AIPS NRAO AIPS HELP file for RGBGAMMA in 31DEC18



As of Mon Jan 22 15:14:23 2018



HELP SECTION

RGBGAMMA
Type: Adverb  (Real array(3))
Use:  Array used to specify a red, green, blue (resp.) gamma correction.
      Most display devices do not produce a linear appearance for a
      linear input.  If input values, range from 0 to 1, the gamma
      correction causes (input ** (1/gamma)) to be sent to the device.
      The higher the gamma, the more "pastel" the appearance of color.
      Typical values for workstations are around 2.  Try the verb
      GAMMASET to see the effect of the gamma correction.
Null value:
      RGBGAMMA(1) = 0 => use gamma of the TV display.
      RGBGAMMA(2) = 0 => use RGBGAMMA(1)
      RGBGAMMA(3) = 0 => use RGBGAMMA(1)
Verbs:
   GAMMASET...Play with TV gamma correction (setting it on button C if
              you know the Manager password).  Sets RGBGAMMA.
Tasks:
   TVRGB......Display 3-color images on TV displays.  RGBGAMMA is used
              on any PostScript output.

EXPLAIN SECTION


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