#!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
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