up [pdf]
from rsf.proj import *

# Download data
Fetch('mona.img','imgs')

# Convert to standard format
Flow('mona','mona.img',
     '''
     echo n1=512 n2=513 in=$SOURCE data_format=native_uchar |
     dd type=float
     ''',stdin=0)

Result('mona',
       '''
       grey transp=n allpos=y title="Mona Lisa"
       color=b screenratio=1 wantaxis=n
       ''')

End()

sfdd
sfgrey

data/imgs/mona.img