skew angle for an image

I have an image i.e am working o tamil character extraction,in that each letter is represented by an image,in which i want to find the skew angle,is it possible,plz help

i have uploaded the image....

http://imgur.com/wq6Yy-original image

http://imgur.com/rznyq-slanting image

i want to find the skew anlge for second image,is it possible,please help