Content-type: text/html Man page of mlib_ImageZoomTranslateTable

mlib_ImageZoomTranslateTable

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

NAME

mlib_ImageZoomTranslateTable - zoom, with translation, with table-driven interpolation  

SYNOPSIS

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

mlib_status mlib_ImageZoomTranslateTable(mlib_image *dst, 
    const mlib_image *src, mlib_d64 zoomx, mlib_d64 zoomy, 
    mlib_d64 tx, mlib_d64 ty, const void *interp_table, 
    mlib_edge edge);

 

DESCRIPTION

The mlib_ImageZoomTranslateTable() function will enlarge or minify the source image by the X and Y zoom factors, with translation. It uses a table, interp_table, to do interpolation.

It uses the following equation for coordinate mapping:

xd = zoomx*xs + tx
yd = zoomy*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_BYTE, MLIB_SHORT, MLIB_USHORT, or MLIB_INT.

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.

zoomx

X zoom factor. zoomx > 0.

zoomy

Y zoom factor. zoomy > 0.

tx

X translation.

ty

Y translation.

interp_table

Pointer to an interpolation table. The table is created by the mlib_ImageInterpTableCreate() function.

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_EXTEND_INDEF
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_ImageInterpTableCreate(3MLIB), mlib_ImageInterpTableDelete(3MLIB), mlib_ImageZoomTranslateTable_Fp(3MLIB), mlib_ImageZoomTranslate(3MLIB), mlib_ImageZoomTranslate_Fp(3MLIB), attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 02:38:26 GMT, October 02, 2010