRIE, ²Alan E. McKINNON, ²Keith UNSWORTH, ¹Ian M. WOODHEAD

¹Lincoln Ventures Ltd, P.O. Box 133, Lincoln, Christchurch 7640, New Zealand

Tel.: ++64-3-325-3712, fax ++64-3-325-3712,

² Applied Computing Group, Lincoln University, Canterbury, New Zealand

E-mail: iriek@lvl.co.nz, woodhead@lvl.co.nz, mckinnon@lincoln.ac.nz, unsworth@lincoln.ac.nz

 Received: 15 October 2007   /Accepted: 20 February 2008   /Published: 15 April 2008

Abstract: Noise within captured images from digital cameras is unavoidable and can confound or reduce the performance of an image-based application. It is present in the captured photons, generated in the sensor electronics, and an inherent part of the digital signal processing. A measure of image noise can allow an algorithm to fine tune its parameters to minimize the effects of noise, or could be used in a filter to remove noise prior to image analysis. This paper presents an overview of image noise and describes a method for measuring noise quantity for use in image-based applications.

Keywords: Image analysis, Noise measurement, CCD image sensor, CMOS image sensor

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