#!F-adobe-helvetica-medium-r-normal--18* #!N #!N #!Rtall713 DXGAMMA #!N sets the gamma correction for software-rendered images displayed to the screen by a Display or Image tool. On many display devices a given change in the digital brightness of the image is not reflected in a corresponding change in screen brightness. A gamma correction is a nonlinear adjustment of the pixel values to compensate for this difference and produce a more accurate representation on the screen. By default (except for 8-bit windows on the sgi architecture), the correction factor (exponent) is 2 (two), on the assumption that the display is not otherwise gamma corrected. The DXGAMMA variable allows you to override this default. In particular, if the display device is already gamma corrected, set the variable to 1 (one). (See Display in IBM Visualization Data Explorer User's Reference, and README_sgi in /usr/lpp/dx.) #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Ltall715,dxall715 h DXGAMMA_8BIT, DXGAMMA_12BIT, and DXGAMMA_24BIT #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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