images,s,a,,,,Images
fields,s,h,"image,npix,mean,stddev,min,max",,,Fields to be printed
lower,r,h,INDEF,,,Lower cutoff for pixel values
upper,r,h,INDEF,,,Upper cutoff for pixel values
binwidth,r,h,0.1,,,Bin width of histogram in sigma
format,b,h,yes,,,Format output and print column labels?