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

1"""Define the unit tests for the :mod:`colour.models.rgb.cmyk` 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.rgb.cmyk import CMY_to_CMYK, CMY_to_RGB, CMYK_to_CMY, RGB_to_CMY 

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 "TestRGB_to_CMY", 

22 "TestCMY_to_RGB", 

23 "TestCMY_to_CMYK", 

24 "TestCMYK_to_CMY", 

25] 

26 

27 

28class TestRGB_to_CMY: 

29 """ 

30 Define :func:`colour.models.rgb.cmyk.RGB_to_CMY` definition unit tests 

31 methods. 

32 """ 

33 

34 def test_RGB_to_CMY(self) -> None: 

35 """Test :func:`colour.models.rgb.cmyk.RGB_to_CMY` definition.""" 

36 

37 np.testing.assert_allclose( 

38 RGB_to_CMY(np.array([0.45620519, 0.03081071, 0.04091952])), 

39 np.array([0.54379481, 0.96918929, 0.95908048]), 

40 atol=TOLERANCE_ABSOLUTE_TESTS, 

41 ) 

42 

43 np.testing.assert_allclose( 

44 RGB_to_CMY(np.array([0.00000000, 0.00000000, 0.00000000])), 

45 np.array([1.00000000, 1.00000000, 1.00000000]), 

46 atol=TOLERANCE_ABSOLUTE_TESTS, 

47 ) 

48 

49 np.testing.assert_allclose( 

50 RGB_to_CMY(np.array([1.00000000, 1.00000000, 1.00000000])), 

51 np.array([0.00000000, 0.00000000, 0.00000000]), 

52 atol=TOLERANCE_ABSOLUTE_TESTS, 

53 ) 

54 

55 def test_n_dimensional_RGB_to_CMY(self) -> None: 

56 """ 

57 Test :func:`colour.models.rgb.cmyk.RGB_to_CMY` definition 

58 n-dimensional arrays support. 

59 """ 

60 

61 RGB = np.array([0.45620519, 0.03081071, 0.04091952]) 

62 CMY = RGB_to_CMY(RGB) 

63 

64 RGB = np.tile(RGB, (6, 1)) 

65 CMY = np.tile(CMY, (6, 1)) 

66 np.testing.assert_allclose(RGB_to_CMY(RGB), CMY, atol=TOLERANCE_ABSOLUTE_TESTS) 

67 

68 RGB = np.reshape(RGB, (2, 3, 3)) 

69 CMY = np.reshape(CMY, (2, 3, 3)) 

70 np.testing.assert_allclose(RGB_to_CMY(RGB), CMY, atol=TOLERANCE_ABSOLUTE_TESTS) 

71 

72 def test_domain_range_scale_RGB_to_CMY(self) -> None: 

73 """ 

74 Test :func:`colour.models.rgb.cmyk.RGB_to_CMY` definition domain and 

75 range scale support. 

76 """ 

77 

78 RGB = np.array([0.45620519, 0.03081071, 0.04091952]) 

79 CMY = RGB_to_CMY(RGB) 

80 

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

82 for scale, factor in d_r: 

83 with domain_range_scale(scale): 

84 np.testing.assert_allclose( 

85 RGB_to_CMY(RGB * factor), 

86 CMY * factor, 

87 atol=TOLERANCE_ABSOLUTE_TESTS, 

88 ) 

89 

90 @ignore_numpy_errors 

91 def test_nan_RGB_to_CMY(self) -> None: 

92 """ 

93 Test :func:`colour.models.rgb.cmyk.RGB_to_CMY` definition nan 

94 support. 

95 """ 

96 

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

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

99 RGB_to_CMY(cases) 

100 

101 

102class TestCMY_to_RGB: 

103 """ 

104 Define :func:`colour.models.rgb.cmyk.CMY_to_RGB` definition unit tests 

105 methods. 

106 """ 

107 

108 def test_CMY_to_RGB(self) -> None: 

109 """Test :func:`colour.models.rgb.cmyk.CMY_to_RGB` definition.""" 

110 

111 np.testing.assert_allclose( 

112 CMY_to_RGB(np.array([0.54379481, 0.96918929, 0.95908048])), 

113 np.array([0.45620519, 0.03081071, 0.04091952]), 

114 atol=TOLERANCE_ABSOLUTE_TESTS, 

115 ) 

116 

117 np.testing.assert_allclose( 

118 CMY_to_RGB(np.array([1.00000000, 1.00000000, 1.00000000])), 

119 np.array([0.00000000, 0.00000000, 0.00000000]), 

120 atol=TOLERANCE_ABSOLUTE_TESTS, 

121 ) 

122 

123 np.testing.assert_allclose( 

124 CMY_to_RGB(np.array([0.00000000, 0.00000000, 0.00000000])), 

125 np.array([1.00000000, 1.00000000, 1.00000000]), 

126 atol=TOLERANCE_ABSOLUTE_TESTS, 

127 ) 

128 

129 def test_n_dimensional_CMY_to_RGB(self) -> None: 

130 """ 

131 Test :func:`colour.models.rgb.cmyk.CMY_to_RGB` definition 

132 n-dimensional arrays support. 

133 """ 

134 

135 CMY = np.array([0.54379481, 0.96918929, 0.95908048]) 

136 RGB = CMY_to_RGB(CMY) 

137 

138 CMY = np.tile(CMY, (6, 1)) 

139 RGB = np.tile(RGB, (6, 1)) 

140 np.testing.assert_allclose(CMY_to_RGB(CMY), RGB, atol=TOLERANCE_ABSOLUTE_TESTS) 

141 

142 CMY = np.reshape(CMY, (2, 3, 3)) 

143 RGB = np.reshape(RGB, (2, 3, 3)) 

144 np.testing.assert_allclose(CMY_to_RGB(CMY), RGB, atol=TOLERANCE_ABSOLUTE_TESTS) 

145 

146 def test_domain_range_scale_CMY_to_RGB(self) -> None: 

147 """ 

148 Test :func:`colour.models.rgb.cmyk.CMY_to_RGB` definition domain and 

149 range scale support. 

150 """ 

151 

152 CMY = np.array([0.54379481, 0.96918929, 0.95908048]) 

153 RGB = CMY_to_RGB(CMY) 

154 

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

156 for scale, factor in d_r: 

157 with domain_range_scale(scale): 

158 np.testing.assert_allclose( 

159 CMY_to_RGB(CMY * factor), 

160 RGB * factor, 

161 atol=TOLERANCE_ABSOLUTE_TESTS, 

162 ) 

163 

164 @ignore_numpy_errors 

165 def test_nan_CMY_to_RGB(self) -> None: 

166 """Test :func:`colour.models.rgb.cmyk.CMY_to_RGB` definition nan support.""" 

167 

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

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

170 CMY_to_RGB(cases) 

171 

172 

173class TestCMY_to_CMYK: 

174 """ 

175 Define :func:`colour.models.rgb.cmyk.CMY_to_CMYK` definition unit tests 

176 methods. 

177 """ 

178 

179 def test_CMY_to_CMYK(self) -> None: 

180 """Test :func:`colour.models.rgb.cmyk.CMY_to_CMYK` definition.""" 

181 

182 np.testing.assert_allclose( 

183 CMY_to_CMYK(np.array([0.54379481, 0.96918929, 0.95908048])), 

184 np.array([0.00000000, 0.93246304, 0.91030457, 0.54379481]), 

185 atol=TOLERANCE_ABSOLUTE_TESTS, 

186 ) 

187 

188 np.testing.assert_allclose( 

189 CMY_to_CMYK(np.array([0.15000000, 1.00000000, 1.00000000])), 

190 np.array([0.00000000, 1.00000000, 1.00000000, 0.15000000]), 

191 atol=TOLERANCE_ABSOLUTE_TESTS, 

192 ) 

193 

194 np.testing.assert_allclose( 

195 CMY_to_CMYK(np.array([0.15000000, 0.00000000, 0.00000000])), 

196 np.array([0.15000000, 0.00000000, 0.00000000, 0.00000000]), 

197 atol=TOLERANCE_ABSOLUTE_TESTS, 

198 ) 

199 

200 def test_n_dimensional_CMY_to_CMYK(self) -> None: 

201 """ 

202 Test :func:`colour.models.rgb.cmyk.CMY_to_CMYK` definition 

203 n-dimensional arrays support. 

204 """ 

205 

206 CMY = np.array([0.54379481, 0.96918929, 0.95908048]) 

207 CMYK = CMY_to_CMYK(CMY) 

208 

209 CMY = np.tile(CMY, (6, 1)) 

210 CMYK = np.tile(CMYK, (6, 1)) 

211 np.testing.assert_allclose( 

212 CMY_to_CMYK(CMY), CMYK, atol=TOLERANCE_ABSOLUTE_TESTS 

213 ) 

214 

215 CMY = np.reshape(CMY, (2, 3, 3)) 

216 CMYK = np.reshape(CMYK, (2, 3, 4)) 

217 np.testing.assert_allclose( 

218 CMY_to_CMYK(CMY), CMYK, atol=TOLERANCE_ABSOLUTE_TESTS 

219 ) 

220 

221 def test_domain_range_scale_CMY_to_CMYK(self) -> None: 

222 """ 

223 Test :func:`colour.models.rgb.cmyk.CMY_to_CMYK` definition domain and 

224 range scale support. 

225 """ 

226 

227 CMY = np.array([0.54379481, 0.96918929, 0.95908048]) 

228 CMYK = CMY_to_CMYK(CMY) 

229 

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

231 for scale, factor in d_r: 

232 with domain_range_scale(scale): 

233 np.testing.assert_allclose( 

234 CMY_to_CMYK(CMY * factor), 

235 CMYK * factor, 

236 atol=TOLERANCE_ABSOLUTE_TESTS, 

237 ) 

238 

239 @ignore_numpy_errors 

240 def test_nan_CMY_to_CMYK(self) -> None: 

241 """ 

242 Test :func:`colour.models.rgb.cmyk.CMY_to_CMYK` definition nan 

243 support. 

244 """ 

245 

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

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

248 CMY_to_CMYK(cases) 

249 

250 

251class TestCMYK_to_CMY: 

252 """ 

253 Define :func:`colour.models.rgb.cmyk.CMYK_to_CMY` definition unit tests 

254 methods. 

255 """ 

256 

257 def test_CMYK_to_CMY(self) -> None: 

258 """Test :func:`colour.models.rgb.cmyk.CMYK_to_CMY` definition.""" 

259 

260 np.testing.assert_allclose( 

261 CMYK_to_CMY(np.array([0.00000000, 0.93246304, 0.91030457, 0.54379481])), 

262 np.array([0.54379481, 0.96918929, 0.95908048]), 

263 atol=TOLERANCE_ABSOLUTE_TESTS, 

264 ) 

265 

266 np.testing.assert_allclose( 

267 CMYK_to_CMY(np.array([0.00000000, 1.00000000, 1.00000000, 0.15000000])), 

268 np.array([0.15000000, 1.00000000, 1.00000000]), 

269 atol=TOLERANCE_ABSOLUTE_TESTS, 

270 ) 

271 

272 np.testing.assert_allclose( 

273 CMYK_to_CMY(np.array([0.15000000, 0.00000000, 0.00000000, 0.00000000])), 

274 np.array([0.15000000, 0.00000000, 0.00000000]), 

275 atol=TOLERANCE_ABSOLUTE_TESTS, 

276 ) 

277 

278 def test_n_dimensional_CMYK_to_CMY(self) -> None: 

279 """ 

280 Test :func:`colour.models.rgb.cmyk.CMYK_to_CMY` definition 

281 n-dimensional arrays support. 

282 """ 

283 

284 CMYK = np.array([0.00000000, 0.93246304, 0.91030457, 0.54379481]) 

285 CMY = CMYK_to_CMY(CMYK) 

286 

287 CMYK = np.tile(CMYK, (6, 1)) 

288 CMY = np.tile(CMY, (6, 1)) 

289 np.testing.assert_allclose( 

290 CMYK_to_CMY(CMYK), CMY, atol=TOLERANCE_ABSOLUTE_TESTS 

291 ) 

292 

293 CMYK = np.reshape(CMYK, (2, 3, 4)) 

294 CMY = np.reshape(CMY, (2, 3, 3)) 

295 np.testing.assert_allclose( 

296 CMYK_to_CMY(CMYK), CMY, atol=TOLERANCE_ABSOLUTE_TESTS 

297 ) 

298 

299 def test_domain_range_scale_CMYK_to_CMY(self) -> None: 

300 """ 

301 Test :func:`colour.models.rgb.cmyk.CMYK_to_CMY` definition domain and 

302 range scale support. 

303 """ 

304 

305 CMYK = np.array([0.00000000, 0.93246304, 0.91030457, 0.54379481]) 

306 CMY = CMYK_to_CMY(CMYK) 

307 

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

309 for scale, factor in d_r: 

310 with domain_range_scale(scale): 

311 np.testing.assert_allclose( 

312 CMYK_to_CMY(CMYK * factor), 

313 CMY * factor, 

314 atol=TOLERANCE_ABSOLUTE_TESTS, 

315 ) 

316 

317 @ignore_numpy_errors 

318 def test_nan_CMYK_to_CMY(self) -> None: 

319 """ 

320 Test :func:`colour.models.rgb.cmyk.CMYK_to_CMY` definition nan 

321 support. 

322 """ 

323 

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

325 cases = np.array(list(set(product(cases, repeat=4)))) 

326 CMYK_to_CMY(cases)