input,s,a,,,,List of input files
output,s,h,"file","none|list|file",,Output type
index,s,h,"1-",,,Extension index range list
extname,s,h,"",,,Extension name pattern
extver,s,h,"",,,Extension version range list
lindex,b,h,"yes",,,List with index?
lname,b,h,"no",,,List with extension name? 
lver,b,h,"no",,,List with extension version? 
ikparams,s,h,"",,,"Image kernel parameters

# Output parameter"
nimages,i,h,,,,Number of images in list