Created
November 7, 2015 21:18
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def rgb2hsv(r, g, b): | |
v = max(r,g,b) | |
l = min(r,g,b) | |
sxf = (1.0 / 6) | |
trd = (1.0 / 3) | |
# actual start | |
s = l / v; | |
# actual distance | |
d = v - l | |
r = (r - l) / d | |
g = (g - l) / d | |
b = (b - l) / d | |
h = 0 | |
if (r == 1): | |
if (b > 0): h += sxf * (1 - b) | |
if (g > 0): h += sxf * (1 + g) | |
elif (g == 1): | |
h += trd | |
if (r > 0): h += sxf * (1 - r) | |
if (b > 0): h += sxf * (1 + b) | |
elif (b == 1): | |
h += 2 * trd | |
if (g > 0): h += sxf * (1 - g) | |
if (r > 0): h += sxf * (1 + r) | |
h -= sxf | |
if (h < 0): h += 1 | |
return (h, s, v) | |
def hsv2rgb(h, s, v): | |
r = 0 | |
g = 0 | |
b = 0 | |
sxf = (1.0 / 6) | |
trd = (1.0 / 3) | |
h += sxf | |
if (h > 1): h -= 1.0 | |
if (h < trd): | |
r = 1.0 | |
if (h < sxf): | |
b = 1.0 - (h / sxf) | |
else: | |
g = ((h - sxf) / sxf) | |
elif (h < 2 * trd): | |
g = 1.0 | |
h -= 1 * trd | |
if (h < sxf): | |
r = 1.0 - (h / sxf) | |
else: | |
b = ((h - sxf) / sxf) | |
else: | |
b = 1.0 | |
h -= 2 * trd | |
if (h < sxf): | |
g = 1.0 - (h / sxf) | |
else: | |
r = ((h - sxf) / sxf) | |
c = (s * v) | |
r = c + (r * (v - c)) | |
g = c + (g * (v - c)) | |
b = c + (b * (v - c)) | |
return (r,g,b) | |
print (hsv2rgb(1.0/12, 0.5, 0.5)) |
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