how to convert an image in to binary bits sequence ?

2 min readAug 8, 2023

a=imread(‘cameramen.jpg’);

b= round(a./256);
   but i got binary bits like this
   1 0 1 0 0 1 0 0 0 0
   0 0 0 1 0 1 0 1 0 0
        . 
        .
        .

   1 0 0 0 0 0 0 0 0 0 
   0 1 0 1 0 1 0 1 0 0 
        . 
        .   1 0 1 0 1 0
   0 0 0 0 0 0 but what i want is: b = (1 0 1 0 1 0 0 0 .....n)

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You question is very unclear due to imprecise language.

Are you intending to binarise the image? That is convert each pixel to a single 0 or 1, as you’ve done with your b = round(a / 256), which convert all pixels below intensity 128 to 0 and all above 127 to 1. Or as your watermarking tag and question title suggest, convert each pixel to a sequence of bits?

If the latter, the best course is actually not to do it and use matlab’s bit wise operators. This will be much faster than converting to a matrix of bits and back.

Example, replace LSB of matrix with random 0 or 1:

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