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Communication Dans Un Congrès Année : 2023

Impact of a coating layer on the appearance of various halftone patterns

Résumé

Coating a printed surface with a smooth transparent layer can modify its color. This is due to light interreflections within the coating layer which produce a halo-shaped point spread function. The change of color is related to the coating thickness and the halftone screening used for printing. Thanks to an optical model able to predict the spectral reflectance of the coated print from the one of the non-coated print, we propose to study the impact of the halftone pattern (shape and profile) on the color change caused by the coating layer. It was found that line halftone patterns with a crenel profile induces the strongest changes of color. This is therefore the pattern that we use for an innovative application of this phenomenon: revealing a binary image by adding or removing a coating layer on the print that is originally uniform.
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Dates et versions

hal-04113015 , version 1 (01-06-2023)

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Citer

Fanny Dailliez, Mathieu Hebert, Lionel Simonot, Lionel Chagas, Thierry Fournel, et al.. Impact of a coating layer on the appearance of various halftone patterns. Electronic Imaging, Society for Imaging Science and Technology, Jan 2023, San Francisco, United States. pp.204-1-204-7, ⟨10.2352/EI.2023.35.15.COLOR-204⟩. ⟨hal-04113015⟩
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