Afeza Ajirah asked . 2024-02-05

How to run this code?

Hi, i have problem on running this code due to some error. The only output is the displaying of 'original image'. Hopefully, you guys can help me fix it. Thank you so much.

error: Error in Wprocess (line 18) H1=rgb2gray(I2); %convert it into gray scale image

x=.01;

t=cputime;

I1=imread('lena.jpg');%read image

% I1=imread('mand.jpg');%read image

H=rgb2gray(I1); %convert it into gray scale image

J=imresize(H,[512 512]);%resize image into 512x512 image

J= double(J);

[M,N]=size(J);

figure,imshow(uint8 (J));title('Original image')

[Lo_D,Hi_D,Lo_R,Hi_R] = wfilters('haar');

[ca,ch,cv,cd] = dwt2(J,Lo_D,Hi_D);

[ca1,ch1,cv1,cd1] = dwt2(ch,Lo_D,Hi_D);

[U,S,V] = svd(ch1);

[m,n]=size(S);

% Copy the original Singular value

Sw=S;

I2=imread('cameraman.jpg');%read Watermark image

H1=rgb2gray(I2); %convert it into gray scale image

J1=imresize(H1,[128 128]);%resize image

[a,b]=size(ch1);

W1= double(J1);

W1=imresize(W1,[a b]);% resize the 1 watermark image

[p,q]=size(W1);

%  Watermark insertion

S=S+(x*W1);

[U_w,S_w,V_w]=svd(S);

[cs1]=[U*S_w*V'];

wing = idwt2(ca1,cs1,cv1,cd1,Lo_R,Hi_R);

wing1 = idwt2(ca,wing,cv,cd,Lo_R,Hi_R);

t1=cputime;

figure,imshow(uint8(wing1)),title('Watermarked Image')

Image Processing and Computer Vision , Image Processing Toolbox , Image Filtering and Enhancement