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Volume: 3 | Article ID: art00094
Improvement of Multispectral Image Capture by Compensating for Stray Light
  DOI :  10.2352/CGIV.2006.3.1.art00094  Published OnlineJanuary 2006

This paper focusses on the improvement of multispectral image capture by compensating for stray light, which is generated in the optical path of a multispectral camera. The generation of stray light is an unwanted optical effect. It typically harms the quality of the captured image by raising the captured signals. In order to quantify the significance of this effect, a series of measurements with a multispectral camera has been carried out. The results will be given. Based on the measurements, a model for describing the effect has been developed. Stray light can quite exactly be approximated by a superposition of brightness which varies over the image as a function of the position and the image data itself. A test procedure consisting of a set of multispectral measurements has been defined. The measurements are used to derive the model parameters. Based on the model, a corrective algorithm has been developed, which eliminates the effects of stray light in a multispectral capturing device. The algorithm has been verified and results are pointed out. The improvement of multispectral image capture with the algorithm being applied is shown by figures of ΔE00 and spectral distributions of colors captured from the Color Checker.

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Stephan Helling, "Improvement of Multispectral Image Capture by Compensating for Stray Lightin Proc. IS&T CGIV 2006 3rd European Conf. on Colour in Graphics, Imaging, and Vision,  2006,  pp 458 - 462,

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