d65光源三刺激值怎么計算

? DOHO標(biāo)準(zhǔn)光源箱 ????|???? ?2019-04-03

顏色的產(chǎn)生離不開光源和人,三刺激值是一種表示人體對顏色的感覺刺激程度,那么d65光源三刺激值是多少,今天小編就給大家科普一下光源的三刺激值。

DOHO對色燈箱

什么是三刺激值?

三刺激值是引起人體視網(wǎng)膜對某種顏色感覺的三種原色的刺激程度之量的表示。

三色系統(tǒng)中,與待測光達到顏色匹配所需的三種原色刺激的量。

用X(紅原色刺激量)、Y(綠原色刺激量)和Z(藍原色刺激量)表示。

根據(jù)楊-亥姆霍茲的三原色理論,色的感覺是由于三種原色光刺激的綜合結(jié)果。在紅、綠,藍三原色系統(tǒng)中,紅。綠、藍的刺激量分別以R、G、B表示之。由于從實際光譜中選定的紅、綠、藍三原色光不可能調(diào)(匹)配出存在于自然界的所有色彩,所以,CIE于1931年從理論上假設(shè)了并不存在于自然界的三種原色,即理論三原色,以X,Y,Z表示,以期從理論上來調(diào)(匹)配一切色彩。

D65光源三刺激值怎么算?

光譜儀可以測出RGB的光譜分布

然后將光譜分布加權(quán)對應(yīng)波長的標(biāo)準(zhǔn)光譜三刺激值(常數(shù))就是對應(yīng)的RGB光譜三刺激值。

三刺激值可通過下列測定而計算之:

1.物體在可見光譜中正常間隔情況下的反射率(或透射率),并乘以這些量度;

2.理論照度中同樣波長的相應(yīng)能量;

3.同樣波長的每一個的三色調(diào)(匹)配函數(shù);

4.每三套產(chǎn)物的總和,以這種方法得到的三刺激值叫重量縱坐標(biāo)法。測定三刺激值的方法還有一種叫選擇縱坐標(biāo)法,即在特別選擇的波長條件下測定反射(或透射)率的方法。

CIE色度學(xué)除V(λ)函數(shù),X(λ)和Z(λ)函數(shù),協(xié)調(diào)光譜中紅色,綠色和藍色的平均值,γ(λ)函數(shù)定義Y(λ),三函數(shù)如下,這些函數(shù)線下的面積是相等的,因此,X、Y和Z對色刺激SE等于光譜功率值/一定波長間隔(等能刺激)。

d65光譜表:

l,?mn

Standard Illuminant A

Standard Illuminant D65

Illuminant C

Illuminant D50

Illuminant D55

Illuminant D75

300

0,930 483

0,034 100 0

0,00

0,019

0,024

0,043

305

1,128 21

1,664 30

0,00

1,035

1,048

2,588

310

1,357 69

3,294 50

0,00

2,051

2,072

5,133

315

1,622 19

11,765 2

0,00

4,914

6,648

17,470

320

1,925 08

20,236 0

0,01

7,778

11,224

29,808

325

2,269 80

28,644 7

0,20

11,263

15,936

42,369

330

2,659 81

37,053 5

0,40

14,748

20,647

54,930

335

3,098 61

38,501 1

1,55

16,348

22,266

56,095

340

3,589 68

39,948 8

2,70

17,948

23,885

57,259

345

4,136 48

42,430 2

4,85

19,479

25,851

60,000

350

4,742 38

44,911 7

7,00

21,010

27,817

62,740

355

5,410 70

45,775 0

9,95

22,476

29,219

62,861

360

6,144 62

46,638 3

12,90

23,942

30,621

62,982

365

6,947 20

49,363 7

17,20

25,451

32,464

66,647

370

7,821 35

52,089 1

21,40

26,961

34,308

70,312

375

8,769 80

51,032 3

27,50

25,724

33,446

68,507

380

9,795 10

49,975 5

33,00

24,488

32,584

66,703

385

10,899 6

52,311 8

39,92

27,179

35,335

68,333

390

12,085 3

54,648 2

47,40

29,871

38,087

69,963

395

13,354 3

68,701 5

55,17

39,589

49,518

85,946

400

14,708 0

82,754 9

63,30

49,308

60,949

101,929

405

16,148 0

87,120 4

71,81

52,910

64,751

106,911

410

17,675 3

91,486 0

80,60

56,513

68,554

111,894

415

19,290 7

92,458 9

89,53

58,273

70,065

112,346

420

20,995 0

93,431 8

98,10

60,034

71,577

112,798

425

22,788 3

90,057 0

105,80

58,926

69,746

107,945

430

24,670 9

86,682 3

112,40

57,818

67,914

103,092

435

26,642 5

95,773 6

117,75

66,321

76,760

112,145

440

28,702 7

104,865

121,50

74,825

85,605

121,198

445

30,850 8

110,936

123,45

81,036

91,799

127,104

450

33,085 9

117,008

124,00

87,247

97,993

133,010

455

35,406 8

117,410

123,60

88,930

99,228

132,682

460

37,812 1

117,812

123,10

90,612

100,463

132,355

465

40,300 2

116,336

123,30

90,990

100,188

129,838

470

42,869 3

114,861

123,80

91,368

99,913

127,322

475

45,517 4

115,392

124,09

93,238

101,326

127,061

480

48,242 3

115,923

123,90

95,109

102,739

126,800

485

51,041 8

112,367

122,92

93,536

100,409

122,291

490

53,913 2

108,811

120,70

91,963

98,078

117,783

495

56,853 9

109,082

116,90

93,843

99,379

117,186

500

59,861 1

109,354

112,10

95,724

100,680

116,589

505

62,932 0

108,578

106,98

96,169

100,688

115,146

510

66,063 5

107,802

102,30

96,613

100,695

113,702

515

69,252 5

106,296

98,81

96,871

100,341

111,181

520

72,495 9

104,790

96,90

97,129

99,987

108,659

525

75,790 3

106,239

96,78

99,614

102,098

109,552

530

79,132 6

107,689

98,00

102,099

104,210

110,445

535

82,519 3

106,047

99,94

101,427

103,156

108,367

540

85,947 0

104,405

102,10

100,755

102,102

106,289

545

89,412 4

104,225

103,95

101,536

102,535

105,596

550

92,912 0

104,046

105,20

102,317

102,968

104,904

555

96,442 3

102,023

105,67

101,159

101,484

102,452

560

100,000

100,000

105,30

100,000

100,000

100,000

565

103,582

98,167 1

104,11

98,868

98,608

97,808

570

107,184

96,334 2

102,30

97,735

97,216

95,616

575

110,803

96,061 1

100,15

98,327

97,482

94,914

580

114,436

95,788 0

97,80

98,918

97,749

94,213

585

118,080

92,236 8

95,43

96,208

94,590

90,605

590

121,731

88,685 6

93,20

93,499

91,432

86,997

595

125,386

89,345 9

91,22

95,593

92,926

87,112

600

129,043

90,006 2

89,70

97,688

94,419

87,227

605

132,697

89,802 6

88,83

98,478

94,780

86,684

610

136,346

89,599 1

88,40

99,269

95,140

86,140

615

139,988

88,648 9

88,19

99,155

94,680

84,861

620

143,618

87,698 7

88,10

99,042

94,220

83,581

625

147,235

85,493 6

88,06

97,382

92,334

81,164

630

150,836

83,288 6

88,00

95,722

90,448

78,747

635

154,418

83,493 9

87,86

97,290

91,389

78,587

640

157,979

83,699 2

87,80

98,857

92,330

78,428

645

161,516

81,863 0

87,99

97,262

90,592

76,614

650

165,028

80,026 8

88,20

95,667

88,854

74,801

655

168,510

80,120 7

88,20

96,929

89,586

74,562

660

171,963

80,214 6

87,90

98,190

90,317

74,324

665

175,383

81,246 2

87,22

100,597

92,133

74,873

670

178,769

82,277 8

86,30

103,003

93,950

75,422

675

182,118

80,281 0

85,30

101,068

91,953

73,499

680

185,429

78,284 2

84,00

99,133

89,956

71,576

685

188,701

74,002 7

82,21

93,257

84,817

67,714

690

191,931

69,721 3

80,20

87,381

79,677

63,852

695

195,118

70,665 2

78,24

89,492

81,258

64,464

700

198,261

71,609 1

76,30

91,604

82,840

65,076

705

201,359

72,979 0

74,36

92,246

83,842

66,573

710

204,409

74,349 0

72,40

92,889

84,844

68,070

715

207,411

67,976 5

70,40

84,872

77,539

62,256

720

210,365

61,604 0

68,30

76,854

70,235

56,443

725

213,268

65,744 8

66,30

81,683

74,768

60,343

730

216,120

69,885 6

64,40

86,511

79,301

64,242

735

218,920

72,486 3

62,80

89,546

82,147

66,697

740

221,667

75,087 0

61,50

92,580

84,993

69,151

745

224,361

69,339 8

60,20

85,405

78,437

63,890

750

227,000

63,592 7

59,20

78,230

71,880

58,629

755

229,585

55,005 4

58,50

67,961

62,337

50,623

760

232,115

46,418 2

58,10

57,692

52,793

42,617

765

234,589

56,611 8

58,00

70,307

64,360

51,985

770

237,008

66,805 4

58,20

82,923

75,927

61,352

775

239,370

65,094 1

58,50

80,599

73,872

59,838

780

241,675

63,382 8

59,10

78,274

71,818

58,324

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以上就是小編搜集整理的d65光源三刺激值相關(guān)內(nèi)容,想了解更多光源知識的朋友,可以繼續(xù)關(guān)注我們的后續(xù)更新!