import os, sys
import Image

hslen=1000
hswid=800
hsi=5
hsj=4

hsi=hsi
hsj=hsj
hslen=hslen/hsi;
hswid=hswid/hsj;

for infile in sys.argv[1:]:
  for i in range(0,hsi):
    for j in range(0,hsj):
      outfile = os.path.splitext(infile)[0]+str(i)+str(j)+".jpg"
      if infile != outfile:
        try:
            im = Image.open(infile)
            box = (i*hslen,j*hswid,(i+1)*hslen,(j+1)*hswid)
            region=im.crop(box)
            im2 = Image.new("RGB", (hslen, hswid), "white")
            im2.paste(region,(0,0))
            im2.save(outfile, "JPEG")
        except IOError:
            print "cannot create thumbnail for", infile