COLORISTIC SOLUTION FOR COMPLEX MOSAIC IMAGES LASER-ENGRAVED ON WOOD
Keywords:
wood, laser engraving, tone gradient, absorbed power, coloristic seriesAbstract
The results of developing a coloristic series with a greater number of visually distinct color shades for laser engraving complex mosaic images on beech and aspen wood are presented in the paper. Two independent methods used to study the engraved wood shade yielded consistent results: instrumental, based on determining color coordinates in the Lab system, and visual, based on tone expert evaluation. The reduced discretization step of the tone gradient ΔEs to two Е units combined with simultaneous tone gradient spread, allows increasing the number of shades and extending the coloristic series of engraved beech and aspen wood. The successive power elevation caused by the computer template raster (resolution) density growth results in the formation of three distinctive regions on the tone gradient: the light-toned region, the darkened region, and the lightened region. The integrated coloristic index Е decreases in the first two regions but increases in the third one due to the light reflection by carbonized wood cells.
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