【愚公系列】2021年11月 攻防世界-进阶题-MISC-047(low)

# lsb隐写
import PIL.Image as Image
img = Image.open('low.bmp')
img_tmp = img.copy()
pix = img_tmp.load()
width,height = img_tmp.size
for w in range(width):
   for h in range(height):
      if pix[w,h]&1 == 0:
         pix[w,h] = 0
      else:
         pix[w,h] = 255
img_tmp.show()