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im_invert(3)                                                      im_invert(3)




NAME

       im_invert - inverts an image pointed by an image descriptor.


SYNOPSIS

       #include <vips/vips.h>

       int im_invert(in, out)
       IMAGE *in, *out;


DESCRIPTION

       im_invert  inverts the image held by image descriptor in and writes the
       result on the image descriptor out.  The  function  works  on  FMTUCHAR
       images  only.  The result at point x of the input image is 255-x at the
       output image.  Input can have any no of channels.
         This is not a generally useful program -- it is included as an  exam-
       ple  of  a  very  simple  new-style  IO function. Feel the power of the
       source, Luke!


RETURN VALUE

       The function returns 0 on success and -1 on error.


SEE ALSO

       im_add(3), im_lintra(3), im_multiply(3).


AUTHOR

       J. Cupitt - 21/7/93



                                 11 April 1990                    im_invert(3)

im_invert 7.14.5 - Generated Sun Sep 7 15:46:12 CDT 2008
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