Designing a Color Filter with High Overall Transmittance for Improving the Color Accuracy of Digital Cameras

Zhu, Yuteng and Finlayson, Graham D. (2021) Designing a Color Filter with High Overall Transmittance for Improving the Color Accuracy of Digital Cameras. In: 29th Color and Imaging Conference - Color Science and Engineering Systems, Technologies, and Applications, CIC 2021 - Proceedings. Final Program and Proceedings - IS and T/SID Color Imaging Conference. IS&T, pp. 1-6. ISBN 9780892083572

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Abstract

Previously improved color accuracy of a given digital camera was achieved by carefully designing the spectral transmittance of a color filter to be placed in front of the camera. Specifically, the filter is designed in a way that the spectral sensitivities of the camera after filtering are approximately linearly related to the color matching functions (or tristimulus values) of the human visual system. To avoid filters that absorbed too much light, the optimization could incorporate a minimum per wavelength transmittance constraint. In this paper, we change the optimization so that the overall filter transmittance is bounded, i.e. we solve for the filter that (for a uniform white light) transmits (say) 50% of the light. Experiments demonstrate that these filters continue to solve the color correction problem (they make cameras much more colorimetric). Significantly, the optimal filters by restraining the average transmittance can deliver a further 10% improvement in terms of color accuracy compared to the prior art of bounding the low transmittance.

Item Type: Book Section
Uncontrolled Keywords: computer vision and pattern recognition,electronic, optical and magnetic materials,atomic and molecular physics, and optics ,/dk/atira/pure/subjectarea/asjc/1700/1707
Faculty \ School: Faculty of Science > School of Computing Sciences
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Depositing User: LivePure Connector
Date Deposited: 04 Dec 2021 01:46
Last Modified: 04 Jan 2022 11:31
URI: https://ueaeprints.uea.ac.uk/id/eprint/82564
DOI: 10.2352/issn.2169-2629.2021.29.1

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