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Diffstat (limited to 'funtools/fitsy/doc/imageval.wu')
| -rw-r--r-- | funtools/fitsy/doc/imageval.wu | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/funtools/fitsy/doc/imageval.wu b/funtools/fitsy/doc/imageval.wu new file mode 100644 index 0000000..e5ab468 --- /dev/null +++ b/funtools/fitsy/doc/imageval.wu @@ -0,0 +1,27 @@ + +Image FITS Values +================= + + When a FITS header is scanned in memory or read from a file several + image values are retrieved from the header and stored in s #FITSImage + structure. This structure may be accesed with the following macros: + ++ + ##define #ft_hasbscale(fits) ( fits->image->has_bscale ) + ##define #ft_bscale(fits) ( fits->image->bscale ) + ##define #ft_hasbzero(fits) ( fits->image->has_bzero ) + ##define #ft_bzero(fits) ( fits->image->bzero ) + ##define #ft_hasblank(fits) ( fits->image->has_blank ) + ##define #ft_blank(fits) ( fits->image->blank ) + + typedef struct #FITSImage { + int has_bscale; + int bscale; + int has_bzero; + int bzero; + + int has_blank; + int blank; + } #"*FITSImage"; ++ + |