NAME
haar_transform - performs a fast Haar transform
SYNOPSIS
#include "CVIPtools.h"
#include "CVIPimage.h"
#include "CVIPdef.h"
#include "CVIPtransform.h"
Image *haar_transform(Image *in_Image, int ibit, int
block_size)
<in_Image> - pointer to an Image structure
<ibit> - 1 (forward transform) or 0 (inverse transform)
<block_size> - block size (4,8,16,...largest_dimension/2)
PATH
$CVIPHOME/TRANSFORMS/haar.c
DESCRIPTION
This function performs a fast Haar transform. The image must
have dimensions that are a power of two.
TYPES AND CONSTANTS
None
RETURN VALUES
A transformed image
HISTORY
History information recorded: None
EXAMPLE
#include <CVIPtoolkit.h>
#include <CVIPimage.h>
#include <CVIPconvert.h>
#include <CVIPview.h>
#include <CVIPtransform.h>
#define VIEWER "picture"
#define VIDEO_APP "SunVideo &"
void main()
{
Image *cvipImage;
IMAGE_FORMAT format;
char *inputfile,*outputfile;
setDisplay_Image(VIEWER, "Default");
print_CVIP("\n\t\tEnter the Input File Name: ");
inputfile =(char *) getString_CVIP();
format = getFormat_CVIP(inputfile);
cvipImage = read_Image(inputfile, 1);
view_Image(cvipImage, inputfile);
free(inputfile);
/* the following call performs a haar_transform on the
input image with block size equal to 8 */
cvipImage = haar_transform(cvipImage, 1,8);
print_CVIP("\n\t\tEnter the Output File Name: ");
outputfile = getString_CVIP();
view_Image(cvipImage,outputfile);
write_Image(cvipImage,outputfile,CVIP_NO,CVIP_NO,format,1);
free(outputfile);
}
SEE ALSO
libtransform
AUTHOR
Copyright (C) 1996 SIUE - by Scott E. Umbaugh and Arve
Kjoelen.