1mlib_ImageAutoCorrel_Fp(3MLmIeBd)iaLib Library Functimolnisb_ImageAutoCorrel_Fp(3MLIB)
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NAME

6       mlib_ImageAutoCorrel_Fp - auto-correlation of an image
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SYNOPSIS

9       cc [ flag... ] file... -lmlib [ library... ]
10       #include <mlib.h>
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12       mlib_status mlib_ImageAutoCorrel_Fp(mlib_d64 *correl,
13            const mlib_image *img, mlib_s32 dx, mlib_s32 dy);
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DESCRIPTION

17       The mlib_ImageAutoCorrel_Fp() function computes the auto-correlation of
18       a floating-point image, given an offset.
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21       It uses the following equation:
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23                           1          w-dx-1 h-dy-1
24         correl[i] = -------------- *  SUM    SUM  (img[x][y][i] * img[x+dx][y+dy][i])
25                     (w-dx)*(h-dy)     x=0    y=0
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29       where w and h are the width and height of the image, respectively.
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PARAMETERS

32       The function takes the following arguments:
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34       correl    Pointer to auto-correlation array where size is equal to  the
35                 number  of  channels. correl[i] contains the auto-correlation
36                 of channel i.
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39       img       Pointer to image.
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42       dx        Displacement in the X direction.
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45       dy        Displacement in the Y direction.
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RETURN VALUES

49       The function returns MLIB_SUCCESS if successful. Otherwise  it  returns
50       MLIB_FAILURE.
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ATTRIBUTES

53       See attributes(5) for descriptions of the following attributes:
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58       ┌─────────────────────────────┬─────────────────────────────┐
59       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
60       ├─────────────────────────────┼─────────────────────────────┤
61       │Interface Stability          │Committed                    │
62       ├─────────────────────────────┼─────────────────────────────┤
63       │MT-Level                     │MT-Safe                      │
64       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

67       mlib_ImageAutoCorrel(3MLIB),  mlib_ImageCrossCorrel(3MLIB), mlib_Image‐
68       CrossCorrel_Fp(3MLIB), attributes(5)
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72SunOS 5.11                        2 Mar 2007    mlib_ImageAutoCorrel_Fp(3MLIB)
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