Coverage for difference/tests/test_cam02_ucs.py: 100%

1"""Define the unit tests for the :mod:`colour.difference.cam02_ucs` module.""" 

2 

3from __future__ import annotations 

4 

5from itertools import product 

6 

7import numpy as np 

8 

9from colour.constants import TOLERANCE_ABSOLUTE_TESTS 

10from colour.difference import delta_E_CAM02LCD, delta_E_CAM02SCD, delta_E_CAM02UCS 

11from colour.difference.cam02_ucs import delta_E_Luo2006 

12from colour.models.cam02_ucs import COEFFICIENTS_UCS_LUO2006 

13from colour.utilities import ignore_numpy_errors 

14 

15__author__ = "Colour Developers" 

16__copyright__ = "Copyright 2013 Colour Developers" 

17__license__ = "BSD-3-Clause - https://opensource.org/licenses/BSD-3-Clause" 

18__maintainer__ = "Colour Developers" 

19__email__ = "colour-developers@colour-science.org" 

20__status__ = "Production" 

21 

22__all__ = [ 

23 "TestDelta_E_Luo2006", 

24] 

25 

26 

27class TestDelta_E_Luo2006: 

28 """ 

29 Define :func:`colour.difference.cam02_ucs.delta_E_Luo2006` definition unit 

30 tests methods. 

31 """ 

32 

33 def test_delta_E_Luo2006(self) -> None: 

34 """Test :func:`colour.difference.cam02_ucs.delta_E_Luo2006` definition.""" 

35 

36 np.testing.assert_allclose( 

37 delta_E_Luo2006( 

38 np.array([54.90433134, -0.08450395, -0.06854831]), 

39 np.array([54.80352754, -3.96940084, -13.57591013]), 

40 COEFFICIENTS_UCS_LUO2006["CAM02-LCD"], 

41 ), 

42 14.055546437777583, 

43 atol=TOLERANCE_ABSOLUTE_TESTS, 

44 ) 

45 

46 np.testing.assert_allclose( 

47 delta_E_Luo2006( 

48 np.array([54.90433134, -0.08450395, -0.06854831]), 

49 np.array([54.80352754, -3.96940084, -13.57591013]), 

50 COEFFICIENTS_UCS_LUO2006["CAM02-LCD"], 

51 ), 

52 delta_E_CAM02LCD( 

53 np.array([54.90433134, -0.08450395, -0.06854831]), 

54 np.array([54.80352754, -3.96940084, -13.57591013]), 

55 ), 

56 atol=TOLERANCE_ABSOLUTE_TESTS, 

57 ) 

58 

59 np.testing.assert_allclose( 

60 delta_E_Luo2006( 

61 np.array([54.90433134, -0.08450395, -0.06854831]), 

62 np.array([54.80352754, -3.96940084, -13.57591013]), 

63 COEFFICIENTS_UCS_LUO2006["CAM02-SCD"], 

64 ), 

65 delta_E_CAM02SCD( 

66 np.array([54.90433134, -0.08450395, -0.06854831]), 

67 np.array([54.80352754, -3.96940084, -13.57591013]), 

68 ), 

69 atol=TOLERANCE_ABSOLUTE_TESTS, 

70 ) 

71 

72 np.testing.assert_allclose( 

73 delta_E_Luo2006( 

74 np.array([54.90433134, -0.08450395, -0.06854831]), 

75 np.array([54.80352754, -3.96940084, -13.57591013]), 

76 COEFFICIENTS_UCS_LUO2006["CAM02-UCS"], 

77 ), 

78 delta_E_CAM02UCS( 

79 np.array([54.90433134, -0.08450395, -0.06854831]), 

80 np.array([54.80352754, -3.96940084, -13.57591013]), 

81 ), 

82 atol=TOLERANCE_ABSOLUTE_TESTS, 

83 ) 

84 

85 def test_n_dimensional_delta_E_Luo2006(self) -> None: 

86 """ 

87 Test :func:`colour.difference.cam02_ucs.delta_E_Luo2006` definition 

88 n-dimensional arrays support. 

89 """ 

90 

91 Jpapbp_1 = np.array([54.90433134, -0.08450395, -0.06854831]) 

92 Jpapbp_2 = np.array([54.80352754, -3.96940084, -13.57591013]) 

93 delta_E_p = delta_E_Luo2006( 

94 Jpapbp_1, Jpapbp_2, COEFFICIENTS_UCS_LUO2006["CAM02-LCD"] 

95 ) 

96 

97 Jpapbp_1 = np.tile(Jpapbp_1, (6, 1)) 

98 Jpapbp_2 = np.tile(Jpapbp_2, (6, 1)) 

99 delta_E_p = np.tile(delta_E_p, 6) 

100 np.testing.assert_allclose( 

101 delta_E_Luo2006(Jpapbp_1, Jpapbp_2, COEFFICIENTS_UCS_LUO2006["CAM02-LCD"]), 

102 delta_E_p, 

103 atol=TOLERANCE_ABSOLUTE_TESTS, 

104 ) 

105 

106 Jpapbp_1 = np.reshape(Jpapbp_1, (2, 3, 3)) 

107 Jpapbp_2 = np.reshape(Jpapbp_2, (2, 3, 3)) 

108 delta_E_p = np.reshape(delta_E_p, (2, 3)) 

109 np.testing.assert_allclose( 

110 delta_E_Luo2006(Jpapbp_1, Jpapbp_2, COEFFICIENTS_UCS_LUO2006["CAM02-LCD"]), 

111 delta_E_p, 

112 atol=TOLERANCE_ABSOLUTE_TESTS, 

113 ) 

114 

115 @ignore_numpy_errors 

116 def test_nan_delta_E_Luo2006(self) -> None: 

117 """ 

118 Test :func:`colour.difference.cam02_ucs.delta_E_Luo2006` 

119 definition nan support. 

120 """ 

121 

122 cases = [-1.0, 0.0, 1.0, -np.inf, np.inf, np.nan] 

123 cases = np.array(list(set(product(cases, repeat=3)))) 

124 delta_E_Luo2006(cases, cases, COEFFICIENTS_UCS_LUO2006["CAM02-LCD"])