Lightness and Brightness and Other Confusions
Lightness and Brightness and Other Confusions
Lightness and Brightness and Other Confusions
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– colour 8, 24–25, 30, 42, 49–50,<br />
55, 60, 61, 63, 90, 93, 97, 98, 103<br />
– colour variations 49<br />
– chroma 86, 89<br />
– identity colour 49<br />
– light 48<br />
perspective (linear) 37 fn, 38<br />
photometry 49, 59, 60, 62, 64, 65,<br />
67, 104<br />
photometric concepts <strong>and</strong> terms 59,<br />
60, 63, 65, 68, 70<br />
photon 53, 54, 74 fn, 75 fn<br />
photopic vision 36, 59 fn, 75 fn<br />
physical colour 8–10 passim, 63<br />
physicalism 95, 98<br />
Popper, Karl 21<br />
positivism 17<br />
Prall, David 30<br />
primary colour 49, 69, 77–84<br />
– additive 78, 82–84<br />
– imaginary 83, 84<br />
– psychological 81<br />
– subtractive 78–79<br />
primary lights 83, see also: additive<br />
primaries<br />
principal hue (in Munsell System)<br />
80<br />
psychological primaries see: primary<br />
colour<br />
psychophysics (of colour <strong>and</strong> light)<br />
9, 58, 60, 64, 69, 76, 82–83, 84,<br />
104<br />
psychophysical colour 9, 10<br />
R<br />
radiant energy (pattern of) 35, 38,<br />
73<br />
radiant flux 76<br />
RAL 57<br />
‘real colour’ 24 fn, 74, 92–100, 94 fn<br />
receptors (of eye) 9, 10, 38, 54, 58,<br />
63, 74 fn, 75 fn 78, 82,83 fn, 89<br />
recognition 18, 38, 39, 42, 100<br />
reflectance 10, 70, 73,74 fn, 75, 76<br />
– curve 62, see also: spectral<br />
distrbution curve<br />
– pattern 94<br />
refraction 54<br />
related colour 90, 91, 95<br />
retina 11, 23, 38, 39–40, 77<br />
retinal image 22, 35, 36, 37<br />
RGB 57, 61, 76, 82–83<br />
S<br />
Saltzman, Max 83–89 passim<br />
saturation (of colour) 68, 84–89,<br />
91, see also: vividness (of colour)<br />
scotopic vision 36, 75 fn, 83 fn<br />
secondary colour 49, 78, 82, see<br />
also: binary hue<br />
self-luminous (object) 51, 72, 74<br />
shade (of colour) 49, 77, 85, 93<br />
shadow (light <strong>and</strong>) 7, 8, 10, 14, 25,<br />
28, 34–38 passim, 48, 73–74,<br />
93–100 passim<br />
shadow series 89<br />
Simons, Daniel 40<br />
simultaneous contrast 7, 35, 75, 103<br />
spectral<br />
– energy emission 94<br />
– distribution (curve) 55, 56, 61, 98<br />
– (power) distribution 8, 9, 10, 14,<br />
18, 23, 53, 54, 62, 92<br />
– reflectance 95, 98<br />
spectrometer 53<br />
spectrophotometer 7, 59, 61, 94, 95<br />
spectroradiometer 53, 55<br />
st<strong>and</strong>ard illuminant 13, 60, 61,<br />
88 fn<br />
st<strong>and</strong>ardized colour sample 94<br />
stimulus (visual) 36–40, 60, 67<br />
stimulus locus 12<br />
substance colour 56, 57, 74<br />
subtractive primaries see: primary<br />
colour<br />
surface colour 12, 16, 51, 69, 91, 88<br />
spectrum (of light) 24, 53 fn, 54,<br />
59, 61, 78 fn, 83<br />
108
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