@api.multi
def resize_image(self):
  for record in self:
    Image.open(self.foto1).resize((800, 600),Image.ANTIALIAS).save(self.foto1, quality=100)

File "/opt/odoo/addons/asset/asset.py", line 209, in resize_image
    Image.open(self.foto1).resize((800, 600),Image.ANTIALIAS).save(self.foto1, quality=100)
IOError: [Errno 36] File name too long: '/9j/4AAQSkZJRgABAQEASABIAAD/7QFKUGhvdG9zaG9wIDMuMAA4QklNBAQAAAAAAREcAVoAAxslRxwCAAACAAIcAhkAJkFGLVMgR