IRCAM.vbs 
Mechanism 

http://www.imagemagick.org/Usage/color/#fx_to_lut
  convert xc:black xc:red xc:yellow xc:green1 xc:cyan xc:blue xc:black \
          +append -filter Cubic -resize 600x30\! gradient_rs_rainbow.jpg

convert -size 100x100 plasma:fractal -virtual-pixel edge -blur 0x5 \
          -shade 140x45  -normalize \
          -size 1x100 xc:black -size 9x100 gradient: \
          +append  gray_image.jpg
  convert -size 10x100  gradient:navy-snow       gradient_ice-sea.png
  convert gray_image.jpg  gradient_ice-sea.png -clut  gray_recolored.jpg