= thumbnail =
libtiff utility thumbnail file generator 
{{{
usage: thumbnail [options] input.tif output.tif

where options are:
 -h #           specify thumbnail image height (default is 274)
 -w #           specify thumbnail image width (default is 216)
 -c linear      use linear contrast curve
 -c exp50       use 50% exponential contrast curve
 -c exp60       use 60% exponential contrast curve
 -c exp70       use 70% exponential contrast curve
 -c exp80       use 80% exponential contrast curve
 -c exp90       use 90% exponential contrast curve
 -c exp         use pure exponential contrast curve
}}}