27 lines
643 B
Groff
27 lines
643 B
Groff
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.TH IM_CONV 3 "2 May 1991"
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.SH NAME
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im_lowpass \- remove high frequencies quickly
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.SH SYNOPSIS
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#include <vips/vips.h>
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int im_lowpass(in, out, x, y)
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.br
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IMAGE *in, *out;
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.br
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int x, y;
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.SH DESCRIPTION
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Expand image up to X by Y pixels. Linear interpolation. Used by lowpass(1X)
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for simple and nasty low-pass filtering. The result is very poor, but good
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enough for smoothing out whites. Any number of bands, output size == input
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size, any non-complex type.
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.SH RETURN VALUE
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The function returns 0 on success and -1 on error.
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.SH SEE\ ALSO
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im_shrink(3), im_similarity_area(3).
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.SH COPYRIGHT
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.br
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National Gallery
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.SH AUTHOR
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Too embarrassed to say
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