Snippet taken from main.py with a focus on LSB hiding function

hide_data.py

start_pixel = get_num_rand(used_pixels, num_of_pixels)
    while byte_written != len(input_data):
        bit_i = 0
        while bit_i != 8:
            px = matrix[start_pixel]
            # colors: Red, Green and Blue
            for c in range(conf[0], conf[1]):
                if bit_i == 8:
                    break
                # Because of Least Significant Bit, we want to modify the last bit of every color
                color = matrix[start_pixel][c]
                lsb = color&1
                # Here, we just use bit manipulation to modify the last bit of the color number
                if lsb != int(binary_enc[(byte_written*8)+bit_i]):
                    color = color>>1 # erase last bit
                    color = color<<1 # zero last bit
                    if lsb == 0: # it means that byte[bit_i]=1, so I need to encode 1
                        color = color|1
                    matrix[start_pixel][c] = color
                bit_i += 1
            start_pixel = get_num_rand(used_pixels, num_of_pixels)