how can xor first pixel with second and second with third and so on (for binary image)

image=imread('lena.jpg');

bin_image=dec2bin(image);

 i have attached the pdf of my question kindly review

[KALYAN ACHARJYA]

What do you mean by the second pixel...?

[juveria fatima]

kindly go through the pdf u will understand what i want to do bitxor(first column with second column) then bitxor(third with fourth)as follows for full image and then atlast i have to get back my original image

Answer 1

[KALYAN ACHARJYA]

image=imread('image_name.image_format'); %e.g. im1.jpg
bw_image=im2bw(rgb2gray(image));
[row colm]=size(bw_image);
for i=1:row-1
    for j=1:colm-1
        new_image(i,j)=xor(bw_image(i,j),bw_image(i+1,j+1));
    end 
end
imshow(c);

[juveria fatima]

how can i get back the original image

[juveria fatima]

thank you very much sir ,i got it

[KALYAN ACHARJYA]

@Fatima My Pleasure

Recommended: Use vectorization to avoid loop

[juveria fatima]

can i get back the rgb image

[Guillaume]

can i get back the rgb image

Of course not, the first step binarises the image converting all colours to either black or white. Once the colour information has been removed there's no way to reinvent it.

You've accepted the answer so I assume that it does what you need but from the code in your question, it looks like what you call a binary image is not what we call a binary image (an image with only two colours) but the binary representation of a colour image (a step that is a complete waste of time if all you want to do is xor bits).

[Guillaume]

Note that the exact same result as the accepted answer can be achieved a lot faster (no loop) and with a lot less code with:

raw_image = imread('image_name.image_format'); %do not use image as a variable name, it's an often used matlab function
bw_image = im2bw(rgb2gray(raw_image));
new_image = xor(bw_image(1:end-1, 1:end-1), bw_image(2:end, 2:end));

[juveria fatima]

oh thank you i was trying it

i have a doubt that instead of xor on binary image can we xor rgb image or gray image and process it

[KALYAN ACHARJYA]

@Fatima XOR for logical data (bit value) only 0 or 1, not for RGB and gray image

[juveria fatima]

thank you, now am cleared with the doubts finally

[Guillaume]

xor is a logical operator. The matching bit operator is bitxor. If you wanted to xor bits, then a) you shouldn't have accepted the answer as it doesn't do that at all and b) you need to clarify which bits you want to xor with which bits. I'm not sure whether you want to xor together bits of the same pixel or corresponding bits of neighbouring pixels.

[juveria fatima]

@Guillaume i am sorry for silly mistakes actually am new to matlab , | | | I'm not sure whether you want to xor together bits of the same pixel or corresponding bits of neighbouring pixels.||| i actually want to xor the corresponding pixels value and at last i want to recover the image please go through the pdf file once i wrote my problem clearly

[Guillaume]

I'm afraid it's still not very clear what you want. Suppose you have a 4 column image. How many columns has the resulting image? Just 2 (first column is column 1 and 2 xor'ed, 2nd column is column 3 and 4 xor'ed)? How can you recover the original image from that?

Also are the rows xor'ed?

Giving us a concrete example would be a lot more useful than pdfs. E.g. given the image:

img = [208    33   162    72
       231   233    25   140]

what is the desired result?

[juveria fatima]

rgb_image_1 = imread('baboon.tiff');
q=dec2bin(rgb_image_1);
now to this image(q) i have to do bitxor pixel wise and recover the baboon image back

[juveria fatima]

@Guillaume here is the link where i wrote the problem clearly

https://in.mathworks.com/matlabcentral/answers/417583-i-have-to-do-bitxor-on-image-pixel-wise

[Abubakar Abba]

Why imshow(c);? I didnt see any variable c from the code. i think it should be imshow(new_image)