information from FITS files is extracted during conversion. Command Line Options -f [linear|asinh|log|gamma|normal|sqrt|sqr|logistic|atan] Global tone mapping function profile: linear, asinh, log, gamma (as in sRGB), normal (Gauss cumulative distribution function), square root, square, logistic (emulating classical photography sensitivity) and atan. -f0 f0 Scale of output profile: f0*Func(...) + z. -fz z