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[/Title (PostScript pictures: farbe.li.tu-berlin.de/CGS0/CGS0.HTM)
 /Author (compare K. Richter "Computergrafik ...": ISBN 3-8007-1775-1)
 /Subject (goto: http://farbe.li.tu-berlin.de or http://color.li.tu-berlin.de)
 /Keywords (image reproduction, colour devices)
 /Creator (klaus.richter@mac.com)
 /CreationDate (D:2021040112000)
 /ModDate (D:20210401112000)
/DOCINFO pdfmark02
[ /View [ /Fit ]
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(CIELAB lightness) showen
TBIL ( L*, ) show
TBL
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(CIE tristimulus value discrimination) showen

050 3600 moveto
TBIL (dY) show
TBL
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TBIL ( (Y/dY)) show

/x0 100 def
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x0 y0 moveto
TBL (CIELAB lightness for all colours) showen
(CIELAB\255Helligkeit f\374r alle Farben) showde
TBIL ( L*) show (w) ibLs
TBL (=100:) show

%L*= 116(Y/Yn)**(1/3)-16
x1 y0 0.9 ydel mul sub moveto
TBIL (L*) show
TBL ( = 116 \050) show
TBIL (Y/Y) show
(n) ibLs
TBL (\051) show
(1/3) ebLs
TBL ( - 16) show

3500 y0 0.9 ydel mul sub moveto
TBL (\050) show
TBIL ( Y) show
(n) ibLs
TBL (=100, ) show
TBIL ( Y ) show
TBL (> 1 \051) show

x0 y0 2 ydel mul sub moveto
(For the grey discrimination we get:) showen
(F\374r die Grauunterscheidung erh\344lt man:) showde

%dL*/dY=(116/Yn) (1/3) (Y/Yn)**(2/3)
x1 y0 2.9 ydel mul sub moveto
TBIL (dL*/dY) show
TBL ( = \050116/) show
TBIL (Y) show (n) ibLs
TBL (\051 (1/3) \050) show
TBIL (Y/Y) show
(n) ibLs
TBL (\051) show
(-2/3) ebLs

x0 y0 4 ydel mul sub moveto
TBL (and for) showen
(und f\374r) showde
TBIL ( dL*) show
TBL (=1 (about 3 thresholds) we can write:) showen
(=1 (ungef\344hr 3 Schwellen) erhalten wir:) showde

x1 y0 4.9 ydel mul sub moveto
TBIL (dY) show
TBL ( = \0503) show
TBIL (\050Y) show (n) ibLs (1/3) ebLs
TBL(\051/116\051 \050) show 
TBIL (Y) show
TBL (\051) show
(2/3) ebLs

x0 y0 5.9 ydel mul sub moveto
TBL (or) showen
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x1 y0 5.9 ydel mul sub moveto
TBL (log) show
TBIL ((dY)) show
TBL ( = log\0503\050) show
TBIL (Y) show (n) ibLs (1/3) ebLs
TBL(\051/116\051) show
TBL ( + (2/3) log\050) show
TBIL (Y) show
TBL (\051) show

x0 y0 7 ydel mul sub moveto
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x0 y0 8 ydel mul sub moveto
TBL (for the CIE contrast sensitivity, and for) showen
(f\374r die CIE\255Kontrastempfindlichkeit und f\374r) showde
TBIL ( dL*) show
TBL ( = 1 it is valid:) showen
( = 1 gilt:) showde

x1 y0 8.9 ydel mul sub moveto
TBIL (Y/dY) show
TBL ( = (1/3) \050116/\050) show
TBIL (Y) show (n) ibLs (1/3) ebLs 
TBL (\051\051 ) show
TBIL (Y) show (1/3) ebLs

x0 y0 9.9 ydel mul sub moveto
TBL (or) showen
(oder) showde

x1 y0 9.9 ydel mul sub moveto
TBL (log) show
TBIL ((Y/dY)) show
TBL ( = log\050 (1/3) \050116/\050) show
TBIL (Y) show (n) ibLs (1/3) ebLs
TBL (\051\051 ) show
TBL ( + (1/3) log\050) show
TBIL (Y) show
TBL (\051) show

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%%Trailer