I cant get the original Image ('claudia.tif') from Decryption code…what shoud be written to get it?..please I neet it in my study.

Encryption code

cover = imread('mouse.tif'); 
originalImage = imread('claudia.tif');
figure(1), imshow(cover); title('Cover Image');figure(2), imshow(originalImage);title('original Image'); 
cover=double(cover);originalImage=double(originalImage);
%imbed = no. of bits of message image to embed in cover image
imbed=2;
originalImageshift=uint8(bitshift(originalImage,-(8-imbed)));
coverzero = cover;
for i=1:imbed
coverzero=bitset(coverzero,i,0);end
cove=uint8(coverzero);
stego = imadd(cove,originalImageshift);
figure(3),imshow(stego);title('steganograhy image'); 
imwrite(stego,'steganograhy.tif');

Decryption code

    cover = imread('mouse.tif');
stego = imread('steganograhy.tif');
figure(1), imshow(cover); title(' Cover Image'); 
figure(2), imshow(stego);title('stegnography Image'); 
cover=double(cover);stego=double(stego);
ori_image = imsubtract(stego,cover);
figure(3),imshow(ori_image);title('original image');
imwrite(ori_image,'orignalimage1.tif');

[hudof najeeb]

I used this program to hide image in image using lsb (steganography ) .First,I hide the original image in cover image using Encryption code ,second,I did decryption code but I cant get the original image which was hidden....how can I repair it? what shall i do to get the original image from decryption code? can anyone help me please