Spraying over noise

Spraying

Spraying over noise which contains a hash code

import numpy as np
import imageio

np.random.seed(X) # set integer of message you want to cipher

data = np.random.randint(0, 255, size=(1240, 1748, 3))

# optionally turn it black white by coping first dimension (color RED) to the other colors (GREEN, BLUE)
data[:, :, 1] = data[:, :, 0]
data[:, :, 2] = data[:, :, 0]

imageio.imsave('data.png', data)