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- GGGGAAAAMMMMCCCCAAAALLLL((((6666DDDD)))) GGGGAAAAMMMMCCCCAAAALLLL((((6666DDDD))))
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- NNNNAAAAMMMMEEEE
- gamcal - visually check gamma display calibration
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- ////uuuussssrrrr////ssssbbbbiiiinnnn////ggggaaaammmmccccaaaallll
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- _g_a_m_c_a_l 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.
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- /usr/sbin/gamma
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- PPPPaaaaggggeeee 1111
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