HOW TO ENCODE AN 8BIT VALUE FROM A MATRIX

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Abirami
Abirami on 14 Aug 2014
Edited: Abirami on 15 Aug 2014
HELLO
I have generated a 256x256 matrix with an 8bit binary sequence present in each element. I wish to encode the sequence using the following scheme
A=00
B=01
C=10
D=11
i need to encode the whole matrix.please help.the matrix generated is from the following code
clc
clear all
close all
a=imread('C:\Users\Abzz\Desktop\lena.png');
imshow(a)
disp(a)
for i=1:1:256
for j=1:1:256
b{i,j,1} = dec2bin(a(i,j),8);
end
end
disp(b)
M=randint(256,256,[0,256]);
disp(M)
for k=1:1:256
for l=1:1:256
N{k,l,1} = dec2bin(M(k,l),8);
end
end
disp(N)
thanks in advance

Accepted Answer

Pratik Bajaria
Pratik Bajaria on 14 Aug 2014
Hello, Check this. I think it would work for you. It worked for me fine.
for i=1:size(b,1)
for j=1:size(b,2)
dum=0;
for k=1:2:size(b,3)
dum=dum+1;
if (b(i,j,k)*10+b(i,j,k+1))==00
test(i,j,dum)='A';
elseif (b(i,j,k)*10+b(i,j,k+1))==01
test(i,j,dum)='B';
elseif (b(i,j,k)*10+b(i,j,k+1))==10
test(i,j,dum)='C';
else
test(i,j,dum)='D';
end
end
end
end
Please let me know in case of further doubts.
Regards, Pratik
  5 Comments
Abirami
Abirami on 15 Aug 2014
sir, im not able to follow...i tried but im getting the following error
Attempted to access b(1,1,2); index out of bounds because size(b)=[256,2048,1].
Error in ==> prat1 at 20 if (b(k,l,m)* 10+b(k,l,m+1))==00
also im not able to view the result...pls help..thanks in advance

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More Answers (1)

David Sanchez
David Sanchez on 14 Aug 2014
M=randint(256,256,[0,256]);
disp(N)
N=zeros(size(M));
for k=1:256
for l=1:256
N(k,l) = str2double(dec2bin(M(k,l),8));
end
end

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