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Select a file with spectral data:

 

 
 
 
 
 
 
OR
drop a file here
(these features are slow with numerous spectra)
a*b* diagram
Spectra processed: 4, wavelength range: 380–730 nm.
CSV file | report: https://pozhvanov.com/spectro?view_id=7568-8755-5485&legend=on
#sRGBRGBHSB(V)LXYZL*a*b*λminλmaxIntegral
Юля_загорелая#a37c68163
126
124
109
104
89
20
32
36
29
64
49
52
42
25.723.412.355.513.617.1417717944.6 K
Юля_незагорелая#b4a091180
153
160
144
145
130
26
37
19
15
71
60
64
55
37.537.124.467.35.910.54237001369.82 K
Гриша_загорелый#805f4e128
93
95
80
78
64
20
33
39
31
50
36
40
31
14.913.56.843.51215.4417730550.63 K
Гриша_незагорелый#b39986179
149
153
138
134
119
25
38
25
20
70
58
61
53
35.434.420.965.37.713.64237031286.69 K
 

Use ArgyllCMS to acquire spectra:

#   reflectance spectrum
spotread -v -s -H "file_refl.sp"

#   transmission spectrum
spotread -v -s -H -t "file_trans.sp"

#   emission spectrum
spotread -v -s -H -e "file_emiss.sp"
#   flash emission spectrum
spotread -v -s -H -f "file_flash.sp"
#   ambient light spectrum
spotread -v -s -H -a "file_ambnt.sp"

Do not know how to start?
Try viewing ambient light spectrum or compare cloudy sky with flashlight, macro flash and two different lamps.
Found bugs, have suggestions, etc.? You know where to complain.
Application manual is coming later this year.