How to process this picture and remove email from it?

Question

Python

There is this picture:

I process it with code:

import os
os.chdir('D:/python27/lib/site-packages/pytesser')
try:
    import Image
except ImportError:
    from PIL import Image
from pytesser import *
im = Image.open('q.gif')
im = im.convert('L') 
text = image_to_string(im)
print text

Result: empty string, but other pictures are processed fine
For example:

What's the problem with the first picture?