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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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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.
Original languageEnglish
Title of host publication29th Color and Imaging Conference - Color Science and Engineering Systems, Technologies, and Applications, CIC 2021 - Proceedings
Number of pages6
ISBN (Electronic)9780892083572
Publication statusPublished - 1 Nov 2021

Publication series

NameFinal Program and Proceedings - IS and T/SID Color Imaging Conference
ISSN (Print)2166-9635
ISSN (Electronic)2169-2629

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