idlastro / TV Display Procedures: PIXCOLOR

[Source code]

NAME
PIXCOLOR
PURPOSE
Assign colors to specified pixel values in a color lookup table
EXPLANATION
Colors can be specified either from the list in cgcolor 
(http://www.idlcoyote.com/programs/cgcolor.pro ) or as 1 letter 
abbreviations for 8 common colors.
CALLING SEQUENCE
PIXCOLOR, pixvalue, color         ;Set color at specified pixel values
INPUT PARMETERS
pixvalue - value or range of pixel values whose color will be modified.
        A single pixel value may be specified by an integer
        If a range of values is specified, then it must be written
        as a string, with a colon denoting the range (e.g.'102:123')
        If omitted, program will prompt for this parameter.
AL INPUT PARAMETER
color - scalar string specifying either a full color name available in
       CGCOLOR, or a  single character string giving one of the 
       specified colors: 'R' (red), 'B' (blue), 'G' (green)
        'Y' (yellow), 'T' (turquoise), 'V' (violet), 'W' (white)
        or 'D' (dark).  If omitted, program will prompt for this 
        parameter.
OUTPUTS
None
PROCEDURE
TVLCT is used in RGB mode to load the specified pixel values.
EXAMPLE
Set pixel values of 245 to a color of red
IDL> pixcolor,245,'R'
et pixel values 120 to 150 to Magenta
DL> pixcolor,'120:150','Magenta'      
REVISION HISTORY
Written, W. Landsman ST Systems Corp.           February, 1987
Converted to IDL V5.0   W. Landsman   September 1997
llow specification of cgcolor names   April 2011