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d65.m
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d65.m
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% ***********************************************************************
% d65.m
% ***********************************************************************
%
% Data description:
% Relative spectral power distribution of a D65 illuminant
%
% Prepared by: T. Francis Chen on April 2015
%
% ***********************************************************************
%
% Original data source:
% R. W. G. Hunt. Measuring Colour, 2nd ed.
% Ellis Horwood Limited, Chichester, 1991.
%
% ***********************************************************************
data = [ ...
300, 0.034100
301, 0.360140
302, 0.686180
303, 1.012220
304, 1.338260
305, 1.664300
306, 1.990340
307, 2.316380
308, 2.642420
309, 2.968460
310, 3.294500
311, 4.988650
312, 6.682800
313, 8.376950
314, 10.071100
315, 11.765200
316, 13.459400
317, 15.153500
318, 16.847700
319, 18.541800
320, 20.236000
321, 21.917700
322, 23.599500
323, 25.281200
324, 26.963000
325, 28.644700
326, 30.326500
327, 32.008200
328, 33.690000
329, 35.371700
330, 37.053500
331, 37.343000
332, 37.632600
333, 37.922100
334, 38.211600
335, 38.501100
336, 38.790700
337, 39.080200
338, 39.369700
339, 39.659300
340, 39.948800
341, 40.445100
342, 40.941400
343, 41.437700
344, 41.934000
345, 42.430200
346, 42.926500
347, 43.422800
348, 43.919100
349, 44.415400
350, 44.911700
351, 45.084400
352, 45.257000
353, 45.429700
354, 45.602300
355, 45.775000
356, 45.947700
357, 46.120300
358, 46.293000
359, 46.465600
360, 46.638300
361, 47.183400
362, 47.728500
363, 48.273500
364, 48.818600
365, 49.363700
366, 49.908800
367, 50.453900
368, 50.998900
369, 51.544000
370, 52.089100
371, 51.877700
372, 51.666400
373, 51.455000
374, 51.243700
375, 51.032300
376, 50.820900
377, 50.609600
378, 50.398200
379, 50.186900
380, 49.975500
381, 50.442800
382, 50.910000
383, 51.377300
384, 51.844600
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386, 52.779100
387, 53.246400
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389, 54.180900
390, 54.648200
391, 57.458900
392, 60.269500
393, 63.080200
394, 65.890900
395, 68.701500
396, 71.512200
397, 74.322900
398, 77.133600
399, 79.944200
400, 82.754900
401, 83.628000
402, 84.501100
403, 85.374200
404, 86.247300
405, 87.120400
406, 87.993600
407, 88.866700
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409, 90.612900
410, 91.486000
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437, 99.410200
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440, 104.865000
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626, 85.052600
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631, 83.329700
632, 83.370700
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639, 83.658100
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659, 80.195800
660, 80.214600
661, 80.420900
662, 80.627200
663, 80.833600
664, 81.039900
665, 81.246200
666, 81.452500
667, 81.658800
668, 81.865200
669, 82.071500
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673, 81.079700
674, 80.680400
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680, 78.284200
681, 77.427900
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683, 75.715300
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686, 73.146500
687, 72.290200
688, 71.433900
689, 70.577600
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716, 66.702000
717, 65.427500
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721, 62.432200
722, 63.260300
723, 64.088500
724, 64.916600
725, 65.744800
726, 66.573000
727, 67.401100
728, 68.229300
729, 69.057400
730, 69.885600
731, 70.405700
732, 70.925900
733, 71.446000
734, 71.966200
735, 72.486300
736, 73.006400
737, 73.526600
738, 74.046700
739, 74.566900
740, 75.087000
741, 73.937600
742, 72.788100
743, 71.638700
744, 70.489300
745, 69.339800
746, 68.190400
747, 67.041000
748, 65.891600
749, 64.742100
750, 63.592700
751, 61.875200
752, 60.157800
753, 58.440300
754, 56.722900
755, 55.005400
756, 53.288000
757, 51.570500
758, 49.853100
759, 48.135600
760, 46.418200
761, 48.456900
762, 50.495600
763, 52.534400
764, 54.573100
765, 56.611800
766, 58.650500
767, 60.689200
768, 62.728000
769, 64.766700
770, 66.805400
771, 66.463100
772, 66.120900
773, 65.778600
774, 65.436400
775, 65.094100
776, 64.751800
777, 64.409600
778, 64.067300
779, 63.725100
780, 63.382800
781, 63.474900
782, 63.567000
783, 63.659200
784, 63.751300
785, 63.843400
786, 63.935500
787, 64.027600
788, 64.119800
789, 64.211900
790, 64.304000
791, 63.818800
792, 63.333600
793, 62.848400
794, 62.363200
795, 61.877900
796, 61.392700
797, 60.907500
798, 60.422300
799, 59.937100
800, 59.451900
801, 58.702600
802, 57.953300
803, 57.204000
804, 56.454700
805, 55.705400
806, 54.956200
807, 54.206900
808, 53.457600
809, 52.708300
810, 51.959000
811, 52.507200
812, 53.055300
813, 53.603500
814, 54.151600
815, 54.699800
816, 55.248000
817, 55.796100
818, 56.344300
819, 56.892400
820, 57.440600
821, 57.727800
822, 58.015000
823, 58.302200
824, 58.589400
825, 58.876500
826, 59.163700
827, 59.450900
828, 59.738100
829, 60.025300
830, 60.312500];
fid=fopen('d65.txt','wb');
for i=1:length(data)
fprintf(fid,'%d %3.4f \n',data(i,1),data(i,2));
end
fclose(fid);
plot(data(:,1), data(:,2), 'b', 'linewidth',1.5);
title('D65','FontSize',14);
set(gca,'FontSize',14);
ylabel('relative spectral power distribution','fontsize',14);
xlabel('wavelength (nm)','fontsize',14);
axis([300 830 0 120]);
set(gcf,'PaperUnits','inches','PaperPosition',[0 0 6 5]);
grid on;
pause;
print -dpng d65.png -r100
close;