def xyzFromRGB(red, green=None, blue=None): """ RGB转成xyz """ if isinstance(red, basestring): # assume a hex string is passed if red[0] == "#": colorString = red[1:] else: colorString = red red = int(colorString[0:2], 16) green = int(colorString[2:4], 16) blue = int(colorString[4:], 16) # We need to convert the RGB value to Yxy. redScale = float(red) / 255.0 greenScale = float(green) / 255.0 blueScale = float(blue) / 255.0 colormodels.init( phosphor_red=colormodels.xyz_color(0.64843, 0.33086), phosphor_green=colormodels.xyz_color(0.4091, 0.518), phosphor_blue=colormodels.xyz_color(0.167, 0.04)) xyz = colormodels.irgb_color(red, green, blue) xyz = colormodels.xyz_from_rgb(xyz) xyz = colormodels.xyz_normalize(xyz) return xyz
def test_rgb_irgb(verbose=1):
'''Test that conversions between rgb and irgb are invertible.'''
for i in xrange(0, 100):
ir = random.randrange(0, 256)
ig = random.randrange(0, 256)
ib = random.randrange(0, 256)
irgb0 = colormodels.irgb_color(ir, ig, ib)
rgb0 = colormodels.rgb_from_irgb(irgb0)
irgb1 = colormodels.irgb_from_rgb(rgb0)
rgb1 = colormodels.rgb_from_irgb(irgb1)
if (irgb0[0] != irgb1[0]) or (irgb0[1] != irgb1[1]) or (irgb0[2] !=
irgb1[2]):
msg = 'irgb0 %s and irgb1 %s do not match' % (str(irgb0),
str(irgb1))
raise ValueError(msg)
tolerance = 1.0e-14
err_rgb = rgb1 - rgb0
err_r = math.fabs(err_rgb[0])
err_g = math.fabs(err_rgb[1])
err_b = math.fabs(err_rgb[2])
if (err_r > tolerance) or (err_g > tolerance) or (err_b > tolerance):
msg = 'rgb0 %s and rgb1 %s differ by %g' % (
str(rgb0), str(rgb1), max(err_r, err_g, err_b))
raise ValueError(msg)
if verbose >= 1:
print('Passed test_rgb_irgb()')
def test_irgb_string(self, verbose=False):
''' Convert back and forth from irgb and irgb_string. '''
for i in range (100):
ir = random.randrange (0, 256)
ig = random.randrange (0, 256)
ib = random.randrange (0, 256)
irgb = colormodels.irgb_color (ir, ig, ib)
self.check_irgb_string(irgb, verbose)
def test_rgb_irgb(self, verbose=False):
''' Test that conversions between rgb and irgb are invertible. '''
for i in range (100):
ir = random.randrange (0, 256)
ig = random.randrange (0, 256)
ib = random.randrange (0, 256)
irgb0 = colormodels.irgb_color (ir, ig, ib)
self.check_rgb_irgb(irgb0, verbose)
def test_irgb_string(self, verbose=False):
''' Convert back and forth from irgb and irgb_string. '''
for i in range(100):
ir = random.randrange(0, 256)
ig = random.randrange(0, 256)
ib = random.randrange(0, 256)
irgb = colormodels.irgb_color(ir, ig, ib)
self.check_irgb_string(irgb, verbose)
def test_rgb_irgb(self, verbose=False):
''' Test that conversions between rgb and irgb are invertible. '''
for i in range(100):
ir = random.randrange(0, 256)
ig = random.randrange(0, 256)
ib = random.randrange(0, 256)
irgb0 = colormodels.irgb_color(ir, ig, ib)
self.check_rgb_irgb(irgb0, verbose)
def test_irgb_string (verbose=1):
'''Convert back and forth from irgb and irgb_string.'''
for i in xrange (0, 100):
ir = random.randrange (0, 256)
ig = random.randrange (0, 256)
ib = random.randrange (0, 256)
irgb = colormodels.irgb_color (ir, ig, ib)
irgb_string = colormodels.irgb_string_from_irgb (irgb)
irgb2 = colormodels.irgb_from_irgb_string (irgb_string)
irgb_string2 = colormodels.irgb_string_from_irgb (irgb2)
if (irgb[0] != irgb2[0]) or (irgb[1] != irgb2[1]) or (irgb[2] != irgb2[2]):
msg = 'irgb %s and irgb2 %s do not match' % (str (irgb), str (irgb2))
raise ValueError, msg
if (irgb_string != irgb_string2):
msg = 'irgb_string %s and irgb_string2 %s do not match' % (irgb_string, irgb_string2)
raise ValueError, msg
if verbose >= 1:
print 'Passed test_irgb_string()'
def test_irgb_string(verbose=1):
'''Convert back and forth from irgb and irgb_string.'''
for i in xrange(0, 100):
ir = random.randrange(0, 256)
ig = random.randrange(0, 256)
ib = random.randrange(0, 256)
irgb = colormodels.irgb_color(ir, ig, ib)
irgb_string = colormodels.irgb_string_from_irgb(irgb)
irgb2 = colormodels.irgb_from_irgb_string(irgb_string)
irgb_string2 = colormodels.irgb_string_from_irgb(irgb2)
if (irgb[0] != irgb2[0]) or (irgb[1] != irgb2[1]) or (irgb[2] !=
irgb2[2]):
msg = 'irgb %s and irgb2 %s do not match' % (str(irgb), str(irgb2))
raise ValueError(msg)
if (irgb_string != irgb_string2):
msg = 'irgb_string %s and irgb_string2 %s do not match' % (
irgb_string, irgb_string2)
raise ValueError(msg)
if verbose >= 1:
print('Passed test_irgb_string()')
def test_rgb_irgb (verbose=1):
'''Test that conversions between rgb and irgb are invertible.'''
for i in xrange (0, 100):
ir = random.randrange (0, 256)
ig = random.randrange (0, 256)
ib = random.randrange (0, 256)
irgb0 = colormodels.irgb_color (ir, ig, ib)
rgb0 = colormodels.rgb_from_irgb (irgb0)
irgb1 = colormodels.irgb_from_rgb (rgb0)
rgb1 = colormodels.rgb_from_irgb (irgb1)
if (irgb0[0] != irgb1[0]) or (irgb0[1] != irgb1[1]) or (irgb0[2] != irgb1[2]):
msg = 'irgb0 %s and irgb1 %s do not match' % (str (irgb0), str (irgb1))
raise ValueError, msg
tolerance = 1.0e-14
err_rgb = rgb1 - rgb0
err_r = math.fabs (err_rgb [0])
err_g = math.fabs (err_rgb [1])
err_b = math.fabs (err_rgb [2])
if (err_r > tolerance) or (err_g > tolerance) or (err_b > tolerance):
msg = 'rgb0 %s and rgb1 %s differ by %g' % (str (rgb0), str (rgb1), max (err_r,err_g,err_b))
raise ValueError, msg
if verbose >= 1:
print 'Passed test_rgb_irgb()'
