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IM_ROTQUAD

IM_ROTQUAD

Section: C Library Functions (3) Updated: 07 July 1990
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NAME

im_rotquad - rotates the four quadrants of an image  

SYNOPSIS

#include <vips/vips.h>

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

DESCRIPTION

im_rotquad rotates the four quadrants of the image held by the image descriptor in and writes the result on the image descriptor out.

The function is used primarily to rotate a fourier transform in such a way that the coordinate (0,0) is near the centre of the image, the so-called optical transform.

The function operates on any input; output has the same format, sizes and bands as input.  

RETURN VALUE

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

SEE ALSO

im_fwfft(3), im_invfft(3), im_scaleps(3).  

COPYRIGHT


N. Dessipris  

AUTHOR

N. Dessipris - 06/07/1990


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
SEE ALSO
COPYRIGHT
AUTHOR

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Time: 21:48:26 GMT, April 16, 2011