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This Excel spreadsheet is used to synthesize
a full reflectance spectrum from an input of only three colorimetric values,
for example CIE L* a* b*, or CIE L* C* h° or CIE X Y Z values.
It contains a macro, the macro is safe and the utility will only run with
the macro switched on. |
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This Excel spreadsheet is used to determine CIEDE2000 colour
difference values from CIE L*a*b* values. It features a method of splitting
the total difference into hue, lightness and chroma components.
Also calculated are the CIE L* a* b*, CIE L* C* H*, CMC colour difference
and CIE 94 colour difference. |
| XYZtoDom |
| V01(30Jan04) 117K |
| ©Colour4Free: xls |
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This Excel spreadsheet is used to determine the dominant
wavelength, and excitation purity of an XYZ colour stimulus. The complementary
wavelength is also determined.
Values can be determined for the CIE 2 degree and for the 10 degree observer
functions. |
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Convert between: X Y Z and Y x y
L* a* b* and L* C* h°
L* u' v', L* u* v* and L* C* h°
CIE Whiteness and tint values are calculated also.
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| LabToRGB |
| V01(08Feb04) 71K |
| ©Colour4Free: xls |
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This Excel spreadsheet is used to convert values of L* a*
b* (or L* C* h) to values of RGB for a video display screen. The conversion
is based on the sRGB definitions of the the light emitted from the display
screen. |
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