fitstopnm - convert a FITS file into a portable anymap
fitstopnm [__-image__ ''N''? [__-noraw__?
[__-scanmax__? [__-printmax__? [__-min__ ''f''?
[__-max__ ''f''? [''FITSfile''?
Reads a FITS file as input. Produces a portable pixmap if
the FITS file consists of 3 image planes (NAXIS = 3 and
NAXIS3 = 3), a portable graymap if the FITS file consists of
2 image planes (NAXIS = 2), or whenever the -image
flag is specified. The results may need to be flipped top
for bottom; if so, just pipe the output through __pnmflip
The -image option is for FITS files with three axes.
The assumption is that the third axis is for multiple
images, and this option lets you select which one you
Flags -min and -max can be used to override
the min and max values as read from the FITS header or the
image data if no DATAMIN and DATAMAX keywords are found.
Flag -scanmax can be used to force the program to
scan the data even when DATAMIN and DATAMAX are found in the
header. If -printmax is specified, the program will
just print the min and max values and quit. Flag
-noraw can be used to force the program to produce an
ASCII portable anymap.
The program will tell what kind of anymap is writing. All
flags can be abbreviated to their shortest unique
FITS stands for Flexible Image Transport System. A full
description can be found in Astronomy
pnmtofits(1), pgm(5), pnmflip(1)
Copyright (C) 1989 by Jef Poskanzer, with modifications by
Daniel Briggs (firstname.lastname@example.org) and Alberto Accomazzi