usage : getqv10.sh [-o filename] [-n num] [-c color] [-g gamma] [-s scale] [-b brightnes] [-i] [-nm] [-jpg|-gif]
num default : all
color default(gif) : 256(color)
default(jpg) : 75(quality)
gamma default : 2.0
scale default : 100
brightnes default : 0
-i interlace
-nm normalize
-jpg output format(default)
-gif output format