A little tool to create 24-bit postscript color images from 2D fits files or text files. Uses pgplot and optionally lua for scripting. Note, that the raster images in postscript code generated by pgplot contain only 256 colors selected from 24-bit palette even though the colors are expressed as 24-bit numbers. Colormap replaces the pgplot raster images with fully 24-bit colors.

USAGE: colormap [options] file [luafile]

Please note, that the options are case sensitive
For a list of commands available in luafile, use command ListCommands();

The available command line options are:
 -a <value>  lowest value to display
 -b <value>  highest value to display
 -o <file>   output to file (.gif or .eps/.ps) 
 -f <flag>   set flags. Currently supported flags are:
               flipx:      flip x axis
               noaxis:     disable displaying x and y axis
               noaxis:     disable displaying x and y axis
               nonumbers:  disable displaying the numbers
                 noxnumbers, noynumbers
               noticks:    disable drawing ticks
               nowedge:    disable displaying the color wedge
               reverse:    reverse colormap
               rticks:     reverse tickmark color
               trismooth:  use 2D triangular kernel to
                           smooth the data
               verbose:    verbose output
               wedgeright: place the wedge vertically on the right
               8bit:       generate pgplot postscript
               24bit:      generate 24 bit postscript (DEFAULT)
 -g <code>   set scaling method, possible values are:
             linear, log, alog, sqrt, square, cbrt, cube 
             asinh, sinh, atanh, tanh and histeq
             pow and lupton have optional parameters
 -l <label>  label for the X-axis
 -m <label>  label for the Y-axis
 -p <code>   set color palette type, possible values are:
             rainbow (default), grayscale, red, green, blue
             bb, heat, bb2, iraf, aips, rainbow2, rainbow3(?)
 -s <value>  pixelscale for both x and y
 -t <title>  set title of the figure
 -v <var=va> set variables (e.g. " -v label_thickness=2.0")
               currently supported are:
               contrast
               brightness
               contoursigma (smoothing factor)
               contourstart (low sigma, default 3.0)
               contoursampling (sampling factor, default 1.0)
               tick_length
               tick_thickness
               label_size
               label_thickness
               x1,y1,x2,y1
               cx,cy
               sigma,region,iter
               bregion
               scale (resampling factor)
               bcgcolor (e.f.#C0C000)
 -x <value>  reference x pixel
 -y <value>  reference y pixel
 -h          display this help