Coverage for colour/models/tests/test_din99.py: 100%

1"""Define the unit tests for the :mod:`colour.models.din99` 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 DIN99_to_Lab, DIN99_to_XYZ, Lab_to_DIN99, XYZ_to_DIN99 

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 "TestLab_to_DIN99", 

22 "TestDIN99_to_Lab", 

23 "TestXYZ_to_DIN99", 

24 "TestDIN99_to_XYZ", 

25] 

26 

27 

28class TestLab_to_DIN99: 

29 """ 

30 Define :func:`colour.models.din99.Lab_to_DIN99` definition unit tests 

31 methods. 

32 """ 

33 

34 def test_Lab_to_DIN99(self) -> None: 

35 """Test :func:`colour.models.din99.Lab_to_DIN99` definition.""" 

36 

37 np.testing.assert_allclose( 

38 Lab_to_DIN99(np.array([41.52787529, 52.63858304, 26.92317922])), 

39 np.array([53.22821988, 28.41634656, 3.89839552]), 

40 atol=TOLERANCE_ABSOLUTE_TESTS, 

41 ) 

42 

43 np.testing.assert_allclose( 

44 Lab_to_DIN99(np.array([55.11636304, -41.08791787, 30.91825778])), 

45 np.array([66.08943912, -17.35290106, 16.09690691]), 

46 atol=TOLERANCE_ABSOLUTE_TESTS, 

47 ) 

48 

49 np.testing.assert_allclose( 

50 Lab_to_DIN99(np.array([29.80565520, 20.01830466, -48.34913874])), 

51 np.array([40.71533366, 3.48714163, -21.45321411]), 

52 atol=TOLERANCE_ABSOLUTE_TESTS, 

53 ) 

54 

55 np.testing.assert_allclose( 

56 Lab_to_DIN99( 

57 np.array([41.52787529, 52.63858304, 26.92317922]), 

58 method="DIN99b", 

59 ), 

60 np.array([45.58303137, 34.71824493, 17.61622149]), 

61 atol=TOLERANCE_ABSOLUTE_TESTS, 

62 ) 

63 

64 np.testing.assert_allclose( 

65 Lab_to_DIN99( 

66 np.array([41.52787529, 52.63858304, 26.92317922]), 

67 method="DIN99c", 

68 ), 

69 np.array([45.40284208, 32.75074741, 15.74603532]), 

70 atol=TOLERANCE_ABSOLUTE_TESTS, 

71 ) 

72 

73 np.testing.assert_allclose( 

74 Lab_to_DIN99( 

75 np.array([41.52787529, 52.63858304, 26.92317922]), 

76 method="DIN99d", 

77 ), 

78 np.array([45.31204747, 31.42106716, 14.17004652]), 

79 atol=TOLERANCE_ABSOLUTE_TESTS, 

80 ) 

81 

82 def test_n_dimensional_Lab_to_DIN99(self) -> None: 

83 """ 

84 Test :func:`colour.models.din99.Lab_to_DIN99` definition n-dimensional 

85 support. 

86 """ 

87 

88 Lab = np.array([41.52787529, 52.63858304, 26.92317922]) 

89 Lab_99 = Lab_to_DIN99(Lab) 

90 

91 Lab = np.tile(Lab, (6, 1)) 

92 Lab_99 = np.tile(Lab_99, (6, 1)) 

93 np.testing.assert_allclose( 

94 Lab_to_DIN99(Lab), Lab_99, atol=TOLERANCE_ABSOLUTE_TESTS 

95 ) 

96 

97 Lab = np.reshape(Lab, (2, 3, 3)) 

98 Lab_99 = np.reshape(Lab_99, (2, 3, 3)) 

99 np.testing.assert_allclose( 

100 Lab_to_DIN99(Lab), Lab_99, atol=TOLERANCE_ABSOLUTE_TESTS 

101 ) 

102 

103 def test_domain_range_scale_Lab_to_DIN99(self) -> None: 

104 """ 

105 Test :func:`colour.models.din99.Lab_to_DIN99` definition domain and 

106 range scale support. 

107 """ 

108 

109 Lab = np.array([41.52787529, 52.63858304, 26.92317922]) 

110 Lab_99 = Lab_to_DIN99(Lab) 

111 Lab_99_b = Lab_to_DIN99(Lab, method="DIN99b") 

112 Lab_99_c = Lab_to_DIN99(Lab, method="DIN99c") 

113 Lab_99_d = Lab_to_DIN99(Lab, method="DIN99d") 

114 

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

116 for scale, factor in d_r: 

117 with domain_range_scale(scale): 

118 np.testing.assert_allclose( 

119 Lab_to_DIN99(Lab * factor), 

120 Lab_99 * factor, 

121 atol=TOLERANCE_ABSOLUTE_TESTS, 

122 ) 

123 np.testing.assert_allclose( 

124 Lab_to_DIN99((Lab * factor), method="DIN99b"), 

125 Lab_99_b * factor, 

126 atol=TOLERANCE_ABSOLUTE_TESTS, 

127 ) 

128 np.testing.assert_allclose( 

129 Lab_to_DIN99((Lab * factor), method="DIN99c"), 

130 Lab_99_c * factor, 

131 atol=TOLERANCE_ABSOLUTE_TESTS, 

132 ) 

133 np.testing.assert_allclose( 

134 Lab_to_DIN99((Lab * factor), method="DIN99d"), 

135 Lab_99_d * factor, 

136 atol=TOLERANCE_ABSOLUTE_TESTS, 

137 ) 

138 

139 @ignore_numpy_errors 

140 def test_nan_Lab_to_DIN99(self) -> None: 

141 """Test :func:`colour.models.din99.Lab_to_DIN99` definition nan support.""" 

142 

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

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

145 Lab_to_DIN99(cases) 

146 Lab_to_DIN99(cases, method="DIN99b") 

147 Lab_to_DIN99(cases, method="DIN99c") 

148 Lab_to_DIN99(cases, method="DIN99d") 

149 

150 

151class TestDIN99_to_Lab: 

152 """ 

153 Define :func:`colour.models.din99.DIN99_to_Lab` definition unit tests 

154 methods. 

155 """ 

156 

157 def test_DIN99_to_Lab(self) -> None: 

158 """Test :func:`colour.models.din99.DIN99_to_Lab` definition.""" 

159 

160 np.testing.assert_allclose( 

161 DIN99_to_Lab(np.array([53.22821988, 28.41634656, 3.89839552])), 

162 np.array([41.52787529, 52.63858304, 26.92317922]), 

163 atol=TOLERANCE_ABSOLUTE_TESTS, 

164 ) 

165 

166 np.testing.assert_allclose( 

167 DIN99_to_Lab(np.array([66.08943912, -17.35290106, 16.09690691])), 

168 np.array([55.11636304, -41.08791787, 30.91825778]), 

169 atol=TOLERANCE_ABSOLUTE_TESTS, 

170 ) 

171 

172 np.testing.assert_allclose( 

173 DIN99_to_Lab(np.array([40.71533366, 3.48714163, -21.45321411])), 

174 np.array([29.80565520, 20.01830466, -48.34913874]), 

175 atol=TOLERANCE_ABSOLUTE_TESTS, 

176 ) 

177 

178 np.testing.assert_allclose( 

179 DIN99_to_Lab( 

180 np.array([45.58303137, 34.71824493, 17.61622149]), 

181 method="DIN99b", 

182 ), 

183 np.array([41.52787529, 52.63858304, 26.92317922]), 

184 atol=TOLERANCE_ABSOLUTE_TESTS, 

185 ) 

186 

187 np.testing.assert_allclose( 

188 DIN99_to_Lab( 

189 np.array([45.40284208, 32.75074741, 15.74603532]), 

190 method="DIN99c", 

191 ), 

192 np.array([41.52787529, 52.63858304, 26.92317922]), 

193 atol=TOLERANCE_ABSOLUTE_TESTS, 

194 ) 

195 

196 np.testing.assert_allclose( 

197 DIN99_to_Lab( 

198 np.array([45.31204747, 31.42106716, 14.17004652]), 

199 method="DIN99d", 

200 ), 

201 np.array([41.52787529, 52.63858304, 26.92317922]), 

202 atol=TOLERANCE_ABSOLUTE_TESTS, 

203 ) 

204 

205 def test_n_dimensional_DIN99_to_Lab(self) -> None: 

206 """ 

207 Test :func:`colour.models.din99.DIN99_to_Lab` definition n-dimensional 

208 support. 

209 """ 

210 

211 Lab_99 = np.array([53.22821988, 28.41634656, 3.89839552]) 

212 Lab = DIN99_to_Lab(Lab_99) 

213 

214 Lab_99 = np.tile(Lab_99, (6, 1)) 

215 Lab = np.tile(Lab, (6, 1)) 

216 np.testing.assert_allclose( 

217 DIN99_to_Lab(Lab_99), Lab, atol=TOLERANCE_ABSOLUTE_TESTS 

218 ) 

219 

220 Lab_99 = np.reshape(Lab_99, (2, 3, 3)) 

221 Lab = np.reshape(Lab, (2, 3, 3)) 

222 np.testing.assert_allclose( 

223 DIN99_to_Lab(Lab_99), Lab, atol=TOLERANCE_ABSOLUTE_TESTS 

224 ) 

225 

226 def test_domain_range_scale_DIN99_to_Lab(self) -> None: 

227 """ 

228 Test :func:`colour.models.din99.DIN99_to_Lab` definition domain and 

229 range scale support. 

230 """ 

231 

232 Lab_99 = np.array([53.22821988, 28.41634656, 3.89839552]) 

233 Lab = DIN99_to_Lab(Lab_99) 

234 Lab_b = DIN99_to_Lab(Lab_99, method="DIN99b") 

235 Lab_c = DIN99_to_Lab(Lab_99, method="DIN99c") 

236 Lab_d = DIN99_to_Lab(Lab_99, method="DIN99d") 

237 

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

239 for scale, factor in d_r: 

240 with domain_range_scale(scale): 

241 np.testing.assert_allclose( 

242 DIN99_to_Lab(Lab_99 * factor), 

243 Lab * factor, 

244 atol=TOLERANCE_ABSOLUTE_TESTS, 

245 ) 

246 np.testing.assert_allclose( 

247 DIN99_to_Lab((Lab_99 * factor), method="DIN99b"), 

248 Lab_b * factor, 

249 atol=TOLERANCE_ABSOLUTE_TESTS, 

250 ) 

251 np.testing.assert_allclose( 

252 DIN99_to_Lab((Lab_99 * factor), method="DIN99c"), 

253 Lab_c * factor, 

254 atol=TOLERANCE_ABSOLUTE_TESTS, 

255 ) 

256 np.testing.assert_allclose( 

257 DIN99_to_Lab((Lab_99 * factor), method="DIN99d"), 

258 Lab_d * factor, 

259 atol=TOLERANCE_ABSOLUTE_TESTS, 

260 ) 

261 

262 @ignore_numpy_errors 

263 def test_nan_DIN99_to_Lab(self) -> None: 

264 """Test :func:`colour.models.din99.DIN99_to_Lab` definition nan support.""" 

265 

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

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

268 DIN99_to_Lab(cases) 

269 DIN99_to_Lab(cases, method="DIN99b") 

270 DIN99_to_Lab(cases, method="DIN99c") 

271 DIN99_to_Lab(cases, method="DIN99d") 

272 

273 

274class TestXYZ_to_DIN99: 

275 """ 

276 Define :func:`colour.models.din99.XYZ_to_DIN99` definition unit tests 

277 methods. 

278 """ 

279 

280 def test_XYZ_to_DIN99(self) -> None: 

281 """Test :func:`colour.models.din99.XYZ_to_DIN99` definition.""" 

282 

283 np.testing.assert_allclose( 

284 XYZ_to_DIN99(np.array([0.20654008, 0.12197225, 0.05136952])), 

285 np.array([53.22821988, 28.41634656, 3.89839552]), 

286 atol=TOLERANCE_ABSOLUTE_TESTS, 

287 ) 

288 

289 np.testing.assert_allclose( 

290 XYZ_to_DIN99(np.array([0.14222010, 0.23042768, 0.10495772])), 

291 np.array([66.08943912, -17.35290106, 16.09690691]), 

292 atol=TOLERANCE_ABSOLUTE_TESTS, 

293 ) 

294 

295 np.testing.assert_allclose( 

296 XYZ_to_DIN99(np.array([0.07818780, 0.06157201, 0.28099326])), 

297 np.array([40.71533366, 3.48714163, -21.45321411]), 

298 atol=TOLERANCE_ABSOLUTE_TESTS, 

299 ) 

300 

301 np.testing.assert_allclose( 

302 XYZ_to_DIN99( 

303 np.array([0.20654008, 0.12197225, 0.05136952]), method="DIN99b" 

304 ), 

305 np.array([45.58303137, 34.71824493, 17.61622149]), 

306 atol=TOLERANCE_ABSOLUTE_TESTS, 

307 ) 

308 

309 def test_n_dimensional_XYZ_to_DIN99(self) -> None: 

310 """ 

311 Test :func:`colour.models.din99.XYZ_to_DIN99` definition n-dimensional 

312 support. 

313 """ 

314 

315 XYZ = np.array([0.20654008, 0.12197225, 0.05136952]) 

316 Lab_99 = XYZ_to_DIN99(XYZ) 

317 

318 XYZ = np.tile(XYZ, (6, 1)) 

319 Lab_99 = np.tile(Lab_99, (6, 1)) 

320 np.testing.assert_allclose( 

321 XYZ_to_DIN99(XYZ), Lab_99, atol=TOLERANCE_ABSOLUTE_TESTS 

322 ) 

323 

324 XYZ = np.reshape(XYZ, (2, 3, 3)) 

325 Lab_99 = np.reshape(Lab_99, (2, 3, 3)) 

326 np.testing.assert_allclose( 

327 XYZ_to_DIN99(XYZ), Lab_99, atol=TOLERANCE_ABSOLUTE_TESTS 

328 ) 

329 

330 def test_domain_range_scale_XYZ_to_DIN99(self) -> None: 

331 """ 

332 Test :func:`colour.models.din99.XYZ_to_DIN99` definition domain and 

333 range scale support. 

334 """ 

335 

336 XYZ = np.array([0.20654008, 0.12197225, 0.05136952]) 

337 Lab_99 = XYZ_to_DIN99(XYZ) 

338 

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

340 for scale, factor_a, factor_b in d_r: 

341 with domain_range_scale(scale): 

342 np.testing.assert_allclose( 

343 XYZ_to_DIN99(XYZ * factor_a), 

344 Lab_99 * factor_b, 

345 atol=TOLERANCE_ABSOLUTE_TESTS, 

346 ) 

347 

348 @ignore_numpy_errors 

349 def test_nan_XYZ_to_DIN99(self) -> None: 

350 """Test :func:`colour.models.din99.XYZ_to_DIN99` definition nan support.""" 

351 

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

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

354 XYZ_to_DIN99(cases) 

355 

356 

357class TestDIN99_to_XYZ: 

358 """ 

359 Define :func:`colour.models.din99.DIN99_to_XYZ` definition unit tests 

360 methods. 

361 """ 

362 

363 def test_DIN99_to_XYZ(self) -> None: 

364 """Test :func:`colour.models.din99.DIN99_to_XYZ` definition.""" 

365 

366 np.testing.assert_allclose( 

367 DIN99_to_XYZ(np.array([53.22821988, 28.41634656, 3.89839552])), 

368 np.array([0.20654008, 0.12197225, 0.05136952]), 

369 atol=TOLERANCE_ABSOLUTE_TESTS, 

370 ) 

371 

372 np.testing.assert_allclose( 

373 DIN99_to_XYZ(np.array([66.08943912, -17.35290106, 16.09690691])), 

374 np.array([0.14222010, 0.23042768, 0.10495772]), 

375 atol=TOLERANCE_ABSOLUTE_TESTS, 

376 ) 

377 

378 np.testing.assert_allclose( 

379 DIN99_to_XYZ(np.array([40.71533366, 3.48714163, -21.45321411])), 

380 np.array([0.07818780, 0.06157201, 0.28099326]), 

381 atol=TOLERANCE_ABSOLUTE_TESTS, 

382 ) 

383 

384 np.testing.assert_allclose( 

385 DIN99_to_XYZ( 

386 np.array([45.58303137, 34.71824493, 17.61622149]), 

387 method="DIN99b", 

388 ), 

389 np.array([0.20654008, 0.12197225, 0.05136952]), 

390 atol=TOLERANCE_ABSOLUTE_TESTS, 

391 ) 

392 

393 def test_n_dimensional_DIN99_to_XYZ(self) -> None: 

394 """ 

395 Test :func:`colour.models.din99.DIN99_to_XYZ` definition n-dimensional 

396 support. 

397 """ 

398 

399 Lab_99 = np.array([53.22821988, 28.41634656, 3.89839552]) 

400 XYZ = DIN99_to_XYZ(Lab_99) 

401 

402 Lab_99 = np.tile(Lab_99, (6, 1)) 

403 XYZ = np.tile(XYZ, (6, 1)) 

404 np.testing.assert_allclose( 

405 DIN99_to_XYZ(Lab_99), XYZ, atol=TOLERANCE_ABSOLUTE_TESTS 

406 ) 

407 

408 Lab_99 = np.reshape(Lab_99, (2, 3, 3)) 

409 XYZ = np.reshape(XYZ, (2, 3, 3)) 

410 np.testing.assert_allclose( 

411 DIN99_to_XYZ(Lab_99), XYZ, atol=TOLERANCE_ABSOLUTE_TESTS 

412 ) 

413 

414 def test_domain_range_scale_DIN99_to_XYZ(self) -> None: 

415 """ 

416 Test :func:`colour.models.din99.DIN99_to_XYZ` definition domain and 

417 range scale support. 

418 """ 

419 

420 Lab_99 = np.array([53.22821988, 28.41634656, 3.89839552]) 

421 XYZ = DIN99_to_XYZ(Lab_99) 

422 

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

424 for scale, factor_a, factor_b in d_r: 

425 with domain_range_scale(scale): 

426 np.testing.assert_allclose( 

427 DIN99_to_XYZ(Lab_99 * factor_a), 

428 XYZ * factor_b, 

429 atol=TOLERANCE_ABSOLUTE_TESTS, 

430 ) 

431 

432 @ignore_numpy_errors 

433 def test_nan_DIN99_to_XYZ(self) -> None: 

434 """Test :func:`colour.models.din99.DIN99_to_XYZ` definition nan support.""" 

435 

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

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

438 DIN99_to_XYZ(cases)