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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 -tb.


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 produce an ASCII portable

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.

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