.TH IM_ABS 3 "25 April 1991"
.SH NAME
im_abs \- finds the absolute value or the magnitude of an image
.SH SYNOPSIS
#include <vips/vips.h>

int im_abs( in, out )
.br
IMAGE *in, *out;
.SH DESCRIPTION
.B im_abs(3)
finds the absolute value of an image. Copy for UNSIGNED types, negate
for int types, fabs(3) for float types, and calculate modulus for
complex types. Any size, any number of bands. 
.SH RETURN VALUE
The function returns 0 on success and -1 on error.
.SH SEE ALSO
im_exp10tra(3), im_sign(3)