mlib_imagecrosscorrel_fp(3mlib) [opensolaris man page]
mlib_ImageCrossCorrel_Fp(3MLIB) mediaLib Library Functions mlib_ImageCrossCorrel_Fp(3MLIB)NAME
mlib_ImageCrossCorrel_Fp - cross correlation
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageCrossCorrel_Fp(mlib_d64 *correl, const mlib_image *img1,
const mlib_image *img2);
DESCRIPTION
The mlib_ImageCrossCorrel_Fp() function computes the cross-correlation between a pair of floating-point images.
It uses the following equation:
1 w-1 h-1
correl[i] = ----- * SUM SUM (img1[x][y][i] * img2[x][y][i])
w*h x=0 y=0
where w and h are the width and height of the images, respectively.
PARAMETERS
The function takes the following arguments:
correl Pointer to cross correlation array on a channel basis. The array must be the size of channels in the images. correl[i] contains
the cross-correlation of channel i.
img1 Pointer to first image.
img2 Pointer to second image.
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 TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Committed |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO mlib_ImageAutoCorrel(3MLIB), mlib_ImageAutoCorrel_Fp(3MLIB), mlib_ImageCrossCorrel(3MLIB), mlib_ImageNormCrossCorrel(3MLIB),
mlib_ImageNormCrossCorrel_Fp(3MLIB), attributes(5)SunOS 5.11 2 Mar 2007 mlib_ImageCrossCorrel_Fp(3MLIB)
Check Out this Related Man Page
mlib_SignalCrossCorrel_S16(3MLIB) mediaLib Library Functions mlib_SignalCrossCorrel_S16(3MLIB)NAME
mlib_SignalCrossCorrel_S16, mlib_SignalCrossCorrel_S16S, mlib_SignalCrossCorrel_F32, mlib_SignalCrossCorrel_F32S - signal cross correlation
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_SignalCrossCorrel_S16(mlib_d64 *correl,
const mlib_s16 *src1, const mlib_s16 *src2, mlib_s32 n);
mlib_status mlib_SignalCrossCorrel_S16S(mlib_d64 *correl,
const mlib_s16 *src1, const mlib_s16 *src2, mlib_s32 n);
mlib_status mlib_SignalCrossCorrel_F32(mlib_d64 *correl,
const mlib_f32 *src1, const mlib_f32 *src2, mlib_s32 n);
mlib_status mlib_SignalCrossCorrel_F32S(mlib_d64 *correl,
const mlib_f32 *src1, const mlib_f32 *src2, mlib_s32 n);
DESCRIPTION
Each of these functions performs cross correlation.
For monaural signals, the following equation is used:
1 n-1
correl[0] = --- * SUM (src1[i] * src2[i])
n i=0
For stereo signals, the following equation is used:
1 n-1
correl[0] = --- * SUM (src1[2*i] * src2[2*i])
n i=0
1 n-1
correl[1] = --- * SUM (src1[2*i + 1] * src2[2*i + 1])
n i=0
PARAMETERS
Each of the functions takes the following arguments:
correl Pointer to the cross correlation array. In the stereo version, correl[0] contains the cross correlation of channel 0, and cor-
rel[1] contains the cross correlation of channel 1.
src1 First source signal array.
src2 Second source signal array.
n Number of samples in the source signal arrays.
RETURN VALUES
Each of the functions returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Committed |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO mlib_SignalAutoCorrel_S16(3MLIB), attributes(5)SunOS 5.11 2 Mar 2007 mlib_SignalCrossCorrel_S16(3MLIB)