mlib_ImageSConv3x3_Fp

- separable 3x3 convolution

Synopsis

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

mlib_status mlib_ImageSConv3x3_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_ImageSConv3x3_Fp() function performs a separable 3x3 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 = 3, n = 3, dm = (m - 1)/2 = 1, dn = (n - 1)/2 = 1.

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:

See Also

mlib_ImageConv2x2(3MLIB), mlib_ImageConv2x2_Fp(3MLIB), mlib_ImageConv2x2Index(3MLIB), mlib_ImageConv3x3(3MLIB), mlib_ImageConv3x3_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_ImageConv7x7_Fp(3MLIB), mlib_ImageConv7x7Index(3MLIB), mlib_ImageConvKernelConvert(3MLIB), mlib_ImageConvMxN(3MLIB), mlib_ImageConvMxN_Fp(3MLIB), mlib_ImageConvMxNIndex(3MLIB), mlib_ImageConvolveMxN(3MLIB), mlib_ImageConvolveMxN_Fp(3MLIB), mlib_ImageSConv3x3(3MLIB), mlib_ImageSConv5x5(3MLIB), mlib_ImageSConv5x5_Fp(3MLIB), mlib_ImageSConv7x7(3MLIB), mlib_ImageSConv7x7_Fp(3MLIB), mlib_ImageSConvKernelConvert(3MLIB), attributes(5)