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<A NAME="section-1.1.1"><H3>Image FITS Values</H3></A>
<P>
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 <B>FITSImage</B>
structure. This structure may be accesed with the following macros:
<PRE>
#define <B>ft_hasbscale</B>(fits) ( fits->image->has_bscale )
#define <B>ft_bscale</B>(fits) ( fits->image->bscale )
#define <B>ft_hasbzero</B>(fits) ( fits->image->has_bzero )
#define <B>ft_bzero</B>(fits) ( fits->image->bzero )
#define <B>ft_hasblank</B>(fits) ( fits->image->has_blank )
#define <B>ft_blank</B>(fits) ( fits->image->blank )
typedef struct <B>FITSImage</B> {
int has_bscale;
int bscale;
int has_bzero;
int bzero;
int has_blank;
int blank;
} <B>*FITSImage</B>;
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