Created
December 6, 2014 23:38
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wav2RGB
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# http://codingmess.blogspot.com/2009/05/conversion-of-wavelength-in-nanometers.html | |
def wav2RGB(wavelength): | |
w = int(wavelength) | |
# colour | |
if w >= 380 and w < 440: | |
R = -(w - 440.) / (440. - 350.) | |
G = 0.0 | |
B = 1.0 | |
elif w >= 440 and w < 490: | |
R = 0.0 | |
G = (w - 440.) / (490. - 440.) | |
B = 1.0 | |
elif w >= 490 and w < 510: | |
R = 0.0 | |
G = 1.0 | |
B = -(w - 510.) / (510. - 490.) | |
elif w >= 510 and w < 580: | |
R = (w - 510.) / (580. - 510.) | |
G = 1.0 | |
B = 0.0 | |
elif w >= 580 and w < 645: | |
R = 1.0 | |
G = -(w - 645.) / (645. - 580.) | |
B = 0.0 | |
elif w >= 645 and w <= 780: | |
R = 1.0 | |
G = 0.0 | |
B = 0.0 | |
else: | |
R = 0.0 | |
G = 0.0 | |
B = 0.0 | |
# intensity correction | |
if w >= 380 and w < 420: | |
SSS = 0.3 + 0.7*(w - 350) / (420 - 350) | |
elif w >= 420 and w <= 700: | |
SSS = 1.0 | |
elif w > 700 and w <= 780: | |
SSS = 0.3 + 0.7*(780 - w) / (780 - 700) | |
else: | |
SSS = 0.0 | |
SSS *= 255 | |
return [int(SSS*R), int(SSS*G), int(SSS*B)] |
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