GAMCAL(6D)							    GAMCAL(6D)

NAME    [Toc]    [Back]

     gamcal - visually check gamma display calibration

SYNOPSIS    [Toc]    [Back]

     /usr/sbin/gamcal

DESCRIPTION    [Toc]    [Back]

     gamcal checks to see if the gamma correction value	is correct by
     comparing the intensity of	full on/full off horizontal lines to a region
     of	half-intensity grey.  Normally the gamma of the	display	should be set
     to	2.4 using the program /usr/sbin/gamma.	When the gamma of the display
     is	set correctly, there should be little or no change in brightness in
     each column of rectangles in the window.  In the column on	the far	left,
     the horizontal lines alternate full intensity and black.  The average
     brightness	of the top region should be 50%	white.	The solid areas	in the
     left column are filled with a constant 50%	grey.  If the display is
     properly calibrated, the solid and	the striped regions should have	the
     same apparent brightness.

SEE ALSO    [Toc]    [Back]

     /usr/sbin/gamma


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