bril

plural brils

1. A unit of luminance equal to tfrac 1 10⁷π candela per square metre.

   Here, Q is brightness (or perceived luminance), measured in brils.

   2005, Erik Reinhard, Greg Ward, Sumanta Pattanaik, High Dynamic Range Imaging, →ISBN

   3 more examples

   In the experiments, the brightness in brils was measured as a function of luminance for various adaptation levels of the eye.

   1993, Course notes - Volume 22, Association for Computing Machinery's Special Interest Group on Computer Graphics, →OCLC, page 7-7

   Tumblin's model aims to match a perceived quality known as brightness, measured in brils, so that the real world brightness and display brightness can be equated.

   2012, Julie Dorsey, Philipp Slusallek, Rendering Techniques ’97, →ISBN

   many of the old units-such as the nox, phot, glim, skot, and scot (identical), as well as the bril and brill (different)—are so antiquated as to be of interest only to the historian.

   2014, William Ross McCluney, Introduction to Radiometry and Photometry, Second Edition, page 360