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NAME

       im_hist - create a displayable histogram from an image

SYNOPSIS

       #include <vips/vips.h>

       int im_hist( in, plotofhist, bandno )
       IMAGE *in, *plotofhist;
       int bandno;

DESCRIPTION

       im_hist()  creates  a  displayable histogram file for the image held by
       the image descriptor in.  The created displayable histogram is held  in
       the  IMAGE  descriptor  plotofhist.   If  bandno  ==  -1  a displayable
       histogram of all input bands is created else the  histogram  of  bandno
       only is created.

       See im_histplot(3) for rules on the size and scaling og the result.

RETURN VALUE

       All functions returns 0 on success and -1 on error.

SEE ALSO

       im_histgr(3), im_histplot(3).

COPYRIGHT

       N. Dessipris

AUTHOR

       N. Dessipris - 10/05/1991

                                  10 May 1991