def test_cmyk_to_rgb():
"""
Test translation function cmyk_to_rgb
"""
cmyk = cornell.CMYK(0.000, 0.000, 0.000, 0.000);
rgb = a3.cmyk_to_rgb(cmyk);
cornell.assert_equals(255, (rgb.red))
cornell.assert_equals(255, (rgb.green))
cornell.assert_equals(255, (rgb.blue))
cmyk = cornell.CMYK(100.0, 100.0, 100.0, 0.000);
rgb = a3.cmyk_to_rgb(cmyk);
cornell.assert_equals(0, (rgb.red))
cornell.assert_equals(0, (rgb.green))
cornell.assert_equals(0, (rgb.blue))
cmyk = cornell.CMYK(75.60, 99.99, 0.123, 2.000);
rgb = a3.cmyk_to_rgb(cmyk);
cornell.assert_equals(61, (rgb.red))
cornell.assert_equals(0, (rgb.green))
cornell.assert_equals(250, (rgb.blue))
cmyk = cornell.CMYK(0.000, 0.000, 0.000, 100.0);
rgb = a3.cmyk_to_rgb(cmyk);
cornell.assert_equals(0, (rgb.red))
cornell.assert_equals(0, (rgb.green))
cornell.assert_equals(0, (rgb.blue))
def test_str5_color():
"""
Test the str5 functions for cmyk and hsv.
"""
cornell.assert_equals('(98.45, 25.36, 72.80, 1.000)',
a3.str5_cmyk(cornell.CMYK(98.448, 25.362, 72.8, 1.0)))
cornell.assert_equals('(1.000, 0.000, 100.0, 100.0)',
a3.str5_cmyk(cornell.CMYK(1, 0.0, 99.999999, 100)))
cornell.assert_equals('(0.000, 0.000, 0.000)',
a3.str5_hsv(cornell.HSV(0, 0.0, 0)))
cornell.assert_equals('(360.0, 1.000, 1.000)',
a3.str5_hsv(cornell.HSV(359.999, 1.0, 1)))
cornell.assert_equals('(279.5, 1.000, 0.735)',
a3.str5_hsv(cornell.HSV(279.547, 1, 0.7346983)))
def test_str5_color():
"""
Test the str5 functions for cmyk and hsv.
"""
cornell.assert_equals(
'(98.45, 25.36, 72.80, 1.000)',
a3.str5_cmyk(cornell.CMYK(98.448, 25.362, 72.8, 1.0)))
def test_cmyk_to_rgb():
"""
Test translation function cmyk_to_rgb
"""
#Test 1
cmyk = cornell.CMYK(0.000, 0.000, 0.000, 0.000)
rgb = a3.cmyk_to_rgb(cmyk)
cornell.assert_equals(255, rgb.red)
cornell.assert_equals(255, rgb.green)
cornell.assert_equals(255, rgb.blue)
#Test 2
cmyk = cornell.CMYK(29.00, 40.00, 32.00, 60.00)
rgb = a3.cmyk_to_rgb(cmyk)
cornell.assert_equals(72, rgb.red)
cornell.assert_equals(61, rgb.green)
cornell.assert_equals(69, rgb.blue)
def test_str5_color():
"""
Test the str5 functions for cmyk and hsv.
"""
cornell.assert_equals(
'(98.45, 25.36, 72.80, 1.000)',
a3.str5_cmyk(cornell.CMYK(98.448, 25.362, 72.8, 1.0)))
#cornell.assert_equals('(98.45, 25.36, 72.80, 1.000)',
# a3.str5_cmyk(cornell.CMYK(98.448, 25.362, 72.8, 1.0)))
cornell.assert_equals('(0.000, 0.314, 1.000)',
a3.str5_hsv(cornell.HSV(0.0, 0.313725490196, 1.0)))
cornell.assert_equals('(0.500, 0.666, 1.000)',
a3.str5_hsv(cornell.HSV(0.5, 0.666352839474, 1)))
def on_cmyk_press(self, c, m, y, k):
"""
Callback to cmyk button
"""
self.cmyk = cornell.CMYK(c, m, y, k)
temp = a3.cmyk_to_rgb(self.cmyk)
assert (temp == None or type(temp) == cornell.RGB), \
'cmyk_to_rgb does not return a RGB object'
self.rgb = self.rgb if temp is None else temp
self.hsv = a3.rgb_to_hsv(self.rgb)
assert (self.hsv == None or type(self.hsv) == cornell.HSV), \
'rgb_to_hsv does not return a HSV object'
self.update()
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
"""
r_new = rgb.red/255.0
g_new = rgb.green/255.0
b_new = rgb.blue/255.0
c_new = 1 - r_new
m_new = 1 - g_new
y_new = 1 - b_new
if c_new == 1 and m_new == 1 and y_new == 1:
c_final = 0
m_final = 0
y_final = 0
k_final = 1
c_final_final = c_final *100.0
m_final_final = m_final *100.0
y_final_final = y_final *100.0
k_final_final = k_final *100.0
else:
k_final = min(c_new, m_new, y_new)
c_final = (c_new - k_final)/(1 - k_final)
m_final = (m_new - k_final)/(1 - k_final)
y_final = (y_new - k_final)/(1 - k_final)
c_final_final = c_final * 100.0
m_final_final = m_final * 100.0
y_final_final = y_final * 100.0
k_final_final = k_final * 100.0
return cornell.CMYK(c_final_final, m_final_final, y_final_final, \
k_final_final)
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 = cornell.CMYK(cyan, magenta, yellow, black)
temp = a3.cmyk_to_rgb(self.cmyk)
assert (temp == None or type(temp) == cornell.RGB),\
'cmyk_to_rgb does not return a RGB object'
self.rgb = self.rgb if temp is None else temp
self.hsv = a3.rgb_to_hsv(self.rgb)
assert (self.hsv == None or type(self.hsv) == cornell.HSV), \
'rgb_to_hsv does not return a HSV object'
self.update()
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.
#Initial Varibles
red = rgb.red
green = rgb.green
blue = rgb.blue
red_1 = red / 255.0
green_1 = green / 255.0
blue_1 = blue / 255.0
C_1 = 1 - red_1
M_1 = 1 - green_1
Y_1 = 1 - blue_1
K_1 = 0
#Determing K value
if (C_1 == 1 and M_1 == 1 and Y_1 == 1):
K_1 = 1
if (C_1 <= M_1 and C_1 <= Y_1):
K_1 = C_1
if (M_1 <= C_1 and M_1 <= Y_1):
K_1 = M_1
if (Y_1 <= M_1 and Y_1 <= C_1):
K_1 = Y_1
#Changing CMY values based on new K
if (K_1 == 1):
C_1 = 0
M_1 = 0
Y_1 = 0
if (K_1 != 1):
C_2 = (C_1 - K_1) / (1 - K_1)
M_2 = (M_1 - K_1) / (1 - K_1)
Y_2 = (Y_1 - K_1) / (1 - K_1)
#Converting CMYK values to proper range
if (K_1 == 1):
C_3 = C_1 * 100
M_3 = M_1 * 100
Y_3 = Y_1 * 100
K_3 = K_1 * 100
if (K_1 != 1):
C_3 = C_2 * 100
M_3 = M_2 * 100
Y_3 = Y_2 * 100
K_3 = K_1 * 100
#Return CMYK Object
return cornell.CMYK(C_3, M_3, Y_3, K_3)