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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-&gt;image-&gt;has_bscale       )
    #define <B>ft_bscale</B>(fits)           ( fits-&gt;image-&gt;bscale           )
    #define <B>ft_hasbzero</B>(fits)         ( fits-&gt;image-&gt;has_bzero        )
    #define <B>ft_bzero</B>(fits)            ( fits-&gt;image-&gt;bzero            )
    #define <B>ft_hasblank</B>(fits)         ( fits-&gt;image-&gt;has_blank        )
    #define <B>ft_blank</B>(fits)            ( fits-&gt;image-&gt;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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</PRE>


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