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The cover image, by Eric Kirchner et al., is based on the Research Article Digitally reconstructing van Gogh's Field with Irises near Arles part 2: Pigment concentration maps, DOI 10.1002/col.22164.
Colors in many paintings of great art historical value have changed over time, due to the combined effects of natural ageing, accumulated surface grime, and materials added during later conservation treatments. The physical restoration of the colors in such paintings is not possible. This article describes one part of work done to digitally restore the colors of Van Gogh's painting Field with Irises near Arles...
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