# MATLAB: How to extract a watermark in matlab

extractionImage Processing Toolboxwatermark

the matlab code which i have used is:-
clear all; close all; clc;bit=input('Please define which bit you want to extract from? (8 | 7 | 6 | 5)'); image=imread('C:\Users\user\Desktop\wm pictures\lena.jpg');imshow(image);[row,col]=size(image);Hlength=row*col;i=1;j=1;k=1; row=128;col=384;wmimage=imread('C:\Users\user\Desktop\wm pictures\cameraman.jpg');wm=dec2bin(wmimage);Wlength=row*col*8;host=dec2bin(image);cnt=0;while i <= Hlength      cnt=cnt+1;      if cnt>Wlength          break;      end      wm(j,k)=host(i,bit);      k=k+1;      if k>8          k=1;          j=j+1;      end     i=i+1;  endwm1=bin2dec(wm);wm2=reshape(wm1,row,col);wmimage(1:row,1:col)=wm2(1:row,1:col);imwrite(wmimage,'extracted.jpg');imshow(wmimage);
This code is not giving the desired result.
If anyone can give me some other codes for extraction in spatial domain then please help me out.
thank you