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Reconstruction of spatially resolved color spectra from continuous line scan camera measurements

Reconstruction of spatially resolved color spectra from continuous line scan camera measurements

07/2015- 06/2018

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color remission example
Example of a color remission as a function of the wavelength of light

Spectral color measurement is a fundamental application in many industrial areas, and it also becomes of increasing importance in automated machine control and quality assessment. Standard procedures employ spot color measurement devices with which a measurement of a complete specimen can be accomplished only with huge efforts. In contrast, line scanning cameras offer the theoretical advantage of spatially resolved measurements, allowing for a measurement of the complete specimen. However, for the wide spread use of such devices the current lack of robust and validated mathematical and statistical procedures for the reconstruction of the color spectra from the line scan camera measurements has to be overcome. An important practical challenge is to account for environmental influences, such as, for instance, the lighting situation or the filters employed.

In this project knowledge and experience of PTB together with practical expertise of the company Chromasens will be employed to derive a suitable algorithm, which based on knowledge about the environmental influences provides a reliable estimate of the spatially resolved color spectra measured by Chromasens' line scan camera.