using pillow to encode and decode files into images

dec.py

import sys
from PIL import Image

try:
	ifile = sys.argv[1]	
	ofile = sys.argv[2]	
except:
	print ('usage: dec.py [input file] [out file]\n\n')

img = Image.open(ifile)
fbs = list(img.getdata())

spixel = fbs[0]
leng = spixel[0]*255*255 + spixel[1]*255 + spixel[2];
num = int(leng/3)+1
fbs[0] = fbs[num]

bs = []
for b in fbs:
	bs.extend(b)
bs = bs[:leng]

with open(ofile, 'wb') as f:
	f.write(bytes(bs))
	print('%d bytes extracted into %s'%(leng, ofile))

enc.py

import sys
from PIL import Image

try:
	fname = sys.argv[1]	
except:
	print ('usage: enc.py [filename]\n\n')

with open(fname, 'rb') as f:
	bs = list(f.read())
	leng = int(((len(bs)/3)+1)**0.5) + 1
	
	img = Image.new('RGB', (leng, leng))

	num = int(len(bs)/3)+1
	for i in range(num):
		val = list(bs[i*3:(i+1)*3])
		for j in range(3 - len(val)):
			val.append(0)

		img.putpixel( (i%leng, int(i/leng)), tuple(val))
	
	val = (int(len(bs)/(255**2)),
			int(len(bs)%(255**2)/255), len(bs)%255);
	print('%d bytes written into %s.png'%(len(bs), fname))
	img.putpixel((num%leng, int(num/leng)), tuple(bs[:3]))
	img.putpixel((0,0), val)

	img.save(fname+'.png')