Extract original image from watermarked image

I would like to extract the original image from the marked image based on this code which hides a text in an image

Help me

%%%% code to insert text in image

I=imread('path folder');
imshow(I);
a=double(I);
s=a;
texte=' adhjadhjhjahjhjazdhbj'
k=0;
if size(texte)<size(a,1)*size(a,2)
    for j=1:size(a,2)
        for i=1:size(a,1)
            k=k+1;
            if k<size(texte,2)
                s(j,i,1)=floor(a(j,i,1)/16)*16+texte(k)-16*floor(texte(k)/16);
                s(j,i,3)=floor(a(j,i,3)/16)*16+floor(texte(k)/16);
            end
            if k==size(texte,2)+1
                s(j,i,1)=floor( a(j,i,1)/16)*16+128-16*floor(128/16);
                s(j,i,3)=floor( s(j,i,3)/16)*16+floor(128/16);
               
            end
            
        end
    end
else
    print('Texte trop long');
end
ba=uint8(s);

imwrite(ba,'path file');
imshow(ba);

%%% extract text from marked image

imo=imread(path folder);
imshow(imo);
text=[];
i=1;j=1;
a=double(imo);
part1=a(j,i,1)-16*floor(a(j,i,1)/16);
part2=a(j,i,3)-16*floor(a(j,i,3)/16);
textp=double(part2*16+part1);
while(textp~=128)
    text=[text,textp];
    i=i+1;
    if i>size(a,1)
        j=j+1;
        i=1;
    end
     part1=a(j,i,1)-16*floor(a(j,i,1)/16);
     part2=a(j,i,3)-16*floor(a(j,i,3)/16);
    textp=part2*16+part1;
end
text=char(text);
print(text);

This code work perfectly!!!!

Help me now to extract original image from marked image.

Thks

Answer 1

[Image Analyst]

See attached example that hides an image in another image and then recovers it.