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mlib_imageautocorrel(3mlib) [opensolaris man page]

mlib_ImageAutoCorrel(3MLIB)				    mediaLib Library Functions				       mlib_ImageAutoCorrel(3MLIB)

NAME
mlib_ImageAutoCorrel - auto-correlation of an image SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> 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, 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 chan- nel 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 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 2 Mar 2007 mlib_ImageAutoCorrel(3MLIB)

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mlib_SignalAutoCorrel_S16(3MLIB)			    mediaLib Library Functions				  mlib_SignalAutoCorrel_S16(3MLIB)

NAME
mlib_SignalAutoCorrel_S16, mlib_SignalAutoCorrel_S16S, mlib_SignalAutoCorrel_F32, mlib_SignalAutoCorrel_F32S - signal auto-correlation SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_SignalAutoCorrel_S16(mlib_d64 *correl, const mlib_s16 *src, mlib_s32 disp, mlib_s32 n); mlib_status mlib_SignalAutoCorrel_S16S(mlib_d64 *correl, const mlib_s16 *src, mlib_s32 disp, mlib_s32 n); mlib_status mlib_SignalAutoCorrel_F32(mlib_d64 *correl, const mlib_f32 *src, mlib_s32 disp, mlib_s32 n); mlib_status mlib_SignalAutoCorrel_F32S(mlib_d64 *correl, const mlib_f32 *src, mlib_s32 disp, mlib_s32 n); DESCRIPTION
Each of these functions performs auto-correlation. For monaural signals, the following equation is used: 1 n-d-1 correl[0] = ----- * SUM (src[i] * src[i + d]) n - d i=0 For stereo signals, the following equation is used: 1 n-d-1 correl[0] = ----- * SUM (src[2*i] * src[2*(i + d)]) n - d i=0 1 n-d-1 correl[1] = ----- * SUM (src[2*i + 1] * src[2*(i + d) + 1]) n - d i=0 where d = disp. PARAMETERS
Each of the functions takes the following arguments: correl Pointer to the auto-correlation array. In the stereo version, correl[0] contains the auto-correlation of channel 0, and correl[1] contains the auto-correlation of channel 1. src Source signal array. disp Displacement. 0 <= disp < n. n Number of samples in the source signal array. 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_SignalCrossCorrel_S16(3MLIB), attributes(5) SunOS 5.11 2 Mar 2007 mlib_SignalAutoCorrel_S16(3MLIB)
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