title: Luminance (disambiguation)
text: # Luminance (disambiguation)
  
  Luminance is a photometric measure of the density of luminous intensity in a given direction, measured in candela per square metre $(cd/m^2).$
  
  Luminance may also refer to:
  
  * Relative luminance, luminance normalized with respect to a reference white
  * Luma (video), an approximation of relative luminance, used in video signals
  