Content-type: text/html Man page of mlib_ImageAutoCorrel_Fp

mlib_ImageAutoCorrel_Fp

Section: mediaLib Library Functions (3MLIB)
Updated: 2 Mar 2007
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NAME

mlib_ImageAutoCorrel_Fp - auto-correlation of an image  

SYNOPSIS

cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>

mlib_status mlib_ImageAutoCorrel_Fp(mlib_d64 *correl,
    const mlib_image *img, mlib_s32 dx, mlib_s32 dy);

 

DESCRIPTION

The mlib_ImageAutoCorrel_Fp() function computes the auto-correlation of a floating-point image, given an offset.

It uses the following equation:

                  1          w-dx-1 h-dy-1
correl[i] = -------------- *  SUM    SUM  (img[x][y][i] * img[x+dx][y+dy][i])
           (w-dx)*(h-dy)     x=0    y=0

where w and h are the width and height of the image, respectively.  

PARAMETERS

The function takes the following arguments:

correl

Pointer to auto-correlation array where size is equal to the number of channels. correl[i] contains the auto-correlation of channel i.

img

Pointer to image.

dx

Displacement in the X direction.

dy

Displacement in the Y direction.

 

RETURN VALUES

The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.  

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE

Interface StabilityCommitted

MT-Level

 

SEE ALSO

mlib_ImageAutoCorrel(3MLIB), mlib_ImageCrossCorrel(3MLIB), mlib_ImageCrossCorrel_Fp(3MLIB), attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:38:00 GMT, October 02, 2010