A new approach of mapping luminance values to display devices has been
introduced. The completely new idea of applying the incident light
metering method in computer graphics has been described. Just as in
photography, it gives good results for average scenes, and for
complicated lighting condition scenes as well. It shows its strength
even where usual methods based on reflected light metering fail. The
new method displays bright objects as really bright, and dark objects
as really dark, independent of the average reflectivity of the
scene. All colors are reproduced close to the originally selected
patterns using only a simple linear scale factor which is easy to
compute. It works well for high contrast (e.g. back lit) scenes,
too. The method can be used with or without absolute units. The
lighting atmosphere of the whole scene can be changed if the scale
factor m is multiplied with a constant c, where e.g. 
. In
this way, irrespective of real irradiances, it is possible to give an
image a brighter or darker lighting atmosphere.
An important topic for future work is the use of absolute units in irradiance metering. It would be interesting to combine the incident light metering with the work done by Tumblin and Rushmeier [TuRu93], combining two important human vision characteristics this way.