mlib_imagestddev(3mlib) [sunos man page]

mlib_ImageStdDev(3MLIB) 				    mediaLib Library Functions					   mlib_ImageStdDev(3MLIB)

NAME

       mlib_ImageStdDev - image standard deviation

SYNOPSIS

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

       mlib_status mlib_ImageStdDev(mlib_d64 *sdev, const mlib_image *img, const mlib_d64 *mean);

DESCRIPTION

       The mlib_ImageStdDev() function computes the standard deviation for each channel in the source image.

       It uses the following equation:

		     1	   w-1 h-1
       sdev[i] = { ----- * SUM SUM (img[x][y][i] - mean[i])**2 }**0.5
		    w*h    x=0 y=0

       where, in the case of mean == NULL,

		   1	 w-1 h-1
       mean[i] = ----- * SUM SUM img[x][y][i]
		  w*h	 x=0 y=0

PARAMETERS

       The function takes the following arguments:

       sdev	       Pointer	to standard deviation array, whose size is the number of channels in the source image.	sdev[i] contains the stan-
		       dard deviation of channel i.

       img	       Pointer to input image.

       mean	       Pointer to pre-computed mean array for each channel.  (If NULL, it will be computed.)  mean[i] contains the mean of channel
		       i.

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	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_ImageMean(3MLIB), mlib_ImageMean_Fp(3MLIB), mlib_ImageStdDev_Fp(3MLIB), attributes(5)

SunOS 5.10							    10 Nov 2004 					   mlib_ImageStdDev(3MLIB)

mlib_ImageSConv5x5_Fp(3MLIB)				    mediaLib Library Functions				      mlib_ImageSConv5x5_Fp(3MLIB)

NAME

       mlib_ImageSConv5x5_Fp - separable 5x5 convolution

SYNOPSIS

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

       mlib_status mlib_ImageSConv5x5_Fp(mlib_image *dst, const mlib_image *src, const mlib_d64 *hkernel, const mlib_d64 *vkernel, mlib_s32 cmask,
       mlib_edge edge);

DESCRIPTION

       The mlib_ImageSConv5x5_Fp() function performs a separable 5x5 convolution on the source image by using the user-supplied kernel.

       It uses the following equation:

		      m-1-dm n-1-dn
       dst[x][y][i] =  SUM    SUM  src[x+p][y+q][i]*h[p]*v[q]
		      p=-dm  q=-dn

       where m = 5, n = 5, dm = (m - 1)/2 = 2, dn = (n - 1)/2 = 2.

PARAMETERS

       The function takes the following arguments:

       dst	       Pointer to destination image.

       src	       Pointer to source image.

       hkernel	       Pointer to the horizontal kernel.

       vkernel	       Pointer to the vertical kernel.

       cmask	       Channel mask to indicate the channels to be convolved, each bit of which represents a channel in the  image.  The  channels
		       corresponding to one bits are those to be processed. For a single-channel image, the channel mask is ignored.

       edge	       Type of edge condition. It can be one of the following:

		       MLIB_EDGE_DST_NO_WRITE
		       MLIB_EDGE_DST_FILL_ZERO
		       MLIB_EDGE_DST_COPY_SRC
		       MLIB_EDGE_SRC_EXTEND

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	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_ImageConv2x2(3MLIB),     mlib_ImageConv2x2_Fp(3MLIB),     mlib_ImageConv2x2Index(3MLIB),	 mlib_ImageConv3x3(3MLIB),     mlib_Image-
       Conv3x3_Fp(3MLIB),  mlib_ImageConv3x3Index(3MLIB),  mlib_ImageConv4x4(3MLIB),  mlib_ImageConv4x4_Fp(3MLIB),  mlib_ImageConv4x4Index(3MLIB),
       mlib_ImageConv5x5(3MLIB),     mlib_ImageConv5x5_Fp(3MLIB),     mlib_ImageConv5x5Index(3MLIB),	 mlib_ImageConv7x7(3MLIB),     mlib_Image-
       Conv7x7_Fp(3MLIB),    mlib_ImageConv7x7Index(3MLIB),    mlib_ImageConvKernelConvert(3MLIB),    mlib_ImageConvMxN(3MLIB),     mlib_ImageCon-
       vMxN_Fp(3MLIB),	mlib_ImageConvMxNIndex(3MLIB),	mlib_ImageConvolveMxN(3MLIB),  mlib_ImageConvolveMxN_Fp(3MLIB), mlib_ImageSConv3x3(3MLIB),
       mlib_ImageSConv3x3_Fp(3MLIB), mlib_ImageSConv5x5(3MLIB), mlib_ImageSConv7x7(3MLIB), mlib_ImageSConv7x7_Fp(3MLIB), mlib_ImageSConvKernelCon-
       vert(3MLIB), attributes(5)

SunOS 5.10							    10 Nov 2004 				      mlib_ImageSConv5x5_Fp(3MLIB)