mlib_ImageConvolveMxN(3MLImediaLib Library Functiomlib_ImageConvolveMxN(3MLIB)NAMEmlib_ImageConvolveMxN - MxN convolution, with kernel analysis for tak‐
ing advantage of special cases
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageConvolveMxN(mlib_image *dst, const mlib_image *src,
const mlib_d64 *kernel, mlib_s32 m, mlib_s32 n, mlib_s32 dm,
mlib_s32 dn, mlib_s32 cmask, mlib_edge edge);
DESCRIPTION
The mlib_ImageConvolveMxN() function analyzes the convolution kernel,
converts the floating-point kernel to an integer kernel, then performs
a MxN convolution on the source image by calling either one of the
functions like mlib_ImageSConv3x3(), mlib_ImageConv3x3(), and etc. in
special cases or mlib_ImageConvMxN() in other cases.
The input image and the output image must have the same image type and
have the same number of channels. The unselected channels in the output
image are not overwritten. For single-channel images, the channel mask
is ignored.
It uses the following equation:
m-1-dm n-1-dn
dst[x][y][i] = SUM SUM src[x+p][y+q][i]*k[p][q]
p=-dm q=-dn
where m ≥ 1, n ≥ 1, 0 ≤ dm < m, 0 ≤ dn < n.
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
src Pointer to source image.
kernel Pointer to the convolution kernel, in row major order.
m Width of the convolution kernel. m ≥ 1.
n Height of the convolution kernel. n ≥ 1.
dm X coordinate of the key element in the convolution kernel. 0
≤ dm < m.
dn Y coordinate of the key element in the convolution kernel. 0
≤ dn < n.
cmask Channel mask to indicate the channels to be convolved, each
bit of which represents a channel in the image. The channels
corresponding to 1 bits are those to be processed. For a sin‐
gle-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 │Committed │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmlib_ImageConv2x2(3MLIB), mlib_ImageConv2x2_Fp(3MLIB), mlib_Image‐
Conv2x2Index(3MLIB), mlib_ImageConv3x3(3MLIB), mlib_Image‐
Conv3x3_Fp(3MLIB), mlib_ImageConv3x3Index(3MLIB), mlib_Image‐
Conv4x4(3MLIB), mlib_ImageConv4x4_Fp(3MLIB), mlib_Image‐
Conv4x4Index(3MLIB), mlib_ImageConv5x5(3MLIB), mlib_Image‐
Conv5x5_Fp(3MLIB), mlib_ImageConv5x5Index(3MLIB), mlib_Image‐
Conv7x7(3MLIB), mlib_ImageConv7x7_Fp(3MLIB), mlib_Image‐
Conv7x7Index(3MLIB), mlib_ImageConvKernelConvert(3MLIB), mlib_ImageCon‐
vMxN(3MLIB), mlib_ImageConvMxN_Fp(3MLIB), mlib_ImageConvMxNIn‐
dex(3MLIB), mlib_ImageConvolveMxN_Fp(3MLIB), mlib_ImageSConv3x3(3MLIB),
mlib_ImageSConv3x3_Fp(3MLIB), mlib_ImageSConv5x5(3MLIB),
mlib_ImageSConv5x5_Fp(3MLIB), mlib_ImageSConv7x7(3MLIB),
mlib_ImageSConv7x7_Fp(3MLIB), mlib_ImageSConvKernelConvert(3MLIB),
attributes(5)SunOS 5.10 2 Mar 2007 mlib_ImageConvolveMxN(3MLIB)
