Coverage for colorimetry/tests/test_whiteness.py: 100%

1"""Define the unit tests for the :mod:`colour.colorimetry.whiteness` module.""" 

2 

3from __future__ import annotations 

4 

5from itertools import product 

6 

7import numpy as np 

8 

9from colour.colorimetry import ( 

10 whiteness_ASTME313, 

11 whiteness_Berger1959, 

12 whiteness_CIE2004, 

13 whiteness_Ganz1979, 

14 whiteness_Stensby1968, 

15 whiteness_Taube1960, 

16) 

17from colour.colorimetry.whiteness import whiteness 

18from colour.constants import TOLERANCE_ABSOLUTE_TESTS 

19from colour.utilities import domain_range_scale, ignore_numpy_errors 

20 

21__author__ = "Colour Developers" 

22__copyright__ = "Copyright 2013 Colour Developers" 

23__license__ = "BSD-3-Clause - https://opensource.org/licenses/BSD-3-Clause" 

24__maintainer__ = "Colour Developers" 

25__email__ = "colour-developers@colour-science.org" 

26__status__ = "Production" 

27 

28__all__ = [ 

29 "TestWhitenessBerger1959", 

30 "TestWhitenessTaube1960", 

31 "TestWhitenessStensby1968", 

32 "TestWhitenessASTM313", 

33 "TestWhitenessGanz1979", 

34 "TestWhitenessCIE2004", 

35 "TestWhiteness", 

36] 

37 

38 

39class TestWhitenessBerger1959: 

40 """ 

41 Define :func:`colour.colorimetry.whiteness.whiteness_Berger1959` 

42 definition unit tests methods. 

43 """ 

44 

45 def test_whiteness_Berger1959(self) -> None: 

46 """ 

47 Test :func:`colour.colorimetry.whiteness.whiteness_Berger1959` 

48 definition. 

49 """ 

50 

51 np.testing.assert_allclose( 

52 whiteness_Berger1959( 

53 np.array([95.00000000, 100.00000000, 105.00000000]), 

54 np.array([94.80966767, 100.00000000, 107.30513595]), 

55 ), 

56 30.36380179, 

57 atol=TOLERANCE_ABSOLUTE_TESTS, 

58 ) 

59 

60 np.testing.assert_allclose( 

61 whiteness_Berger1959( 

62 np.array([105.00000000, 100.00000000, 95.00000000]), 

63 np.array([94.80966767, 100.00000000, 107.30513595]), 

64 ), 

65 5.530469280673941, 

66 atol=TOLERANCE_ABSOLUTE_TESTS, 

67 ) 

68 

69 np.testing.assert_allclose( 

70 whiteness_Berger1959( 

71 np.array([100.00000000, 100.00000000, 100.00000000]), 

72 np.array([100.00000000, 100.00000000, 100.00000000]), 

73 ), 

74 33.300000000000011, 

75 atol=TOLERANCE_ABSOLUTE_TESTS, 

76 ) 

77 

78 def test_n_dimensional_whiteness_Berger1959(self) -> None: 

79 """ 

80 Test :func:`colour.colorimetry.whiteness.whiteness_Berger1959` 

81 definition n_dimensional arrays support. 

82 """ 

83 

84 XYZ = np.array([95.00000000, 100.00000000, 105.00000000]) 

85 XYZ_0 = np.array([94.80966767, 100.00000000, 107.30513595]) 

86 W = whiteness_Berger1959(XYZ, XYZ_0) 

87 

88 XYZ = np.tile(XYZ, (6, 1)) 

89 XYZ_0 = np.tile(XYZ_0, (6, 1)) 

90 W = np.tile(W, 6) 

91 np.testing.assert_allclose( 

92 whiteness_Berger1959(XYZ, XYZ_0), W, atol=TOLERANCE_ABSOLUTE_TESTS 

93 ) 

94 

95 XYZ = np.reshape(XYZ, (2, 3, 3)) 

96 XYZ_0 = np.reshape(XYZ_0, (2, 3, 3)) 

97 W = np.reshape(W, (2, 3)) 

98 np.testing.assert_allclose( 

99 whiteness_Berger1959(XYZ, XYZ_0), W, atol=TOLERANCE_ABSOLUTE_TESTS 

100 ) 

101 

102 def test_domain_range_scale_whiteness_Berger1959(self) -> None: 

103 """ 

104 Test :func:`colour.colorimetry.whiteness.whiteness_Berger1959` 

105 definition domain and range scale support. 

106 """ 

107 

108 XYZ = np.array([95.00000000, 100.00000000, 105.00000000]) 

109 XYZ_0 = np.array([94.80966767, 100.00000000, 107.30513595]) 

110 W = whiteness_Berger1959(XYZ, XYZ_0) 

111 

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

113 for scale, factor in d_r: 

114 with domain_range_scale(scale): 

115 np.testing.assert_allclose( 

116 whiteness_Berger1959(XYZ * factor, XYZ_0 * factor), 

117 W * factor, 

118 atol=TOLERANCE_ABSOLUTE_TESTS, 

119 ) 

120 

121 @ignore_numpy_errors 

122 def test_nan_whiteness_Berger1959(self) -> None: 

123 """ 

124 Test :func:`colour.colorimetry.whiteness.whiteness_Berger1959` 

125 definition nan support. 

126 """ 

127 

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

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

130 whiteness_Berger1959(cases, cases) 

131 

132 

133class TestWhitenessTaube1960: 

134 """ 

135 Define :func:`colour.colorimetry.whiteness.whiteness_Taube1960` 

136 definition unit tests methods. 

137 """ 

138 

139 def test_whiteness_Taube1960(self) -> None: 

140 """ 

141 Test :func:`colour.colorimetry.whiteness.whiteness_Taube1960` 

142 definition. 

143 """ 

144 

145 np.testing.assert_allclose( 

146 whiteness_Taube1960( 

147 np.array([95.00000000, 100.00000000, 105.00000000]), 

148 np.array([94.80966767, 100.00000000, 107.30513595]), 

149 ), 

150 91.407173833416152, 

151 atol=TOLERANCE_ABSOLUTE_TESTS, 

152 ) 

153 

154 np.testing.assert_allclose( 

155 whiteness_Taube1960( 

156 np.array([105.00000000, 100.00000000, 95.00000000]), 

157 np.array([94.80966767, 100.00000000, 107.30513595]), 

158 ), 

159 54.130300134995593, 

160 atol=TOLERANCE_ABSOLUTE_TESTS, 

161 ) 

162 

163 np.testing.assert_allclose( 

164 whiteness_Taube1960( 

165 np.array([100.00000000, 100.00000000, 100.00000000]), 

166 np.array([100.00000000, 100.00000000, 100.00000000]), 

167 ), 

168 100.0, 

169 atol=TOLERANCE_ABSOLUTE_TESTS, 

170 ) 

171 

172 def test_n_dimensional_whiteness_Taube1960(self) -> None: 

173 """ 

174 Test :func:`colour.colorimetry.whiteness.whiteness_Taube1960` 

175 definition n_dimensional arrays support. 

176 """ 

177 

178 XYZ = np.array([95.00000000, 100.00000000, 105.00000000]) 

179 XYZ_0 = np.array([94.80966767, 100.00000000, 107.30513595]) 

180 WI = whiteness_Taube1960(XYZ, XYZ_0) 

181 

182 XYZ = np.tile(XYZ, (6, 1)) 

183 XYZ_0 = np.tile(XYZ_0, (6, 1)) 

184 WI = np.tile(WI, 6) 

185 np.testing.assert_allclose( 

186 whiteness_Taube1960(XYZ, XYZ_0), WI, atol=TOLERANCE_ABSOLUTE_TESTS 

187 ) 

188 

189 XYZ = np.reshape(XYZ, (2, 3, 3)) 

190 XYZ_0 = np.reshape(XYZ_0, (2, 3, 3)) 

191 WI = np.reshape(WI, (2, 3)) 

192 np.testing.assert_allclose( 

193 whiteness_Taube1960(XYZ, XYZ_0), WI, atol=TOLERANCE_ABSOLUTE_TESTS 

194 ) 

195 

196 def test_domain_range_scale_whiteness_Taube1960(self) -> None: 

197 """ 

198 Test :func:`colour.colorimetry.whiteness.whiteness_Taube1960` 

199 definition domain and range scale support. 

200 """ 

201 

202 XYZ = np.array([95.00000000, 100.00000000, 105.00000000]) 

203 XYZ_0 = np.array([94.80966767, 100.00000000, 107.30513595]) 

204 WI = whiteness_Taube1960(XYZ, XYZ_0) 

205 

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

207 for scale, factor in d_r: 

208 with domain_range_scale(scale): 

209 np.testing.assert_allclose( 

210 whiteness_Taube1960(XYZ * factor, XYZ_0 * factor), 

211 WI * factor, 

212 atol=TOLERANCE_ABSOLUTE_TESTS, 

213 ) 

214 

215 @ignore_numpy_errors 

216 def test_nan_whiteness_Berger1959(self) -> None: 

217 """ 

218 Test :func:`colour.colorimetry.whiteness.whiteness_Berger1959` 

219 definition nan support. 

220 """ 

221 

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

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

224 whiteness_Berger1959(cases, cases) 

225 

226 

227class TestWhitenessStensby1968: 

228 """ 

229 Define :func:`colour.colorimetry.whiteness.whiteness_Stensby1968` 

230 definition unit tests methods. 

231 """ 

232 

233 def test_whiteness_Stensby1968(self) -> None: 

234 """ 

235 Test :func:`colour.colorimetry.whiteness.whiteness_Stensby1968` 

236 definition. 

237 """ 

238 

239 np.testing.assert_allclose( 

240 whiteness_Stensby1968(np.array([100.00000000, -2.46875131, -16.72486654])), 

241 142.76834569, 

242 atol=TOLERANCE_ABSOLUTE_TESTS, 

243 ) 

244 

245 np.testing.assert_allclose( 

246 whiteness_Stensby1968(np.array([100.00000000, 14.40943727, -9.61394885])), 

247 172.07015836, 

248 atol=TOLERANCE_ABSOLUTE_TESTS, 

249 ) 

250 

251 np.testing.assert_allclose( 

252 whiteness_Stensby1968(np.array([1, 1, 1])), 

253 1.00000000, 

254 atol=TOLERANCE_ABSOLUTE_TESTS, 

255 ) 

256 

257 def test_n_dimensional_whiteness_Stensby1968(self) -> None: 

258 """ 

259 Test :func:`colour.colorimetry.whiteness.whiteness_Stensby1968` 

260 definition n_dimensional arrays support. 

261 """ 

262 

263 Lab = np.array([100.00000000, -2.46875131, -16.72486654]) 

264 WI = whiteness_Stensby1968(Lab) 

265 

266 Lab = np.tile(Lab, (6, 1)) 

267 WI = np.tile(WI, 6) 

268 np.testing.assert_allclose( 

269 whiteness_Stensby1968(Lab), WI, atol=TOLERANCE_ABSOLUTE_TESTS 

270 ) 

271 

272 Lab = np.reshape(Lab, (2, 3, 3)) 

273 WI = np.reshape(WI, (2, 3)) 

274 np.testing.assert_allclose( 

275 whiteness_Stensby1968(Lab), WI, atol=TOLERANCE_ABSOLUTE_TESTS 

276 ) 

277 

278 def test_domain_range_scale_whiteness_Stensby1968(self) -> None: 

279 """ 

280 Test :func:`colour.colorimetry.whiteness.whiteness_Stensby1968` 

281 definition domain and range scale support. 

282 """ 

283 

284 Lab = np.array([100.00000000, -2.46875131, -16.72486654]) 

285 WI = whiteness_Stensby1968(Lab) 

286 

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

288 for scale, factor in d_r: 

289 with domain_range_scale(scale): 

290 np.testing.assert_allclose( 

291 whiteness_Stensby1968(Lab * factor), 

292 WI * factor, 

293 atol=TOLERANCE_ABSOLUTE_TESTS, 

294 ) 

295 

296 @ignore_numpy_errors 

297 def test_nan_whiteness_Stensby1968(self) -> None: 

298 """ 

299 Test :func:`colour.colorimetry.whiteness.whiteness_Stensby1968` 

300 definition nan support. 

301 """ 

302 

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

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

305 whiteness_Stensby1968(cases) 

306 

307 

308class TestWhitenessASTM313: 

309 """ 

310 Define :func:`colour.colorimetry.whiteness.whiteness_ASTME313` 

311 definition unit tests methods. 

312 """ 

313 

314 def test_whiteness_ASTME313(self) -> None: 

315 """ 

316 Test :func:`colour.colorimetry.whiteness.whiteness_ASTME313` 

317 definition. 

318 """ 

319 

320 np.testing.assert_allclose( 

321 whiteness_ASTME313(np.array([95.00000000, 100.00000000, 105.00000000])), 

322 55.740000000000009, 

323 atol=TOLERANCE_ABSOLUTE_TESTS, 

324 ) 

325 

326 np.testing.assert_allclose( 

327 whiteness_ASTME313(np.array([105.00000000, 100.00000000, 95.00000000])), 

328 21.860000000000014, 

329 atol=TOLERANCE_ABSOLUTE_TESTS, 

330 ) 

331 

332 np.testing.assert_allclose( 

333 whiteness_ASTME313(np.array([100.00000000, 100.00000000, 100.00000000])), 

334 38.800000000000011, 

335 atol=TOLERANCE_ABSOLUTE_TESTS, 

336 ) 

337 

338 def test_n_dimensional_whiteness_ASTME313(self) -> None: 

339 """ 

340 Test :func:`colour.colorimetry.whiteness.whiteness_ASTME313` 

341 definition n_dimensional arrays support. 

342 """ 

343 

344 XYZ = np.array([95.00000000, 100.00000000, 105.00000000]) 

345 WI = whiteness_ASTME313(XYZ) 

346 

347 XYZ = np.tile(XYZ, (6, 1)) 

348 WI = np.tile(WI, 6) 

349 np.testing.assert_allclose( 

350 whiteness_ASTME313(XYZ), WI, atol=TOLERANCE_ABSOLUTE_TESTS 

351 ) 

352 

353 XYZ = np.reshape(XYZ, (2, 3, 3)) 

354 WI = np.reshape(WI, (2, 3)) 

355 np.testing.assert_allclose( 

356 whiteness_ASTME313(XYZ), WI, atol=TOLERANCE_ABSOLUTE_TESTS 

357 ) 

358 

359 def test_domain_range_scale_whiteness_ASTME313(self) -> None: 

360 """ 

361 Test :func:`colour.colorimetry.whiteness.whiteness_ASTME313` 

362 definition domain and range scale support. 

363 """ 

364 

365 XYZ = np.array([95.00000000, 100.00000000, 105.00000000]) 

366 WI = whiteness_ASTME313(XYZ) 

367 

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

369 for scale, factor in d_r: 

370 with domain_range_scale(scale): 

371 np.testing.assert_allclose( 

372 whiteness_ASTME313(XYZ * factor), 

373 WI * factor, 

374 atol=TOLERANCE_ABSOLUTE_TESTS, 

375 ) 

376 

377 @ignore_numpy_errors 

378 def test_nan_whiteness_ASTME313(self) -> None: 

379 """ 

380 Test :func:`colour.colorimetry.whiteness.whiteness_ASTME313` 

381 definition nan support. 

382 """ 

383 

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

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

386 whiteness_ASTME313(cases) 

387 

388 

389class TestWhitenessGanz1979: 

390 """ 

391 Define :func:`colour.colorimetry.whiteness.whiteness_Ganz1979` 

392 definition unit tests methods. 

393 """ 

394 

395 def test_whiteness_Ganz1979(self) -> None: 

396 """ 

397 Test :func:`colour.colorimetry.whiteness.whiteness_Ganz1979` 

398 definition. 

399 """ 

400 

401 np.testing.assert_allclose( 

402 whiteness_Ganz1979(np.array([0.3139, 0.3311]), 100), 

403 np.array([99.33176520, 1.76108290]), 

404 atol=TOLERANCE_ABSOLUTE_TESTS, 

405 ) 

406 

407 np.testing.assert_allclose( 

408 whiteness_Ganz1979(np.array([0.3500, 0.3334]), 100), 

409 np.array([23.38525400, -32.66182560]), 

410 atol=TOLERANCE_ABSOLUTE_TESTS, 

411 ) 

412 

413 np.testing.assert_allclose( 

414 whiteness_Ganz1979(np.array([0.3334, 0.3334]), 100), 

415 np.array([54.39939920, -16.04152380]), 

416 atol=TOLERANCE_ABSOLUTE_TESTS, 

417 ) 

418 

419 def test_n_dimensional_whiteness_Ganz1979(self) -> None: 

420 """ 

421 Test :func:`colour.colorimetry.whiteness.whiteness_Ganz1979` 

422 definition n_dimensional arrays support. 

423 """ 

424 

425 xy = np.array([0.3167, 0.3334]) 

426 Y = 100 

427 WT = whiteness_Ganz1979(xy, Y) 

428 

429 xy = np.tile(xy, (6, 1)) 

430 WT = np.tile(WT, (6, 1)) 

431 np.testing.assert_allclose( 

432 whiteness_Ganz1979(xy, Y), WT, atol=TOLERANCE_ABSOLUTE_TESTS 

433 ) 

434 

435 Y = np.tile(Y, 6) 

436 np.testing.assert_allclose( 

437 whiteness_Ganz1979(xy, Y), WT, atol=TOLERANCE_ABSOLUTE_TESTS 

438 ) 

439 

440 xy = np.reshape(xy, (2, 3, 2)) 

441 Y = np.reshape(Y, (2, 3)) 

442 WT = np.reshape(WT, (2, 3, 2)) 

443 np.testing.assert_allclose( 

444 whiteness_Ganz1979(xy, Y), WT, atol=TOLERANCE_ABSOLUTE_TESTS 

445 ) 

446 

447 def test_domain_range_scale_whiteness_Ganz1979(self) -> None: 

448 """ 

449 Test :func:`colour.colorimetry.whiteness.whiteness_Ganz1979` 

450 definition domain and range scale support. 

451 """ 

452 

453 xy = np.array([0.3167, 0.3334]) 

454 Y = 100 

455 WT = whiteness_Ganz1979(xy, Y) 

456 

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

458 for scale, factor in d_r: 

459 with domain_range_scale(scale): 

460 np.testing.assert_allclose( 

461 whiteness_Ganz1979(xy, Y * factor), 

462 WT * factor, 

463 atol=TOLERANCE_ABSOLUTE_TESTS, 

464 ) 

465 

466 @ignore_numpy_errors 

467 def test_nan_whiteness_Ganz1979(self) -> None: 

468 """ 

469 Test :func:`colour.colorimetry.whiteness.whiteness_Ganz1979` 

470 definition nan support. 

471 """ 

472 

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

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

475 whiteness_Ganz1979(cases[..., 0:2], cases[..., 0]) 

476 

477 

478class TestWhitenessCIE2004: 

479 """ 

480 Define :func:`colour.colorimetry.whiteness.whiteness_CIE2004` 

481 definition unit tests methods. 

482 """ 

483 

484 def test_whiteness_CIE2004(self) -> None: 

485 """ 

486 Test :func:`colour.colorimetry.whiteness.whiteness_CIE2004` 

487 definition. 

488 """ 

489 

490 np.testing.assert_allclose( 

491 whiteness_CIE2004( 

492 np.array([0.3139, 0.3311]), 100, np.array([0.3139, 0.3311]) 

493 ), 

494 np.array([100.00000000, 0.00000000]), 

495 atol=TOLERANCE_ABSOLUTE_TESTS, 

496 ) 

497 

498 np.testing.assert_allclose( 

499 whiteness_CIE2004( 

500 np.array([0.3500, 0.3334]), 100, np.array([0.3139, 0.3311]) 

501 ), 

502 np.array([67.21000000, -34.60500000]), 

503 atol=TOLERANCE_ABSOLUTE_TESTS, 

504 ) 

505 

506 np.testing.assert_allclose( 

507 whiteness_CIE2004( 

508 np.array([0.3334, 0.3334]), 100, np.array([0.3139, 0.3311]) 

509 ), 

510 np.array([80.49000000, -18.00500000]), 

511 atol=TOLERANCE_ABSOLUTE_TESTS, 

512 ) 

513 

514 def test_n_dimensional_whiteness_CIE2004(self) -> None: 

515 """ 

516 Test :func:`colour.colorimetry.whiteness.whiteness_CIE2004` 

517 definition n_dimensional arrays support. 

518 """ 

519 

520 xy = np.array([0.3167, 0.3334]) 

521 Y = 100 

522 xy_n = np.array([0.3139, 0.3311]) 

523 WT = whiteness_CIE2004(xy, Y, xy_n) 

524 

525 xy = np.tile(xy, (6, 1)) 

526 WT = np.tile(WT, (6, 1)) 

527 np.testing.assert_allclose( 

528 whiteness_CIE2004(xy, Y, xy_n), WT, atol=TOLERANCE_ABSOLUTE_TESTS 

529 ) 

530 

531 Y = np.tile(Y, 6) 

532 xy_n = np.tile(xy_n, (6, 1)) 

533 np.testing.assert_allclose( 

534 whiteness_CIE2004(xy, Y, xy_n), WT, atol=TOLERANCE_ABSOLUTE_TESTS 

535 ) 

536 

537 xy = np.reshape(xy, (2, 3, 2)) 

538 Y = np.reshape(Y, (2, 3)) 

539 xy_n = np.reshape(xy_n, (2, 3, 2)) 

540 WT = np.reshape(WT, (2, 3, 2)) 

541 np.testing.assert_allclose( 

542 whiteness_CIE2004(xy, Y, xy_n), WT, atol=TOLERANCE_ABSOLUTE_TESTS 

543 ) 

544 

545 def test_domain_range_scale_whiteness_CIE2004(self) -> None: 

546 """ 

547 Test :func:`colour.colorimetry.whiteness.whiteness_CIE2004` 

548 definition domain and range scale support. 

549 """ 

550 

551 xy = np.array([0.3167, 0.3334]) 

552 Y = 100 

553 xy_n = np.array([0.3139, 0.3311]) 

554 WT = whiteness_CIE2004(xy, Y, xy_n) 

555 

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

557 for scale, factor in d_r: 

558 with domain_range_scale(scale): 

559 np.testing.assert_allclose( 

560 whiteness_CIE2004(xy, Y * factor, xy_n), 

561 WT * factor, 

562 atol=TOLERANCE_ABSOLUTE_TESTS, 

563 ) 

564 

565 @ignore_numpy_errors 

566 def test_nan_whiteness_CIE2004(self) -> None: 

567 """ 

568 Test :func:`colour.colorimetry.whiteness.whiteness_CIE2004` 

569 definition nan support. 

570 """ 

571 

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

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

574 whiteness_CIE2004(cases[..., 0:2], cases[..., 0], cases[..., 0:2]) 

575 

576 

577class TestWhiteness: 

578 """ 

579 Define :func:`colour.colorimetry.whiteness.whiteness` definition unit 

580 tests methods. 

581 """ 

582 

583 def test_domain_range_scale_whiteness(self) -> None: 

584 """ 

585 Test :func:`colour.colorimetry.whiteness.whiteness` definition domain 

586 and range scale support. 

587 """ 

588 

589 XYZ = np.array([95.00000000, 100.00000000, 105.00000000]) 

590 XYZ_0 = np.array([94.80966767, 100.00000000, 107.30513595]) 

591 

592 m = ( 

593 "Berger 1959", 

594 "Taube 1960", 

595 "Stensby 1968", 

596 "ASTM E313", 

597 "Ganz 1979", 

598 "CIE 2004", 

599 ) 

600 v = [whiteness(XYZ, XYZ_0, method) for method in m] 

601 

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

603 for method, value in zip(m, v, strict=True): 

604 for scale, factor in d_r: 

605 with domain_range_scale(scale): 

606 np.testing.assert_allclose( 

607 whiteness(XYZ * factor, XYZ_0 * factor, method), 

608 value * factor, 

609 atol=TOLERANCE_ABSOLUTE_TESTS, 

610 )