Content-type: text/html Man page of mlib_ImageFourierTransform

mlib_ImageFourierTransform

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

NAME

mlib_ImageFourierTransform - Fourier transform  

SYNOPSIS

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

mlib_status mlib_ImageFourierTransform(mlib_image *dst,
    const mlib_image *src, mlib_fourier_mode mode);

 

DESCRIPTION

The mlib_ImageFourierTransform() function performs a two-dimensional Fourier transformation. The source and destination images must be the same type and the same size. The data type of the images can be MLIB_BYTE, MLIB_SHORT, MLIB_USHORT, MLIB_INT, MLIB_FLOAT, or MLIB_DOUBLE. The height and width of the images must be some positive power of 2 (but they do not have to be equal).

They can have 1 or 2 channels. If the source image has just one channel the imaginary parts are assumed to be zero. If the destination image has just one channel, then it is assumed that the imaginary parts of the output can be discarded. But in case both source and destination images are one-channel images, then MLIB_FAILURE is returned.

The predefined modes used in the image Fourier transform function are as follows:

ModeDescription

MLIB_DFT_SCALE_NONEForward DFT without scaling
MLIB_DFT_SCALE_MXN
MLIB_DFT_SCALE_SQRT
MLIB_IDFT_SCALE_NONE
MLIB_IDFT_SCALE_MXN
MLIB_IDFT_SCALE_SQRT

 

PARAMETERS

The function takes the following arguments:

dst

Pointer to destination image.

src

Pointer to source image.

mode

Mode of the transform.

 

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

attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 02:38:18 GMT, October 02, 2010