mediaLib Library Functions mlib_ImageAutoCorrel(3MLIB)
NAME
mlib_ImageAutoCorrel - auto-correlation of an image
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include
mlib_status mlib_ImageAutoCorrel(mlib_d64 *correl, const mlib_image *img,
mlib_s32 dx, mlib_s32 dy);
DESCRIPTION
The mlib_ImageAutoCorrel() function computes the auto-
correlation of an 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, respec-
tively.PARAMETERS
The function takes the following arguments:correl Pointer to auto-correlation array where size is
equal to the number of channels. correl[i] con-
tains 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 attri-
butes:SunOS 5.11 Last change: 2 Mar 2007 1
mediaLib Library Functions mlib_ImageAutoCorrel(3MLIB)
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Interface Stability | Committed ||_____________________________|_____________________________|
| MT-Level | MT-Safe |
|_____________________________|_____________________________|
SEE ALSO
mlib_ImageAutoCorrel_Fp(3MLIB),
mlib_ImageCrossCorrel(3MLIB),
mlib_ImageCrossCorrel_Fp(3MLIB), attributes(5)
SunOS 5.11 Last change: 2 Mar 2007 2