67 lines
2.4 KiB
Python
67 lines
2.4 KiB
Python
#!/usr/bin/env python
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# -*- coding: iso-8859-1 -*-
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import math, convert_colormodels
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def rad_dif(Msh1,Msh2,white):
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HSL1 = convert_colormodels.RGB2HSL(convert_colormodels.XYZ2RGB(convert_colormodels.CIELab2XYZ(convert_colormodels.Msh2CIELab(Msh1),white)))
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HSL2 = convert_colormodels.RGB2HSL(convert_colormodels.XYZ2RGB(convert_colormodels.CIELab2XYZ(convert_colormodels.Msh2CIELab(Msh2),white)))
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return abs(HSL1[0]*math.pi/180.0-HSL2[0]*math.pi/180.0)
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def adjust_hue(Msh_sat,M_unsat):
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if Msh_sat[0] >= M_unsat:
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return Msh_sat[2]
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else:
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hSpin = Msh_sat[1]*math.sqrt((M_unsat)**2.0-(Msh_sat[0])**2)/(Msh_sat[0]*math.sin(Msh_sat[1]))
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if Msh_sat[2] > - math.pi/3.0:
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return Msh_sat[2] + hSpin
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else:
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return Msh_sat[2] - hSpin
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def interpolate_color(RGB1,RGB2,white,interp):
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Msh1 = convert_colormodels.CIELab2Msh(convert_colormodels.XYZ2CIELab(convert_colormodels.RGB2XYZ(RGB1),white))
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Msh2 = convert_colormodels.CIELab2Msh(convert_colormodels.XYZ2CIELab(convert_colormodels.RGB2XYZ(RGB2),white))
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Msh_mid = [0.0,0.0,0.0]
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if ((Msh1[1] > 0.05 and Msh2[1] > 0.05) and rad_dif(Msh1,Msh2,white) > math.pi/3.0):
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Msh_mid[0] = max(Msh1[0],Msh2[0],88.0)
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if interp < 0.5:
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Msh2[0] = Msh_mid[0]
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Msh2[1] = 0.0
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Msh2[2] = 0.0
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interp = 2.0*interp
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else:
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Msh1[0] = Msh_mid[0]
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Msh1[1] = 0.0
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Msh1[2] = 0.0
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interp = 2.0*interp - 1.0
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if (Msh1[1] < 0.05) and (Msh2[1] > 0.05):
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Msh1[2] = adjust_hue(Msh2,Msh1[0])
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elif (Msh2[1] < 0.05) and (Msh1[1] > 0.05):
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Msh2[2] = adjust_hue(Msh1,Msh2[0])
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for i in range(3):
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Msh_mid[i] = (1.0-interp)*Msh1[i] + interp* Msh2[i]
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return convert_colormodels.XYZ2RGB(convert_colormodels.CIELab2XYZ(convert_colormodels.Msh2CIELab(Msh_mid),white))
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test1 = [0.231372549,0.298039216,0.752941176]
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test2 = [0.705882353,0.015686275,0.149019608]
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#test1 = [0.0,1.0,24.0/255.0]
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#test1 = [0.5,0.5,0.5]
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#test2 = [0.0,151.0/255.0,21.0/255.0]
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x=0.950456
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y=1.0
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z=1.088754
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white = [x, y, z]
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test = test1
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iteration = 33
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delta = 1.0/float(iteration-1)
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f = -delta
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for i in range(iteration):
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f = f + delta
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test = test + interpolate_color(test1,test2,white,f)
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test = test + test2
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for i in range(iteration):
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print i
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print test[3*i+3]*255.0
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print test[3*i+1+3]*255.0
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print test[3*i+2+3]*255.0, '\n'
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