colour.mesopic_luminous_efficiency_function

colour.mesopic_luminous_efficiency_function(Lp, source=u'Blue Heavy', method=u'MOVE', photopic_lef=SpectralPowerDistribution(name='CIE 1924 Photopic Standard Observer', ...), scotopic_lef=SpectralPowerDistribution(name='CIE 1951 Scotopic Standard Observer', ...))[source]

Returns the mesopic luminous efficiency function \(V_m(\lambda)\) for given photopic luminance \(L_p\).

Parameters:
  • Lp (numeric) – Photopic luminance \(L_p\).
  • source (unicode, optional) – {‘Blue Heavy’, ‘Red Heavy’}, Light source colour temperature.
  • method (unicode, optional) – {‘MOVE’, ‘LRC’}, Method to calculate the weighting factor.
  • photopic_lef (SpectralPowerDistribution, optional) – \(V(\lambda)\) photopic luminous efficiency function.
  • scotopic_lef (SpectralPowerDistribution, optional) – \(V^\prime(\lambda)\) scotopic luminous efficiency function.
Returns:

Mesopic luminous efficiency function \(V_m(\lambda)\).

Return type:

SpectralPowerDistribution

References

Examples

>>> from colour.utilities import numpy_print_options
>>> with numpy_print_options(suppress=True):
...     mesopic_luminous_efficiency_function(0.2)  
SpectralPowerDistribution([[ 380.        ,    0.000424 ...],
                           [ 381.        ,    0.0004781...],
                           [ 382.        ,    0.0005399...],
                           [ 383.        ,    0.0006122...],
                           [ 384.        ,    0.0006961...],
                           [ 385.        ,    0.0007929...],
                           [ 386.        ,    0.000907 ...],
                           [ 387.        ,    0.0010389...],
                           [ 388.        ,    0.0011923...],
                           [ 389.        ,    0.0013703...],
                           [ 390.        ,    0.0015771...],
                           [ 391.        ,    0.0018167...],
                           [ 392.        ,    0.0020942...],
                           [ 393.        ,    0.0024160...],
                           [ 394.        ,    0.0027888...],
                           [ 395.        ,    0.0032196...],
                           [ 396.        ,    0.0037222...],
                           [ 397.        ,    0.0042957...],
                           [ 398.        ,    0.0049531...],
                           [ 399.        ,    0.0057143...],
                           [ 400.        ,    0.0065784...],
                           [ 401.        ,    0.0075658...],
                           [ 402.        ,    0.0086912...],
                           [ 403.        ,    0.0099638...],
                           [ 404.        ,    0.0114058...],
                           [ 405.        ,    0.0130401...],
                           [ 406.        ,    0.0148750...],
                           [ 407.        ,    0.0169310...],
                           [ 408.        ,    0.0192211...],
                           [ 409.        ,    0.0217511...],
                           [ 410.        ,    0.0245342...],
                           [ 411.        ,    0.0275773...],
                           [ 412.        ,    0.0309172...],
                           [ 413.        ,    0.0345149...],
                           [ 414.        ,    0.0383998...],
                           [ 415.        ,    0.0425744...],
                           [ 416.        ,    0.0471074...],
                           [ 417.        ,    0.0519322...],
                           [ 418.        ,    0.0570541...],
                           [ 419.        ,    0.0625466...],
                           [ 420.        ,    0.0683463...],
                           [ 421.        ,    0.0745255...],
                           [ 422.        ,    0.0809440...],
                           [ 423.        ,    0.0877344...],
                           [ 424.        ,    0.0948915...],
                           [ 425.        ,    0.1022731...],
                           [ 426.        ,    0.109877 ...],
                           [ 427.        ,    0.1178421...],
                           [ 428.        ,    0.1260316...],
                           [ 429.        ,    0.1343772...],
                           [ 430.        ,    0.143017 ...],
                           [ 431.        ,    0.1518128...],
                           [ 432.        ,    0.1608328...],
                           [ 433.        ,    0.1700088...],
                           [ 434.        ,    0.1792726...],
                           [ 435.        ,    0.1886934...],
                           [ 436.        ,    0.1982041...],
                           [ 437.        ,    0.2078032...],
                           [ 438.        ,    0.2174184...],
                           [ 439.        ,    0.2271147...],
                           [ 440.        ,    0.2368196...],
                           [ 441.        ,    0.2464623...],
                           [ 442.        ,    0.2561153...],
                           [ 443.        ,    0.2657160...],
                           [ 444.        ,    0.2753387...],
                           [ 445.        ,    0.2848520...],
                           [ 446.        ,    0.2944648...],
                           [ 447.        ,    0.3034902...],
                           [ 448.        ,    0.3132347...],
                           [ 449.        ,    0.3223257...],
                           [ 450.        ,    0.3314513...],
                           [ 451.        ,    0.3406129...],
                           [ 452.        ,    0.3498117...],
                           [ 453.        ,    0.3583617...],
                           [ 454.        ,    0.3676377...],
                           [ 455.        ,    0.3762670...],
                           [ 456.        ,    0.3849392...],
                           [ 457.        ,    0.3936540...],
                           [ 458.        ,    0.4024077...],
                           [ 459.        ,    0.4111965...],
                           [ 460.        ,    0.4193298...],
                           [ 461.        ,    0.4281803...],
                           [ 462.        ,    0.4363804...],
                           [ 463.        ,    0.4453117...],
                           [ 464.        ,    0.4542949...],
                           [ 465.        ,    0.4626509...],
                           [ 466.        ,    0.4717570...],
                           [ 467.        ,    0.4809300...],
                           [ 468.        ,    0.4901776...],
                           [ 469.        ,    0.4995075...],
                           [ 470.        ,    0.5096145...],
                           [ 471.        ,    0.5191293...],
                           [ 472.        ,    0.5294259...],
                           [ 473.        ,    0.5391316...],
                           [ 474.        ,    0.5496217...],
                           [ 475.        ,    0.5602103...],
                           [ 476.        ,    0.5702197...],
                           [ 477.        ,    0.5810207...],
                           [ 478.        ,    0.5919093...],
                           [ 479.        ,    0.6028683...],
                           [ 480.        ,    0.6138806...],
                           [ 481.        ,    0.6249373...],
                           [ 482.        ,    0.6360619...],
                           [ 483.        ,    0.6465989...],
                           [ 484.        ,    0.6579538...],
                           [ 485.        ,    0.6687841...],
                           [ 486.        ,    0.6797939...],
                           [ 487.        ,    0.6909887...],
                           [ 488.        ,    0.7023827...],
                           [ 489.        ,    0.7133032...],
                           [ 490.        ,    0.7244513...],
                           [ 491.        ,    0.7358470...],
                           [ 492.        ,    0.7468118...],
                           [ 493.        ,    0.7580294...],
                           [ 494.        ,    0.7694964...],
                           [ 495.        ,    0.7805225...],
                           [ 496.        ,    0.7917805...],
                           [ 497.        ,    0.8026123...],
                           [ 498.        ,    0.8130793...],
                           [ 499.        ,    0.8239297...],
                           [ 500.        ,    0.8352251...],
                           [ 501.        ,    0.8456342...],
                           [ 502.        ,    0.8564818...],
                           [ 503.        ,    0.8676921...],
                           [ 504.        ,    0.8785021...],
                           [ 505.        ,    0.8881489...],
                           [ 506.        ,    0.8986405...],
                           [ 507.        ,    0.9079322...],
                           [ 508.        ,    0.9174255...],
                           [ 509.        ,    0.9257739...],
                           [ 510.        ,    0.9350656...],
                           [ 511.        ,    0.9432365...],
                           [ 512.        ,    0.9509063...],
                           [ 513.        ,    0.9586931...],
                           [ 514.        ,    0.9658413...],
                           [ 515.        ,    0.9722825...],
                           [ 516.        ,    0.9779924...],
                           [ 517.        ,    0.9836106...],
                           [ 518.        ,    0.9883465...],
                           [ 519.        ,    0.9920964...],
                           [ 520.        ,    0.9954436...],
                           [ 521.        ,    0.9976202...],
                           [ 522.        ,    0.9993457...],
                           [ 523.        ,    1.       ...],
                           [ 524.        ,    0.9996498...],
                           [ 525.        ,    0.9990487...],
                           [ 526.        ,    0.9975356...],
                           [ 527.        ,    0.9957615...],
                           [ 528.        ,    0.9930143...],
                           [ 529.        ,    0.9899559...],
                           [ 530.        ,    0.9858741...],
                           [ 531.        ,    0.9814453...],
                           [ 532.        ,    0.9766885...],
                           [ 533.        ,    0.9709363...],
                           [ 534.        ,    0.9648947...],
                           [ 535.        ,    0.9585832...],
                           [ 536.        ,    0.952012 ...],
                           [ 537.        ,    0.9444916...],
                           [ 538.        ,    0.9367089...],
                           [ 539.        ,    0.9293506...],
                           [ 540.        ,    0.9210429...],
                           [ 541.        ,    0.9124772...],
                           [ 542.        ,    0.9036604...],
                           [ 543.        ,    0.8945958...],
                           [ 544.        ,    0.8845999...],
                           [ 545.        ,    0.8750500...],
                           [ 546.        ,    0.8659457...],
                           [ 547.        ,    0.8559224...],
                           [ 548.        ,    0.8456846...],
                           [ 549.        ,    0.8352499...],
                           [ 550.        ,    0.8253229...],
                           [ 551.        ,    0.8152079...],
                           [ 552.        ,    0.8042205...],
                           [ 553.        ,    0.7944209...],
                           [ 554.        ,    0.7837466...],
                           [ 555.        ,    0.7735680...],
                           [ 556.        ,    0.7627808...],
                           [ 557.        ,    0.7522710...],
                           [ 558.        ,    0.7417549...],
                           [ 559.        ,    0.7312909...],
                           [ 560.        ,    0.7207983...],
                           [ 561.        ,    0.7101939...],
                           [ 562.        ,    0.6996362...],
                           [ 563.        ,    0.6890656...],
                           [ 564.        ,    0.6785599...],
                           [ 565.        ,    0.6680593...],
                           [ 566.        ,    0.6575697...],
                           [ 567.        ,    0.6471578...],
                           [ 568.        ,    0.6368208...],
                           [ 569.        ,    0.6264871...],
                           [ 570.        ,    0.6161541...],
                           [ 571.        ,    0.6058896...],
                           [ 572.        ,    0.5957000...],
                           [ 573.        ,    0.5855937...],
                           [ 574.        ,    0.5754412...],
                           [ 575.        ,    0.5653883...],
                           [ 576.        ,    0.5553742...],
                           [ 577.        ,    0.5454680...],
                           [ 578.        ,    0.5355972...],
                           [ 579.        ,    0.5258267...],
                           [ 580.        ,    0.5160152...],
                           [ 581.        ,    0.5062322...],
                           [ 582.        ,    0.4965595...],
                           [ 583.        ,    0.4868746...],
                           [ 584.        ,    0.4773299...],
                           [ 585.        ,    0.4678028...],
                           [ 586.        ,    0.4583704...],
                           [ 587.        ,    0.4489722...],
                           [ 588.        ,    0.4397606...],
                           [ 589.        ,    0.4306131...],
                           [ 590.        ,    0.4215446...],
                           [ 591.        ,    0.4125681...],
                           [ 592.        ,    0.4037550...],
                           [ 593.        ,    0.3950359...],
                           [ 594.        ,    0.3864104...],
                           [ 595.        ,    0.3778777...],
                           [ 596.        ,    0.3694405...],
                           [ 597.        ,    0.3611074...],
                           [ 598.        ,    0.3528596...],
                           [ 599.        ,    0.3447056...],
                           [ 600.        ,    0.3366470...],
                           [ 601.        ,    0.3286917...],
                           [ 602.        ,    0.3208410...],
                           [ 603.        ,    0.3130808...],
                           [ 604.        ,    0.3054105...],
                           [ 605.        ,    0.2978225...],
                           [ 606.        ,    0.2903027...],
                           [ 607.        ,    0.2828727...],
                           [ 608.        ,    0.2755311...],
                           [ 609.        ,    0.2682900...],
                           [ 610.        ,    0.2611478...],
                           [ 611.        ,    0.2541176...],
                           [ 612.        ,    0.2471885...],
                           [ 613.        ,    0.2403570...],
                           [ 614.        ,    0.2336057...],
                           [ 615.        ,    0.2269379...],
                           [ 616.        ,    0.2203527...],
                           [ 617.        ,    0.2138465...],
                           [ 618.        ,    0.2073946...],
                           [ 619.        ,    0.2009789...],
                           [ 620.        ,    0.1945818...],
                           [ 621.        ,    0.1881943...],
                           [ 622.        ,    0.1818226...],
                           [ 623.        ,    0.1754987...],
                           [ 624.        ,    0.1692476...],
                           [ 625.        ,    0.1630876...],
                           [ 626.        ,    0.1570257...],
                           [ 627.        ,    0.151071 ...],
                           [ 628.        ,    0.1452469...],
                           [ 629.        ,    0.1395845...],
                           [ 630.        ,    0.1341087...],
                           [ 631.        ,    0.1288408...],
                           [ 632.        ,    0.1237666...],
                           [ 633.        ,    0.1188631...],
                           [ 634.        ,    0.1141075...],
                           [ 635.        ,    0.1094766...],
                           [ 636.        ,    0.1049613...],
                           [ 637.        ,    0.1005679...],
                           [ 638.        ,    0.0962924...],
                           [ 639.        ,    0.0921296...],
                           [ 640.        ,    0.0880778...],
                           [ 641.        ,    0.0841306...],
                           [ 642.        ,    0.0802887...],
                           [ 643.        ,    0.0765559...],
                           [ 644.        ,    0.0729367...],
                           [ 645.        ,    0.0694345...],
                           [ 646.        ,    0.0660491...],
                           [ 647.        ,    0.0627792...],
                           [ 648.        ,    0.0596278...],
                           [ 649.        ,    0.0565970...],
                           [ 650.        ,    0.0536896...],
                           [ 651.        ,    0.0509068...],
                           [ 652.        ,    0.0482444...],
                           [ 653.        ,    0.0456951...],
                           [ 654.        ,    0.0432510...],
                           [ 655.        ,    0.0409052...],
                           [ 656.        ,    0.0386537...],
                           [ 657.        ,    0.0364955...],
                           [ 658.        ,    0.0344285...],
                           [ 659.        ,    0.0324501...],
                           [ 660.        ,    0.0305579...],
                           [ 661.        ,    0.0287496...],
                           [ 662.        ,    0.0270233...],
                           [ 663.        ,    0.0253776...],
                           [ 664.        ,    0.0238113...],
                           [ 665.        ,    0.0223226...],
                           [ 666.        ,    0.0209086...],
                           [ 667.        ,    0.0195688...],
                           [ 668.        ,    0.0183056...],
                           [ 669.        ,    0.0171216...],
                           [ 670.        ,    0.0160192...],
                           [ 671.        ,    0.0149986...],
                           [ 672.        ,    0.0140537...],
                           [ 673.        ,    0.0131784...],
                           [ 674.        ,    0.0123662...],
                           [ 675.        ,    0.0116107...],
                           [ 676.        ,    0.0109098...],
                           [ 677.        ,    0.0102587...],
                           [ 678.        ,    0.0096476...],
                           [ 679.        ,    0.0090665...],
                           [ 680.        ,    0.0085053...],
                           [ 681.        ,    0.0079567...],
                           [ 682.        ,    0.0074229...],
                           [ 683.        ,    0.0069094...],
                           [ 684.        ,    0.0064213...],
                           [ 685.        ,    0.0059637...],
                           [ 686.        ,    0.0055377...],
                           [ 687.        ,    0.0051402...],
                           [ 688.        ,    0.00477  ...],
                           [ 689.        ,    0.0044263...],
                           [ 690.        ,    0.0041081...],
                           [ 691.        ,    0.0038149...],
                           [ 692.        ,    0.0035456...],
                           [ 693.        ,    0.0032984...],
                           [ 694.        ,    0.0030718...],
                           [ 695.        ,    0.0028639...],
                           [ 696.        ,    0.0026738...],
                           [ 697.        ,    0.0025000...],
                           [ 698.        ,    0.0023401...],
                           [ 699.        ,    0.0021918...],
                           [ 700.        ,    0.0020526...],
                           [ 701.        ,    0.0019207...],
                           [ 702.        ,    0.001796 ...],
                           [ 703.        ,    0.0016784...],
                           [ 704.        ,    0.0015683...],
                           [ 705.        ,    0.0014657...],
                           [ 706.        ,    0.0013702...],
                           [ 707.        ,    0.001281 ...],
                           [ 708.        ,    0.0011976...],
                           [ 709.        ,    0.0011195...],
                           [ 710.        ,    0.0010464...],
                           [ 711.        ,    0.0009776...],
                           [ 712.        ,    0.0009131...],
                           [ 713.        ,    0.0008525...],
                           [ 714.        ,    0.0007958...],
                           [ 715.        ,    0.0007427...],
                           [ 716.        ,    0.0006929...],
                           [ 717.        ,    0.0006462...],
                           [ 718.        ,    0.0006026...],
                           [ 719.        ,    0.0005619...],
                           [ 720.        ,    0.0005240...],
                           [ 721.        ,    0.0004888...],
                           [ 722.        ,    0.0004561...],
                           [ 723.        ,    0.0004255...],
                           [ 724.        ,    0.0003971...],
                           [ 725.        ,    0.0003704...],
                           [ 726.        ,    0.0003455...],
                           [ 727.        ,    0.0003221...],
                           [ 728.        ,    0.0003001...],
                           [ 729.        ,    0.0002796...],
                           [ 730.        ,    0.0002604...],
                           [ 731.        ,    0.0002423...],
                           [ 732.        ,    0.0002254...],
                           [ 733.        ,    0.0002095...],
                           [ 734.        ,    0.0001947...],
                           [ 735.        ,    0.0001809...],
                           [ 736.        ,    0.0001680...],
                           [ 737.        ,    0.0001560...],
                           [ 738.        ,    0.0001449...],
                           [ 739.        ,    0.0001345...],
                           [ 740.        ,    0.0001249...],
                           [ 741.        ,    0.0001159...],
                           [ 742.        ,    0.0001076...],
                           [ 743.        ,    0.0000999...],
                           [ 744.        ,    0.0000927...],
                           [ 745.        ,    0.0000862...],
                           [ 746.        ,    0.0000801...],
                           [ 747.        ,    0.0000745...],
                           [ 748.        ,    0.0000693...],
                           [ 749.        ,    0.0000646...],
                           [ 750.        ,    0.0000602...],
                           [ 751.        ,    0.0000561...],
                           [ 752.        ,    0.0000523...],
                           [ 753.        ,    0.0000488...],
                           [ 754.        ,    0.0000456...],
                           [ 755.        ,    0.0000425...],
                           [ 756.        ,    0.0000397...],
                           [ 757.        ,    0.0000370...],
                           [ 758.        ,    0.0000346...],
                           [ 759.        ,    0.0000322...],
                           [ 760.        ,    0.0000301...],
                           [ 761.        ,    0.0000281...],
                           [ 762.        ,    0.0000262...],
                           [ 763.        ,    0.0000244...],
                           [ 764.        ,    0.0000228...],
                           [ 765.        ,    0.0000213...],
                           [ 766.        ,    0.0000198...],
                           [ 767.        ,    0.0000185...],
                           [ 768.        ,    0.0000173...],
                           [ 769.        ,    0.0000161...],
                           [ 770.        ,    0.0000150...],
                           [ 771.        ,    0.0000140...],
                           [ 772.        ,    0.0000131...],
                           [ 773.        ,    0.0000122...],
                           [ 774.        ,    0.0000114...],
                           [ 775.        ,    0.0000106...],
                           [ 776.        ,    0.0000099...],
                           [ 777.        ,    0.0000092...],
                           [ 778.        ,    0.0000086...],
                           [ 779.        ,    0.0000080...],
                           [ 780.        ,    0.0000075...]],
                          interpolator=SpragueInterpolator,
                          interpolator_args={},
                          extrapolator=Extrapolator,
                          extrapolator_args={...})