0 个投票

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')

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 采纳的回答

KSSV
KSSV 2017-5-12

1 个投票

Your cameraman.jpg image is already a gray image, you are trying to convert it to gray using rgb2gray, that's why error. Try this:
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
if size(I2,3)==3
H1=rgb2gray(I2); %convert it into gray scale image
else
H1 = I2 ;
end
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')

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Afeza Ajirah
Afeza Ajirah 2017-5-12
Sir!! You are the bestt, thank you so much for helping me out! May God bless you thank you sir

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