def cmyk2rgb(in_val,
profile_rgb=None,
profile_cmyk=None,
intent=RELATIVE_COLORIMETRIC):
if profile_rgb != None:
prgb = lc.cmsOpenProfileFromFile(profile_rgb,
'r') # cmsCreate_sRGBProfile()
else:
prgb = lc.cmsCreate_sRGBProfile()
pcmyk = lc.cmsOpenProfileFromFile(profile_cmyk, 'r')
transform = lc.cmsCreateTransform(
pcmyk, lc.TYPE_CMYK_8, prgb, lc.TYPE_RGB_8, intent,
lc.cmsFLAGS_NOCACHE | lc.cmsFLAGS_NOOPTIMIZE
| lc.cmsFLAGS_BLACKPOINTCOMPENSATION | lc.cmsFLAGS_HIGHRESPRECALC)
n_pixels = 1
in_comps = 4
out_comps = 3
buf_in = lc.uint8Array(in_comps * n_pixels)
buf_out = lc.uint8Array(out_comps * n_pixels)
for i in range(in_comps):
buf_in[i] = max(0, min(255, round(in_val[i] / 100 * 255)))
lc.cmsDoTransform(transform, buf_in, buf_out, n_pixels)
lc.cmsCloseProfile(prgb)
lc.cmsCloseProfile(pcmyk)
lc.cmsDeleteTransform(transform)
return tuple(buf_out[i] for i in range(out_comps * n_pixels))
def cmyk2lab(in_val, profile_cmyk, intent=RELATIVE_COLORIMETRIC):
white = lc.cmsD50_xyY() # Set white point for D50
plab = lc.cmsCreateLab4Profile(white)
pcmyk = lc.cmsOpenProfileFromFile(profile_cmyk, 'r')
transform = lc.cmsCreateTransform(
pcmyk, lc.TYPE_CMYK_8, plab, lc.TYPE_Lab_DBL, intent,
lc.cmsFLAGS_NOCACHE | lc.cmsFLAGS_NOOPTIMIZE
| lc.cmsFLAGS_BLACKPOINTCOMPENSATION | lc.cmsFLAGS_HIGHRESPRECALC)
n_pixels = 1
in_comps = 4
out_comps = 3
buf_in = lc.uint8Array(in_comps * n_pixels)
buf_out = lc.doubleArray(out_comps * n_pixels)
for i in range(in_comps):
buf_in[i] = max(0, min(255, round(in_val[i] / 100 * 255)))
lc.cmsDoTransform(transform, buf_in, buf_out, n_pixels)
lc.cmsCloseProfile(plab)
lc.cmsCloseProfile(pcmyk)
lc.cmsDeleteTransform(transform)
return tuple(buf_out[i] for i in range(out_comps * n_pixels))
def lab2rgb(in_val, profile_rgb=None, intent=RELATIVE_COLORIMETRIC):
white = lc.cmsD50_xyY() # Set white point for D50
if profile_rgb != None:
prgb = lc.cmsOpenProfileFromFile(profile_rgb, 'r')
else:
prgb = lc.cmsCreate_sRGBProfile()
plab = lc.cmsCreateLab4Profile(white)
transform = lc.cmsCreateTransform(
plab, lc.TYPE_Lab_DBL, prgb, lc.TYPE_RGB_8, intent,
lc.cmsFLAGS_NOCACHE | lc.cmsFLAGS_NOOPTIMIZE
| lc.cmsFLAGS_BLACKPOINTCOMPENSATION | lc.cmsFLAGS_HIGHRESPRECALC)
n_pixels = 1
in_comps = 3
out_comps = 3
buf_in = lc.doubleArray(in_comps * n_pixels)
buf_out = lc.uint8Array(out_comps * n_pixels)
for i in range(in_comps):
buf_in[i] = in_val[i]
lc.cmsDoTransform(transform, buf_in, buf_out, n_pixels)
lc.cmsCloseProfile(prgb)
lc.cmsCloseProfile(plab)
lc.cmsDeleteTransform(transform)
return tuple(buf_out[i] for i in range(out_comps * n_pixels))