Vertical and horizontal shooting range - the mystery of the picture

Zoom in , It is not difficult to see that there is a dot matrix behind the picture

stegsolve Look at the pictures through another channel , It is certain that the lattice is hidden

Every time 20 A point has an information point , Place the remaining pixels in red

from PIL import Image

img = Image.open(r'.\ Industrial control \ The mystery of pictures \under_your_nose.jpg')

img = img.convert('RGB')
x, y = img.size

for i in range(x):
    for j in range(y):
        color = img.getpixel((i, j))
        if (i % 20 != 0) or (j % 20 != 0):
            color = (255, 0, 0)
        img.putpixel((i, j), color)

img.save(r'.\ Industrial control \ The mystery of pictures \a.jpg')

Found under the green channel flag