def rgb_to_cmyk(rgb):
"""
Returns: color rgb in space CMYK, with the most black possible.
Formulae from en.wikipedia.org/wiki/CMYK_color_model.
Parameter rgb: the color to convert to a CMYK object
Precondition: rgb is an RGB object
"""
# The RGB numbers are in the range 0..255.
# Change the RGB numbers to the range 0..1 by dividing them by 255.0.
R = (rgb.red/255.0)
G = (rgb.green/255.0)
B = (rgb.blue/255.0)
Cyan = 1 - R
Magenta = 1 - G
Yellow = 1 - B
if Cyan == 1 and Magenta == 1 and Yellow == 1:
return introcs.CMYK(0.0,0.0,0.0,100.0)
else:
K = min(Cyan,Magenta,Yellow)
C = ((Cyan-K)/(1-K))*100.0
M = ((Magenta-K)/(1-K))*100.0
Y = ((Yellow-K)/(1-K))*100.0
return introcs.CMYK(C,M,Y,K*100.0)
def test_str5_color():
"""
Test the str5 functions for cmyk and hsv.
"""
print('Testing str5_cmyk and str5_hsv')
# Tests for str5_cmyk
# We need to make sure the coordinates round properly
text = a3.str5_cmyk(introcs.CMYK(98.448, 25.362, 72.8, 1.0))
introcs.assert_equals('(98.45, 25.36, 72.80, 1.000)',text)
#another test
text = a3.str5_cmyk(introcs.CMYK(0.0, 1.5273, 100.0, 57.846))
introcs.assert_equals('(0.000, 1.527, 100.0, 57.85)',text)
# Tests for str5_hsv (add two)
text = a3.str5_hsv(introcs.HSV(98.448, 0.123456789, 0.0))
introcs.assert_equals('(98.45, 0.123, 0.000)',text)
text = a3.str5_hsv(introcs.HSV(0.0,0.313725490196,1.0))
introcs.assert_equals('(0.000, 0.314, 1.000)',text)
#test max value for H
text = a3.str5_hsv(introcs.HSV(359.99,1.0,1.0))
introcs.assert_equals('(360.0, 1.000, 1.000)',text)
#test min values
text = a3.str5_hsv(introcs.HSV(0.0,0.0,0.0))
introcs.assert_equals('(0.000, 0.000, 0.000)',text)
print('Tests for str5_cmyk and str5_hsv passed')
def rgb_to_cmyk(rgb):
"""
Returns a CMYK object equivalent to rgb, with the most black possible.
Formulae from https://www.rapidtables.com/convert/color/rgb-to-cmyk.html
Parameter rgb: the color to convert to a CMYK object
Precondition: rgb is an RGB object
"""
assert (type(rgb) == introcs.RGB), rgb + ' is not a RGB object'
# The RGB numbers are in the range 0..255.
# Change them to the range 0..1 by dividing them by 255.0.
red = rgb.red / 255.0
green = rgb.green / 255.0
blue = rgb.blue / 255.0
black = 1 - max(red, green, blue)
if (black == 1):
cyan = 0.0
magenta = 0.0
yellow = 0.0
else:
cyan = (1 - red - black) / (1 - black) * 100.0
magenta = (1 - green - black) / (1 - black) * 100.0
yellow = (1 - blue - black) / (1 - black) * 100.0
black *= 100.0
return introcs.CMYK(cyan, magenta, yellow, black)
def test_str5_color():
"""
Test the str5 functions for cmyk and hsv.
"""
introcs.assert_equals(
'(98.45, 25.36, 72.80, 1.000)',
a2.str5_cmyk(introcs.CMYK(98.448, 25.362, 72.8, 1.0)))
introcs.assert_equals(
'(76.86, 0.000, 9.429, 100.0)',
a2.str5_cmyk(introcs.CMYK(76.858, 0.000, 9.42885, 100.0)))
# Tests for str5_hsv (add two)
introcs.assert_equals('(0.000, 1.000, 0.500)',
a2.str5_hsv(introcs.HSV(0.0, 1.0, 0.5)))
introcs.assert_equals('(0.000, 0.314, 1.000)',
a2.str5_hsv(introcs.HSV(0.0, 0.313725490196, 1.0)))
introcs.assert_equals('(12.00, 0.468, 0.325)',
a2.str5_hsv(introcs.HSV(12, 0.46792, 0.32456)))
introcs.assert_equals(
'(225.3, 0.151, 0.786)',
a2.str5_hsv(introcs.HSV(225.298, 0.1512256, 0.78610)))
def test_cmyk_to_rgb():
"""
Test translation function cmyk_to_rgb
"""
cmyk = introcs.CMYK(0.000, 100.0, 100.0, 0.000)
rgb = a2.cmyk_to_rgb(cmyk)
introcs.assert_equals('0.000', a2.str5(rgb.blue))
introcs.assert_equals('255.0', a2.str5(rgb.red))
introcs.assert_equals('0.000', a2.str5(rgb.green))
cmyk = introcs.CMYK(88.44, 76.99, 5.528, 21.96)
rgb = a2.cmyk_to_rgb(cmyk)
introcs.assert_equals('188.0', a2.str5(rgb.blue))
introcs.assert_equals('46.00', a2.str5(rgb.green))
introcs.assert_equals('23.00', a2.str5(rgb.red))
cmyk = introcs.CMYK(46.98, 55.10, 100.0, 2.122)
rgb = a2.cmyk_to_rgb(cmyk)
introcs.assert_equals('0.000', a2.str5(rgb.blue))
introcs.assert_equals('112.0', a2.str5(rgb.green))
introcs.assert_equals('132.0', a2.str5(rgb.red))
def on_cmyk_press(self,c,m,y,k):
"""
Callback to cmyk button
"""
self.cmyk = introcs.CMYK(c, m, y, k)
temp = a2.cmyk_to_rgb(self.cmyk)
assert (temp == None or type(temp) == introcs.RGB), \
'cmyk_to_rgb does not return a RGB object'
self.rgb = self.rgb if temp is None else temp
self.hsv = a2.rgb_to_hsv(self.rgb)
assert (self.hsv == None or type(self.hsv) == introcs.HSV), \
'rgb_to_hsv does not return a HSV object'
self.update()
def test_cmyk_to_rgb():
"""
Test translation function cmyk_to_rgb
"""
print('Testing cmyk_to_rgb')
# ADD TESTS TO ME
#all zero
cmyk = introcs.CMYK(0.0, 0.0, 0.0, 0.0)
rgb = a3.cmyk_to_rgb(cmyk)
introcs.assert_equals(255, round(rgb.red,3))
introcs.assert_equals(255,round(rgb.green,3))
introcs.assert_equals(255,round(rgb.blue,3))
# only black is max
cmyk = introcs.CMYK(0.0, 0.0, 0.0, 100.0)
rgb = a3.cmyk_to_rgb(cmyk)
introcs.assert_equals(0, round(rgb.red,3))
introcs.assert_equals(0,round(rgb.green,3))
introcs.assert_equals(0,round(rgb.blue,3))
# when all values are max
cmyk = introcs.CMYK(100.0, 100.0, 100.0, 100.0)
rgb = a3.cmyk_to_rgb(cmyk)
introcs.assert_equals(0, round(rgb.red,3))
introcs.assert_equals(0,round(rgb.green,3))
introcs.assert_equals(0,round(rgb.blue,3))
# test M is greatest
cmyk = introcs.CMYK(0.0, 80.184, 24.424, 14.902)
rgb = a3.cmyk_to_rgb(cmyk)
introcs.assert_equals(217, round(rgb.red,3))
introcs.assert_equals(43,round(rgb.green,3))
introcs.assert_equals(164,round(rgb.blue,3))
#test C is greatest
cmyk = introcs.CMYK(89.0, 11.0, 23.0, 50.0)
rgb = a3.cmyk_to_rgb(cmyk)
introcs.assert_equals(14, round(rgb.red,3))
introcs.assert_equals(113,round(rgb.green,3))
introcs.assert_equals(98,round(rgb.blue,3))
print('Tests for cmyk_to_rgb passed')
def on_cmyk_slide(self,c,m,y,k):
"""
Callback to cmyk sliders
"""
if not self.active:
return
cyan = c / 100.0
magenta = m / 100.0
yellow = y / 100.0
black = k / 100.0
self.cmyk = introcs.CMYK(cyan, magenta, yellow, black)
temp = a2.cmyk_to_rgb(self.cmyk)
assert (temp == None or type(temp) == introcs.RGB),\
'cmyk_to_rgb does not return a RGB object'
self.rgb = self.rgb if temp is None else temp
self.hsv = a2.rgb_to_hsv(self.rgb)
assert (self.hsv == None or type(self.hsv) == introcs.HSV), \
'rgb_to_hsv does not return a HSV object'
self.update()
def test_str5_color():
"""
Test the str5 functions for cmyk and hsv.
"""
introcs.assert_equals('(98.45, 25.36, 72.80, 1.000)',
a2.str5_cmyk(introcs.CMYK(98.448, 25.362, 72.8, 1.0)))