fitstopnm Man page

fitstopnm General Commands Manual fitstopnm


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 want.

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 pro‐
duce an ASCII portable anymap.

The program will tell what kind of anymap is writing. All flags can be
abbreviated to their shortest unique prefix.

FITS stands for Flexible Image Transport System. A full description
can be found in Astronomy & Astrophysics Supplement Series 44 (1981),
page 363.


pnmtofits, pgm(5), pnmflip


Copyright (C) 1989 by Jef Poskanzer, with modifications by Daniel
Briggs ( and Alberto Accomazzi (alberto@cfa.har‐

20 September 89 fitstopnm

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