21 lines
478 B
Python
Executable File
21 lines
478 B
Python
Executable File
#
|
|
# 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)
|