swt requires wavelet tool ... can i run it without the tool

i=imread('0.jpg');
i=i(1:400,1:400,:);
[a,b,c,d]=swt2(i,4,'db4')
aw=zeros(size(a));
aw(:,:,2:3,4)=a(:,:,2:3,4);
r=iswt2(aw,0*b,0*c,0*d,'db4');
r2=(r-min(r(:)))/(max(r(:))-min(r(:)));
d=image(r2)
imshow(d)

Answer 1

[Manikanta Aditya]

The swt2 and iswt2 functions you’re using are part of the Wavelet Toolbox in MATLAB. These functions are used to perform the stationary wavelet transform (SWT) and its inverse. The SWT is a wavelet transform algorithm that does not downsample the signal, making it more suitable for certain applications, particularly in image processing.

If you don’t have the Wavelet Toolbox, you won’t be able to run these functions directly.

[Walter Roberson]

Unless you write your own swt2() and iswt2() -- which would be non-trivial.