First, I want to divide binary image into 8 by 8 block.Second I want to perform rowise logical AND(1st AND 2nd,2nd AND 3rd .....so on ) and from that results i want to do XOR.Please help me with matlab code.

suppose i have 8 rows ,i need to do logical AND for first and second row,then second and third .....then neglect same vectors using unique,from that remaining vectors i want to do overall XOR.

Answer 1

[Walter Roberson]

ur = unique(block(1:end-1) | block(2:end), 'rows');
uxor = mod(sum(ur,1),2);

You might notice that I did not use explicit xor() here. When you have a vector of binary values, xor is 0 if the sum of the vector is even, and xor is 1 if the sum of the vector is odd. (For xor, 0 do not change the result, but every 1 toggles the result, so even numbers of 1's toggle the result back to 0 and odd numbers of 1's leave it at 1)

[kaavya subramani]

Thanks sir,i am a beginner,i want to use these code in blockproc.i.e l=blockproc(pp,[8 8],?).How to replace '?' by your answer.I am extremely sorry to ask this question.But please help me.

[Walter Roberson]

function uxor = feature_xor(block_struct)
  block = block_struct.data;
  ur = unique(block(1:end-1) | block(2:end), 'rows');
uxor = mod(sum(ur,1),2);
end

together with

I = blockproc(pp, [8 8], @feature_xor);

[kaavya subramani]

Thanks you sir,But i am getting error,the dimension is 342 by 421,am i want to resize it?

[Walter Roberson]

I = blockproc(pp, [8 8], @feature_xor, 'PadPartialBlocks', true);

but you need to decide what you want to have happen when you divide your image that is not a multiple of 8 wide or tall, into blocks that are 8 wide and tall. What do you want to have happen on the border blocks?

[kaavya subramani]

i need to have both wide and tall on the border blocks sir