IET - Printed color: from atoms to conscious experiences

28th August 2021 6:00 pm

The resulting signals are processed for efficiency and evolutionarily tuned for maximizng an individual’s survival, based on the interplay between sensory inputs and memory/expectations that ultimately result in a person’s experience of color. During the early stages of the human visual pathway, an additive process combines the signals from the eyes’ three different light-sensitive cell types, which in turn allows for colors to be formed by combining three materials, each of which controls responses of one cell type. This is the basis of all color reproduction. In the case of printing, it is coupled with a subtractive process where materials such as inks or toners selectively subtract power from a light source’s output and a variety of materials like dyes or pigments can be used to this end. Finally, the understanding of human vision and the formation of materials that allow for its responses to be modulated set the context in which color and imaging algorithms operate to achieve a faithful reproduction of colors in print. This webinar will therefore provide a high level overview of some key features of human color vision, the mechanisms of print color formation and a sketch of print color control, with the aim of presenting a conceptual understanding of the boundary conditions and challenges of color printing.

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