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man im_lowpass(3)
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IM_CONV(3)                                                          IM_CONV(3)




NAME

       im_lowpass - remove high frequencies quickly


SYNOPSIS

       #include <vips/vips.h>

       int im_lowpass(in, out, x, y)
       IMAGE *in, *out;
       int x, y;


DESCRIPTION

       Expand  image  up  to X by Y pixels. Linear interpolation. Used by low-
       pass(1X) for simple and nasty low-pass filtering. The  result  is  very
       poor,  but  good  enough for smoothing out whites. Any number of bands,
       output size == input size, any non-complex type.



RETURN VALUE

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


SEE ALSO

       im_shrink(3), im_similarity_area(3).


COPYRIGHT

       National Gallery


AUTHOR

       Too embarrassed to say



                                  2 May 1991                        IM_CONV(3)

im_lowpass 7.14.5 - Generated Sun Sep 7 18:55:34 CDT 2008
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