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Presentation Information     2007-09-03 (15:15)   •  The seminar room at Vi2

Speaker Gunilla Borgefors
Title Colour vision in the animal and digital kingdoms
Abstract Goldfish, geckos, and goldfinches all have much better colour discrimination than us mammals. And its the dinosaurs' fault! But we apes are a little bit better off than most other mammals. Unless we are colour blind of course - then we see like dogs, dugongs, and deer.

Our wetware makes remarkably good use of the blue, green and greenish yellow signals the cones in our retinas produces. They are converted to three channels before leaving the retina - but these are neither RGB nor HLS. Which makes our ubiquitous RGB screens really stupid - especially since our blue resolution is only a tenth of that in green and yellow.

But if you like cerulean blue - like so many 18th and 19th century artists did - you are out of luck if you use digital photography. An RGB screen cannot show this colour! But, in a few years even I may go digital - when the new human vision oriented four, five-, and six-colour screens will be available.

But anyway - the goldfish will not be impressed. And even less so the the colour vision champion of Tellus - the hexadecachromatic mantis shrimp.