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Initial revision

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Guido van Rossum 1991-11-22 14:06:10 +00:00
parent a63f19798d
commit 01ebbb80ab
1 changed files with 20 additions and 0 deletions
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Demo/sgi/video/colorsys.py Executable file
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#
# Module color - do color conversions
#
def rgb_to_yiq(r,g,b):
y = 0.30*r + 0.59*g + 0.11*b
i = 0.60*r - 0.28*g - 0.32*b
q = 0.21*r - 0.52*g + 0.31*b
return (y,i,q)
def yiq_to_rgb(y,i,q):
r = y + 0.948262*i + 0.624013*q
g = y - 0.276066*i - 0.639810*q
b = y - 1.105450*i + 1.729860*q
if r < 0.0: r = 0.0
if g < 0.0: g = 0.0
if b < 0.0: b = 0.0
if r > 1.0: r = 1.0
if g > 1.0: g = 1.0
if b > 1.0: b = 1.0
return (r,g,b)