Coverage for colour/models/rgb/transfer_functions/tests/test_dcdm.py: 100%

1""" 

2Define the unit tests for the :mod:`colour.models.rgb.transfer_functions.dcdm` 

3module. 

4""" 

5 

6import numpy as np 

7 

8from colour.constants import TOLERANCE_ABSOLUTE_TESTS 

9from colour.models.rgb.transfer_functions import eotf_DCDM, eotf_inverse_DCDM 

10from colour.utilities import domain_range_scale, ignore_numpy_errors 

11 

12__author__ = "Colour Developers" 

13__copyright__ = "Copyright 2013 Colour Developers" 

14__license__ = "BSD-3-Clause - https://opensource.org/licenses/BSD-3-Clause" 

15__maintainer__ = "Colour Developers" 

16__email__ = "colour-developers@colour-science.org" 

17__status__ = "Production" 

18 

19__all__ = [ 

20 "TestEotf_inverse_DCDM", 

21 "TestEotf_DCDM", 

22] 

23 

24 

25class TestEotf_inverse_DCDM: 

26 """ 

27 Define :func:`colour.models.rgb.transfer_functions.dcdm.eotf_inverse_DCDM` 

28 definition unit tests methods. 

29 """ 

30 

31 def test_eotf_inverse_DCDM(self) -> None: 

32 """ 

33 Test :func:`colour.models.rgb.transfer_functions.\ 

34dcdm.eotf_inverse_DCDM` definition. 

35 """ 

36 

37 np.testing.assert_allclose( 

38 eotf_inverse_DCDM(0.0), 0.0, atol=TOLERANCE_ABSOLUTE_TESTS 

39 ) 

40 

41 np.testing.assert_allclose( 

42 eotf_inverse_DCDM(0.18), 0.11281861, atol=TOLERANCE_ABSOLUTE_TESTS 

43 ) 

44 

45 np.testing.assert_allclose( 

46 eotf_inverse_DCDM(1.0), 0.21817973, atol=TOLERANCE_ABSOLUTE_TESTS 

47 ) 

48 

49 assert eotf_inverse_DCDM(0.18, out_int=True) == 462 

50 

51 def test_n_dimensional_eotf_inverse_DCDM(self) -> None: 

52 """ 

53 Test :func:`colour.models.rgb.transfer_functions.dcdm.\ 

54eotf_inverse_DCDM` definition n-dimensional arrays support. 

55 """ 

56 

57 XYZ = 0.18 

58 XYZ_p = eotf_inverse_DCDM(XYZ) 

59 

60 XYZ = np.tile(XYZ, 6) 

61 XYZ_p = np.tile(XYZ_p, 6) 

62 np.testing.assert_allclose( 

63 eotf_inverse_DCDM(XYZ), XYZ_p, atol=TOLERANCE_ABSOLUTE_TESTS 

64 ) 

65 

66 XYZ = np.reshape(XYZ, (2, 3)) 

67 XYZ_p = np.reshape(XYZ_p, (2, 3)) 

68 np.testing.assert_allclose( 

69 eotf_inverse_DCDM(XYZ), XYZ_p, atol=TOLERANCE_ABSOLUTE_TESTS 

70 ) 

71 

72 XYZ = np.reshape(XYZ, (2, 3, 1)) 

73 XYZ_p = np.reshape(XYZ_p, (2, 3, 1)) 

74 np.testing.assert_allclose( 

75 eotf_inverse_DCDM(XYZ), XYZ_p, atol=TOLERANCE_ABSOLUTE_TESTS 

76 ) 

77 

78 def test_domain_range_scale_eotf_inverse_DCDM(self) -> None: 

79 """ 

80 Test :func:`colour.models.rgb.transfer_functions.\ 

81dcdm.eotf_inverse_DCDM` definition domain and range scale support. 

82 """ 

83 

84 XYZ = 0.18 

85 XYZ_p = eotf_inverse_DCDM(XYZ) 

86 

87 d_r = (("reference", 1), ("1", 1), ("100", 1)) 

88 for scale, factor in d_r: 

89 with domain_range_scale(scale): 

90 np.testing.assert_allclose( 

91 eotf_inverse_DCDM(XYZ * factor), 

92 XYZ_p * factor, 

93 atol=TOLERANCE_ABSOLUTE_TESTS, 

94 ) 

95 

96 @ignore_numpy_errors 

97 def test_nan_eotf_inverse_DCDM(self) -> None: 

98 """ 

99 Test :func:`colour.models.rgb.transfer_functions.dcdm.\ 

100eotf_inverse_DCDM` definition nan support. 

101 """ 

102 

103 eotf_inverse_DCDM(np.array([-1.0, 0.0, 1.0, -np.inf, np.inf, np.nan])) 

104 

105 

106class TestEotf_DCDM: 

107 """ 

108 Define :func:`colour.models.rgb.transfer_functions.dcdm.eotf_DCDM` 

109 definition unit tests methods. 

110 """ 

111 

112 def test_eotf_DCDM(self) -> None: 

113 """ 

114 Test :func:`colour.models.rgb.transfer_functions.dcdm.eotf_DCDM` 

115 definition. 

116 """ 

117 

118 np.testing.assert_allclose(eotf_DCDM(0.0), 0.0, atol=TOLERANCE_ABSOLUTE_TESTS) 

119 

120 np.testing.assert_allclose( 

121 eotf_DCDM(0.11281861), 0.18, atol=TOLERANCE_ABSOLUTE_TESTS 

122 ) 

123 

124 np.testing.assert_allclose( 

125 eotf_DCDM(0.21817973), 1.0, atol=TOLERANCE_ABSOLUTE_TESTS 

126 ) 

127 

128 np.testing.assert_allclose(eotf_DCDM(462, in_int=True), 0.18, atol=1e-5) 

129 

130 def test_n_dimensional_eotf_DCDM(self) -> None: 

131 """ 

132 Test :func:`colour.models.rgb.transfer_functions.dcdm.eotf_DCDM` 

133 definition n-dimensional arrays support. 

134 """ 

135 

136 XYZ_p = 0.11281861 

137 XYZ = eotf_DCDM(XYZ_p) 

138 

139 XYZ_p = np.tile(XYZ_p, 6) 

140 XYZ = np.tile(XYZ, 6) 

141 np.testing.assert_allclose(eotf_DCDM(XYZ_p), XYZ, atol=TOLERANCE_ABSOLUTE_TESTS) 

142 

143 XYZ_p = np.reshape(XYZ_p, (2, 3)) 

144 XYZ = np.reshape(XYZ, (2, 3)) 

145 np.testing.assert_allclose(eotf_DCDM(XYZ_p), XYZ, atol=TOLERANCE_ABSOLUTE_TESTS) 

146 

147 XYZ_p = np.reshape(XYZ_p, (2, 3, 1)) 

148 XYZ = np.reshape(XYZ, (2, 3, 1)) 

149 np.testing.assert_allclose(eotf_DCDM(XYZ_p), XYZ, atol=TOLERANCE_ABSOLUTE_TESTS) 

150 

151 def test_domain_range_scale_eotf_DCDM(self) -> None: 

152 """ 

153 Test :func:`colour.models.rgb.transfer_functions.dcdm.eotf_DCDM` 

154 definition domain and range scale support. 

155 """ 

156 

157 XYZ_p = 0.11281861 

158 XYZ = eotf_DCDM(XYZ_p) 

159 

160 d_r = (("reference", 1), ("1", 1), ("100", 1)) 

161 for scale, factor in d_r: 

162 with domain_range_scale(scale): 

163 np.testing.assert_allclose( 

164 eotf_DCDM(XYZ_p * factor), 

165 XYZ * factor, 

166 atol=TOLERANCE_ABSOLUTE_TESTS, 

167 ) 

168 

169 @ignore_numpy_errors 

170 def test_nan_eotf_DCDM(self) -> None: 

171 """ 

172 Test :func:`colour.models.rgb.transfer_functions.dcdm.eotf_DCDM` 

173 definition nan support. 

174 """ 

175 

176 eotf_DCDM(np.array([-1.0, 0.0, 1.0, -np.inf, np.inf, np.nan]))