Linux System Gamma Calibration  Home | John | Connie |
Publications | Software | Correspondence | NtropiX | NdustriX |
NformatiX | NdeX | Thanks   Electronic display devices-things
like computer terminals, television sets, printers, and cameras-
do not respond to, (or produce,) light intensity linearly; they
are designed intentionally that way. The dominate standard for
how display devices produce light intensity is the NTSC
specification which requires a gamma of 2.2 to be used in US
television receivers. A gamma of 2.2 means that if the
transmitted signal increases by a factor of two, the
corresponding light intensity on the television CRT increases by
2^2.2, which is a factor of about 4.6. A gamma of 2.2 has also
been adopted by the World Wide Web Consortium as a standard,
sRGB, for Internet browsers. Note: there is an addendum,
ViewSonic VA503b Gamma Calibration, that uses the techniques
outlined here for LCD computer monitors.  Unfortunately, not all
manufactures subscribe to the standards. For example, a