How to enhance contrast for this image

[aspenlin]

For images like this one (images with text of low contrast), what parameters should I change for a better result?

I tried the default values with dhe.py and ying.py, it did help enhance the contrast a little bit but not much. I'm wondering whether the author knows better about how to tune some parameters in the program to get a better result for images like the one I provided.

Thank you very much for the code and for your help!

[AndyHuang1995]

Maybe deblur method is what you actually need ?

Hi @AndyHuang1995 i got this error.. how to fix this

Traceback (most recent call last):
File "dhe.py", line 109, in
main()
File "dhe.py", line 102, in main
img_name = sys.argv[1]
IndexError: list index out of range