relative-luminance
Version:
calculate relative luminance
3 lines (2 loc) • 444 B
JavaScript
!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?module.exports=n():"function"==typeof define&&define.amd?define(n):e.relativeLuminance=n()}(this,function(){var e=.2126,n=.7152,t=.0722,o=1/12.92;function f(e){return Math.pow((e+.055)/1.055,2.4)}return function(i){var u=i[0]/255,r=i[1]/255,d=i[2]/255,c=u<=.03928?u*o:f(u),a=r<=.03928?r*o:f(r),p=d<=.03928?d*o:f(d);return c*e+a*n+p*t}});
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