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Multispectral imaging: narrow or wide band filters?

Wang, Xingbo; Thomas, Jean-Baptiste; Hardeberg, Jon Yngve; Gouton, Pierre
Journal article, Peer reviewed
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XWang_JBThomas_JonYHardeberg_PGouton_2014.pdf (264.1Kb)
Permanent lenke
http://hdl.handle.net/11250/197985
Utgivelsesdato
2014
Metadata
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  • Institutt for informasjonssikkerhet og kommunikasjonsteknologi [1563]
Originalversjon
Wang, X., Thomas, J.-B., Hardeberg, J. Y. &Gouton, P. (2014) Multispectral imaging: narrow or wide band filters? In: Journal of the International Colour Association, 12 p. 44-51.  
Sammendrag
In every aspect, spectral characteristics of filters play an important role in an image acquisition

system. For a colorimetric system, traditionally, it is believed that narrow-band filters give rise to

higher accuracy of colour reproduction, whereas wide-band filters, such as complementary colour

filters, have the advantage of higher sensitivity. In the context of multispectral image capture, the

objective is very often to retrieve an estimation of the spectral reflectance of the captured objects. The

literature does not provide a satisfactory answer to which configuration yields the best results. It is

therefore of interest to verify which type of filters performs the best in estimating the reflectance

spectra for the purpose of multispectral image acquisition. A series of experiments were conducted on

a simulated imaging system, with six types of filters of varying bandwidths paired with three linear

reflectance estimation methods. The results show that filter bandwidth exerts direct influence on the

accuracy of reflectance estimation. Extremely narrowband filters did not perform well in the

experiment and the relation between bandwidth and reflectance estimation accuracy is not monotonic.

Also it is indicated that the optimal number of filters depends on the spectral similarity metrics

employed.
Beskrivelse
This is an Open Access article. This is the publisher’s PDF originally published in Journal of the International Colour Association: http://aic-colour-journal.org/index.php/JAIC/article/view/149
Utgiver
International Colour Association
Tidsskrift
Journal of the International Colour Association

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