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ENH: delay importing colorspacious #89

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Merged
neutrinoceros merged 1 commit into from
Dec 24, 2022
Merged

ENH: delay importing colorspacious #89

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8 changes: 5 additions & 3 deletions cmyt/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,6 @@

import matplotlib
import numpy as np
from colorspacious import cspace_converter
from matplotlib.colors import Colormap
from matplotlib.colors import LinearSegmentedColormap
from more_itertools import always_iterable
Expand Down Expand Up @@ -122,12 +121,15 @@ def register_colormap(


graySCALE_CONVERSION_SPACE = "JCh"
_sRGB1_to_JCh = cspace_converter("sRGB1", graySCALE_CONVERSION_SPACE)
_JCh_to_sRGB1 = cspace_converter(graySCALE_CONVERSION_SPACE, "sRGB1")


def to_grayscale(sRGB1: np.ndarray) -> np.ndarray:
# this is adapted from viscm 0.8
from colorspacious import cspace_converter

_sRGB1_to_JCh = cspace_converter("sRGB1", graySCALE_CONVERSION_SPACE)
_JCh_to_sRGB1 = cspace_converter(graySCALE_CONVERSION_SPACE, "sRGB1")

JCh = _sRGB1_to_JCh(sRGB1)
JCh[..., 1] = 0
return np.clip(_JCh_to_sRGB1(JCh), 0, 1)
Expand Down