Multispectral color image capture using a liquid crystal tunable filter

Jon Yngve Hardeberg; Francis J. M. Schmitt; Hans Brettel

doi:10.1117/1.1503346

1 October 2002 Multispectral color image capture using a liquid crystal tunable filter

Jon Yngve Hardeberg, Francis J. M. Schmitt, Hans Brettel

Optical Engineering, Vol. 41, Issue 10, (October 2002). https://doi.org/10.1117/1.1503346

We describe the experimental setup of a multispectral color image acquisition system consisting of a professional monochrome CCD camera and a tunable filter in which the spectral transmittance can be controlled electronically. We perform a spectral characterization of the acquisition system taking into account the acquisition noise. To convert the camera output signals to device-independent color data, two main approaches are proposed and evaluated. One consists in applying regression methods to convert from the K camera outputs to a device-independent color space such as CIEXYZ or CIELAB. Another method is based on a spectral model of the acquisition system. By inverting the model using a principal eigenvector approach, we estimate the spectral reflectance of each pixel of the imaged surface.

©(2002) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Jon Yngve Hardeberg, Francis J. M. Schmitt, and Hans Brettel "Multispectral color image capture using a liquid crystal tunable filter," Optical Engineering 41(10), (1 October 2002). https://doi.org/10.1117/1.1503346

Published: 1 October 2002

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