Content-type: text/html Man page of mlib_ImageAffine_Fp

mlib_ImageAffine_Fp

Section: mediaLib Library Functions (3MLIB)
Updated: 2 Mar 2007
Index Return to Main Contents
 

NAME

mlib_ImageAffine_Fp - image affine transformation  

SYNOPSIS

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

mlib_status mlib_ImageAffine_Fp(mlib_image *dst, const mlib_image *src,
    const mlib_d64 *mtx, mlib_filter filter, mlib_edge edge);

 

DESCRIPTION

The mlib_ImageAffine_Fp() function does affine transformation on a floating-point image according to the following equation:

xd = a*xs + b*ys + tx
yd = c*xs + d*ys + ty

where a point with coordinates (xs, ys) in the source image is mapped to a point with coordinates (xd, yd) in the destination image.

The data type of the images can be MLIB_FLOAT or MLIB_DOUBLE.

The width and height of the destination image can be different from the width and height of the source image.

The center of the upper-left corner pixel of an image is located at (0.5, 0.5).  

PARAMETERS

The function takes the following arguments:

dst

Pointer to destination image.

src

Pointer to source image.

mtx

Transformation matrix. mtx[0] holds a; mtx[1] holds b; mtx[2] holds tx; mtx[3] holds c; mtx[4] holds d; mtx[5] holds ty.

filter

Type of resampling filter. It can be one of the following:

MLIB_NEAREST
MLIB_BILINEAR
MLIB_BICUBIC
MLIB_BICUBIC2

edge

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

MLIB_EDGE_DST_NO_WRITE
MLIB_EDGE_DST_FILL_ZERO
MLIB_EDGE_OP_NEAREST
MLIB_EDGE_SRC_EXTEND
MLIB_EDGE_SRC_PADDED

 

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 TYPEATTRIBUTE VALUE

Interface StabilityCommitted

MT-Level

 

SEE ALSO

mlib_ImageAffine(3MLIB), mlib_ImageAffineIndex(3MLIB), mlib_ImageAffineTransform(3MLIB), mlib_ImageAffineTransform_Fp(3MLIB), mlib_ImageAffineTransformIndex(3MLIB), mlib_ImageSetPaddings(3MLIB), attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:38:14 GMT, October 02, 2010