Digital Image Watermarking...help!!!

[qmriso]

Hello, does anybody have any code for digital image watermark? I have to add a binary watermark ( which has to be invisible ) in a greyscale image. The algorithm i need to use is the LSB. I was given a watermark sequence and the greyscale image. I attached them. Thank uuuuu

 

[trunjo]

hi,
here is some matlab code

clear
close all
x=imread('lena512.bmp'); %greyscale image
y=imread('hide.bmp'); %binary image
y1=bitget(uint8,1); %this is LSB of binary image y (all other bits of image y are equal 0)
x1=bitset(x,1,y1); %puting LSB bits of image y into LSB bits of image x
subplot(221),imshow(x);title('Original image')
subplot(222),imshow(y1,[]);title('Binary image')
subplot(223),imshow(x1);title('Greyscale+binary image')
subplot(224),imshow(bitget(x1,1),[]);title('LSB of Greyscale+binary image')

 

[zzoorroo]

hi
i have the same project in my final year can any one support me with algorithm and techniqus to use it (matlab program) tutorial.
thanks

 

[afifayounus]

and mine is almost the same, watermark will be binary image and original image is grayscale, bt i will be using discrete wavelet transform, the image will be decomposed through dwt and then watermark will be embedded into the most approximation part of the imge. now i hav found the function of dwt in matlab for 2 level decomposition, bt wht abt 3rd level decomposition??? any help will be appriciated. as i am new to matlab , and completely relying on internet and help...

 

[snehal.laghate]

clear
close all
x=imread('lena512.bmp'); %greyscale image
y=imread('hide.bmp'); %binary image
y1=bitget(uint8,1); %this is LSB of binary image y (all other bits of image y are equal 0)
x1=bitset(x,1,y1); %puting LSB bits of image y into LSB bits of image x
subplot(221),imshow(x);title('Original image')
subplot(222),imshow(y1,[]);title('Binary image')
subplot(223),imshow(x1);title('Greyscale+binary image')
subplot(224),imshow(bitget(x1,1),[]);title('LSB of Greyscale+binary image')


from the code suggested above the following error occurs in matlab
I downloaded lena512.bmp pic & saved in work folder of matlab.on running the code mentioned lena512.bmp doesnot exit is wat appears in matlab window.do comment on this

 

[Maheru]

hi people...
i need help on image watermarking relating DCT and then taking IDCT of that image....
can anyone help me in that code ... please its urgent (
this is my final year project anf have one month left...
have been working on the dsp kit but its not working...as i dont know about C6713...

---------- Post added at 07:58 ---------- Previous post was at 07:57 ----------

hi people...
i need help on image watermarking relating DCT and then taking IDCT of that image....
can anyone help me in that code ... please its urgent (
this is my final year project anf have one month left...
have been working on the dsp kit but its not working...as i dont know about C6713...

and that code should be 2006 matlab compatible...

 

[vishal8990]

hi,
here is some matlab code

clear
close all
x=imread('lena512.bmp'); %greyscale image
y=imread('hide.bmp'); %binary image
y1=bitget(uint8,1); %this is LSB of binary image y (all other bits of image y are equal 0)
x1=bitset(x,1,y1); %puting LSB bits of image y into LSB bits of image x
subplot(221),imshow(x);title('Original image')
subplot(222),imshow(y1,[]);title('Binary image')
subplot(223),imshow(x1);title('Greyscale+binary image')
subplot(224),imshow(bitget(x1,1),[]);title('LSB of Greyscale+binary image')

plz can u help me with the same project... mine is digital watermarking with dwt using LBG algorithm ... i have already generated codebook of host image using LBG algorithm.. what to do next ?? plzz help.. its really urgent !!