#!F-adobe-helvetica-medium-r-normal--18*
#!N 
#!N  #!Rgammaco Gamma Correction 
#!N #!N #!N Displayed images generated by Display or Image are 
gamma corrected. Gamma correction adjusts for the fact that for many 
display devices a doubling of the digital value of an image's 
brightness does not necessarily produce a doubling of the actual screen 
brightness. Thus, before displaying to the screen, the pixel values are 
adjusted non-linearly to produce a more accurate appearance. #!N #!N The 
environment variables DXGAMMA_8BIT, DXGAMMA_12BIT, and DXGAMMA_24BIT are used to specify values 
for gamma of 8-, 12-, and 24-bit windows, respectively. If the 
appropriate DXGAMMA_  #!F-adobe-times-medium-i-normal--18*   n #!EF BIT environment variable is not set, 
the value of the environment variable DXGAMMA will be used if 
one is defined. Otherwise, the module uses the system default, which 
depends on the machine architecture and window depth. This default is 
always 2 (two) except for 8-bit sgi windows, for which it 
is 1 (one). Note that the default depends on the machine 
on which the software renderer is running, not on the machine 
that displays the image. #!N #!N #!N  #!F-adobe-times-medium-i-normal--18*   Next Topic #!EF 
#!N #!N  #!Ltall817,dxall817 h Obtaining a WYSIWYG image of a higher resolution  #!EL  #!N  #!F-adobe-times-medium-i-normal--18*   #!N 
