Coverage for colour/models/tests/test_osa_ucs.py: 100%

1"""Define the unit tests for the :mod:`colour.models.osa_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.models import OSA_UCS_to_XYZ, XYZ_to_OSA_UCS 

11from colour.utilities import domain_range_scale, ignore_numpy_errors 

12 

13__author__ = "Colour Developers" 

14__copyright__ = "Copyright 2013 Colour Developers" 

15__license__ = "BSD-3-Clause - https://opensource.org/licenses/BSD-3-Clause" 

16__maintainer__ = "Colour Developers" 

17__email__ = "colour-developers@colour-science.org" 

18__status__ = "Production" 

19 

20__all__ = [ 

21 "TestXYZ_to_OSA_UCS", 

22 "TestOSA_UCS_to_XYZ", 

23] 

24 

25 

26class TestXYZ_to_OSA_UCS: 

27 """ 

28 Define :func:`colour.models.osa_ucs.XYZ_to_OSA_UCS` definition unit tests 

29 methods. 

30 """ 

31 

32 def test_XYZ_to_OSA_UCS(self) -> None: 

33 """Test :func:`colour.models.osa_ucs.XYZ_to_OSA_UCS` definition.""" 

34 

35 np.testing.assert_allclose( 

36 XYZ_to_OSA_UCS(np.array([0.20654008, 0.12197225, 0.05136952]) * 100), 

37 np.array([-3.00499790, 2.99713697, -9.66784231]), 

38 atol=TOLERANCE_ABSOLUTE_TESTS, 

39 ) 

40 

41 np.testing.assert_allclose( 

42 XYZ_to_OSA_UCS(np.array([0.14222010, 0.23042768, 0.10495772]) * 100), 

43 np.array([-1.64657491, 4.59201565, 5.31738757]), 

44 atol=TOLERANCE_ABSOLUTE_TESTS, 

45 ) 

46 

47 np.testing.assert_allclose( 

48 XYZ_to_OSA_UCS(np.array([0.07818780, 0.06157201, 0.28099326]) * 100), 

49 np.array([-5.08589672, -7.91062749, 0.98107575]), 

50 atol=TOLERANCE_ABSOLUTE_TESTS, 

51 ) 

52 

53 def test_n_dimensional_XYZ_to_OSA_UCS(self) -> None: 

54 """ 

55 Test :func:`colour.models.osa_ucs.XYZ_to_OSA_UCS` definition 

56 n-dimensional support. 

57 """ 

58 

59 XYZ = np.array([0.20654008, 0.12197225, 0.05136952]) * 100 

60 Ljg = XYZ_to_OSA_UCS(XYZ) 

61 

62 XYZ = np.tile(XYZ, (6, 1)) 

63 Ljg = np.tile(Ljg, (6, 1)) 

64 np.testing.assert_allclose( 

65 XYZ_to_OSA_UCS(XYZ), Ljg, atol=TOLERANCE_ABSOLUTE_TESTS 

66 ) 

67 

68 XYZ = np.reshape(XYZ, (2, 3, 3)) 

69 Ljg = np.reshape(Ljg, (2, 3, 3)) 

70 np.testing.assert_allclose( 

71 XYZ_to_OSA_UCS(XYZ), Ljg, atol=TOLERANCE_ABSOLUTE_TESTS 

72 ) 

73 

74 def test_domain_range_scale_XYZ_to_OSA_UCS(self) -> None: 

75 """ 

76 Test :func:`colour.models.osa_ucs.XYZ_to_OSA_UCS` definition domain 

77 and range scale support. 

78 """ 

79 

80 XYZ = np.array([0.20654008, 0.12197225, 0.05136952]) * 100 

81 Ljg = XYZ_to_OSA_UCS(XYZ) 

82 

83 d_r = (("reference", 1), ("1", 0.01), ("100", 1)) 

84 for scale, factor in d_r: 

85 with domain_range_scale(scale): 

86 np.testing.assert_allclose( 

87 XYZ_to_OSA_UCS(XYZ * factor), 

88 Ljg * factor, 

89 atol=TOLERANCE_ABSOLUTE_TESTS, 

90 ) 

91 

92 @ignore_numpy_errors 

93 def test_nan_XYZ_to_OSA_UCS(self) -> None: 

94 """ 

95 Test :func:`colour.models.osa_ucs.XYZ_to_OSA_UCS` definition nan 

96 support. 

97 """ 

98 

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

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

101 XYZ_to_OSA_UCS(cases) 

102 

103 

104class TestOSA_UCS_to_XYZ: 

105 """ 

106 Define :func:`colour.models.osa_ucs.OSA_UCS_to_XYZ` definition unit tests 

107 methods. 

108 """ 

109 

110 def test_OSA_UCS_to_XYZ(self) -> None: 

111 """Test :func:`colour.models.osa_ucs.OSA_UCS_to_XYZ` definition.""" 

112 

113 np.testing.assert_allclose( 

114 OSA_UCS_to_XYZ( 

115 np.array([-3.00499790, 2.99713697, -9.66784231]), 

116 {"disp": False}, 

117 ), 

118 np.array([0.20654008, 0.12197225, 0.05136952]) * 100, 

119 atol=5e-5, 

120 ) 

121 

122 np.testing.assert_allclose( 

123 OSA_UCS_to_XYZ( 

124 np.array([-1.64657491, 4.59201565, 5.31738757]), 

125 {"disp": False}, 

126 ), 

127 np.array([0.14222010, 0.23042768, 0.10495772]) * 100, 

128 atol=5e-5, 

129 ) 

130 

131 np.testing.assert_allclose( 

132 OSA_UCS_to_XYZ( 

133 np.array([-5.08589672, -7.91062749, 0.98107575]), 

134 {"disp": False}, 

135 ), 

136 np.array([0.07818780, 0.06157201, 0.28099326]) * 100, 

137 atol=5e-5, 

138 ) 

139 

140 def test_n_dimensional_OSA_UCS_to_XYZ(self) -> None: 

141 """ 

142 Test :func:`colour.models.osa_ucs.OSA_UCS_to_XYZ` definition 

143 n-dimensional support. 

144 """ 

145 

146 Ljg = np.array([-3.00499790, 2.99713697, -9.66784231]) 

147 XYZ = OSA_UCS_to_XYZ(Ljg) 

148 

149 Ljg = np.tile(Ljg, (6, 1)) 

150 XYZ = np.tile(XYZ, (6, 1)) 

151 np.testing.assert_allclose( 

152 OSA_UCS_to_XYZ(Ljg), XYZ, atol=TOLERANCE_ABSOLUTE_TESTS 

153 ) 

154 

155 Ljg = np.reshape(Ljg, (2, 3, 3)) 

156 XYZ = np.reshape(XYZ, (2, 3, 3)) 

157 np.testing.assert_allclose( 

158 OSA_UCS_to_XYZ(Ljg), XYZ, atol=TOLERANCE_ABSOLUTE_TESTS 

159 ) 

160 

161 def test_domain_range_scale_OSA_UCS_to_XYZ(self) -> None: 

162 """ 

163 Test :func:`colour.models.osa_ucs.OSA_UCS_to_XYZ` definition domain 

164 and range scale support. 

165 """ 

166 

167 Ljg = np.array([-3.00499790, 2.99713697, -9.66784231]) 

168 XYZ = OSA_UCS_to_XYZ(Ljg) 

169 

170 d_r = (("reference", 1), ("1", 0.01), ("100", 1)) 

171 for scale, factor in d_r: 

172 with domain_range_scale(scale): 

173 np.testing.assert_allclose( 

174 OSA_UCS_to_XYZ(Ljg * factor), 

175 XYZ * factor, 

176 atol=TOLERANCE_ABSOLUTE_TESTS, 

177 ) 

178 

179 @ignore_numpy_errors 

180 def test_nan_OSA_UCS_to_XYZ(self) -> None: 

181 """ 

182 Test :func:`colour.models.osa_ucs.OSA_UCS_to_XYZ` definition nan 

183 support. 

184 """ 

185 

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

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

188 OSA_UCS_to_XYZ(cases)