up [pdf]
from rsf.proj import *

# Download the input data file
Fetch('lena.img','imgs')

# Create RSF header
Flow('lena.hdr','lena.img',
     'echo n1=512 n2=513 in=$SOURCE data_format=native_uchar',
     stdin=0)

# Convert to floating point and window out first trace
Flow('lena','lena.hdr','dd type=float | window f2=1')

# Display
Result('lena',
       '''
       sfgrey title="Hello, World!" transp=n color=b bias=128
       clip=100 screenratio=1 
       ''')

# Wrap up
End()

sfdd
sfwindow
sfgrey

data/imgs/lena.img