gmic big_image.tif # brings up and displays a black and white low quality image.
gmic big_image.tif -resize 20%,20% -output big_image.jpg # generates a similar image.
Building from gmic_22.214.171.124 and testing in these two environments:
64 bit Scientific Linux 6.2 (64 bit) and Fedora 15 (32 bit)
Get test file from here: http://aeronav.faa.gov/content/aeronav/sectional_files/Cincinnati_88.zip (unzip and look for a 50MB tif file)