# http://gnuplot-surprising.blogspot.com/2011/09/gnuplot-background-image.html
#'/home/dpavlin/zc/www/logo-color.png' binary filetype=png origin=(0,0) dx=0.5 dy=0.5 with rgbimage notitle
# http://gnuplot-surprising.blogspot.com/2011/09/gnuplot-background-image.html
#'/home/dpavlin/zc/www/logo-color.png' binary filetype=png origin=(0,0) dx=0.5 dy=0.5 with rgbimage notitle