Designers often spend a lot of time to find the font used in images or websites. Considering you know where to find style sheet it is easy to find font type in website but doing that on image is damn tough.
WhatTheFont is a font identifying service which can even find the font type or family from images if they are not to bad to read. All you need to do is upload an image to this service and sit back for character identification.
This service identifies certain areas where your response is taken to give correct result. For example the image you see above is the screen where you need to tell the service which alphabet is that. Done that you get the best matching fonts which you can manually check confirm. Check out What The Font | Also check out the Visual Font Search Engine