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Vol. 207, Issue 12, December 2016, pp. 65-72

 

Bullet

 

Characterization and Compensation of the Fixed Pattern Noise in the Output of a CCD Camera
 

* Andreas W. WINKLER and Bernhard G. ZAGAR

Institute for Measurement Technology, Johannes Kepler University Linz, Altenbergerstra?e 69, 4040 Linz, Austria
Tel.: +43 732 2468 5929, fax: + 43 732 2468 5933

E-mail: andreas.winkler@jku.at

 

Received: 5 November 2016 /Accepted: 5 December 2016 /Published: 30 December 2016

Digital Sensors and Sensor Sysstems

 

Abstract: A monochrome CCD camera is used in a reflectometer in order to measure the luminance of light reflected by a specimen. This application requires a compensation of the non-uniformities introduced by the optical system, also known as fixed pattern noise. We provide an image formation model and characterize the bias and the dark signal of the CCD sensor and we use a self-built integrating sphere with an inner diameter of 500 mm as a uniform light source in order to characterize the photo sensitivity of the whole optical system. Finally, a new effective approach to compensate the fixed pattern noise pixel by pixel and in dependence of the exposure time is proposed.

 

Keywords: Camera calibration, Flat-field correction, Fixed pattern noise, Dark signal, Photo response, Integrating Sphere.

 

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