Feature extraction of image using gabor filter

[software shreekrishna]

Hello,
             I am developing billingual OCR script detection using gabor filter. I am using Accord.net framework  , I used gabor filter from  Accord and it transformed image into gabor image, but I need feature extraction using  gabor filter which can be used to train nural network  to identify language of word. Please tell how I can extract feature of image using gabor filter.
Just like this http://www.primaresearch.org/ICDAR2003/Papers/0178_682_ma_huanfeng.pdf
Thanks
Anil