IWALHAD_CVIP

iwalhad_cvip() - perform inverse Walsh/Hadamard transform.

SYNTAX
Reference
Example
CREDITS

SYNTAX

[ img ] = iwalhad_cvip( input_img, block_size )

Input Parameters Include:

input_spect - The Walsh/Hadamard spectrum of an image, obtained by walhad_CVIP().

block_size - Should be a power of 2 or [].if empty,then functions finds the nearest power of 2 and zero pad the image,to that block size.Any other value smaller than image size will partiotion the image to windows of that block size and inverse WHT will be calculated separately in each window.

Output Parameter Include:

img - The original image with the given spectrum.

Reference

1. Scott E Umbaugh. DIGITAL IMAGE PROCESSING AND ANALYSIS: Applications with MATLAB and CVIPtools, 3rd Edition.

Example

% Read image

 input_img = imread('Butterfly.tif');

% Block size

 block_size = 4;

% Calling  walhad function

 spect = walhad_cvip(input_img,block_size);

% Calling inverse walhad function

 v = iwalhad_cvip(spect,block_size);

 img = remap_cvip(v);

% Display input image

 figure;imshow(input_img);title('Input Image');

% Display output image

 figure;imshow(remap_cvip(log(1+abs(spect))),[]);title('Output Transformed Image');

 figure;imshow(img,[]);title('Output Inverse Transformed Image');

IWALHAD_CVIP

Contents

SYNTAX

Reference

Example

CREDITS