colour.sd_mesopic_luminous_efficiency_function

colour.sd_mesopic_luminous_efficiency_function(Lp, source='Blue Heavy', method='MOVE', photopic_lef=SpectralDistribution(name='CIE 1924 Photopic Standard Observer', ...), scotopic_lef=SpectralDistribution(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 (SpectralDistribution, optional) – \(V(\lambda)\) photopic luminous efficiency function.
  • scotopic_lef (SpectralDistribution, optional) – \(V^\prime(\lambda)\) scotopic luminous efficiency function.
Returns:

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

Return type:

SpectralDistribution

References

[Wikipedia2005d]

Examples

>>> from colour.utilities import numpy_print_options
>>> with numpy_print_options(suppress=True):
...     sd_mesopic_luminous_efficiency_function(0.2)  # doctest: +ELLIPSIS
SpectralDistribution([[ 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...],
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                      [ 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...],
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                      [ 664.        ,    0.0238113...],
                      [ 665.        ,    0.0223226...],
                      [ 666.        ,    0.0209086...],
                      [ 667.        ,    0.0195688...],
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                      [ 669.        ,    0.0171216...],
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                      [ 671.        ,    0.0149986...],
                      [ 672.        ,    0.0140537...],
                      [ 673.        ,    0.0131784...],
                      [ 674.        ,    0.0123662...],
                      [ 675.        ,    0.0116107...],
                      [ 676.        ,    0.0109098...],
                      [ 677.        ,    0.0102587...],
                      [ 678.        ,    0.0096476...],
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                      [ 688.        ,    0.00477  ...],
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                      [ 693.        ,    0.0032984...],
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                      [ 696.        ,    0.0026738...],
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                      [ 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...],
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                      [ 711.        ,    0.0009776...],
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                      [ 713.        ,    0.0008525...],
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                      [ 720.        ,    0.0005240...],
                      [ 721.        ,    0.0004888...],
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                      [ 777.        ,    0.0000092...],
                      [ 778.        ,    0.0000086...],
                      [ 779.        ,    0.0000080...],
                      [ 780.        ,    0.0000075...]],
                     interpolator=SpragueInterpolator,
                     interpolator_args={},
                     extrapolator=Extrapolator,
                     extrapolator_args={...})