2007colorlecture1 - 1 Color theory Color Perception: a...

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Unformatted text preview: 1 Color theory Color Perception: a judgement of the light reFected from a surface or emanating from a source. Spectral albedoes for several different Fowers, with colour names attached. Notice that different colours typically have different spectral albedo, but that different spectral albedoes may result in the same perceived colour (compare the two whites). Spectral albedoes are typically quite smooth functions. Measurements by E.Koivisto. RGB colour Space The colours that can be displayed on a typical computer monitor (phosphor limitations keep the space quite small) Color names Relatively few basic color names black, white, red, green, blue, brown, yellow, pink, purple gray Only a few refer directly to a color without reference. (e.g., lemon yellow, sky blue, ivory) And are not blends e.g., blue green 2 Orange: no word until the fruit until 11th century - and not until the late 17th century to free itself from its association with the fruit Still we do not use the term when it might be appropriate Red hair - Fre red - should be orange Gold Fsh - most orange Scholars studying the Illiad, noticed few color references 208 occasions - 148 white black, remaining 60 mainly red - some browns Gladstone - later Prime Minister,...
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2007colorlecture1 - 1 Color theory Color Perception: a...

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