Evaluation of machine translation

Machine Translation (MT) refers to the use of a machine for performing translation task which converts text or speech from one Natural Language (NL) into another Natural Language. Machine Translation is an important technology for localization, and is particularly relevant in a linguistically diverse country like India. The evaluation of the sentences or a corpus of sentences translated with the help of machines by comparing it with the sentences or a corpus of sentences translated by humans is known as Machine Translation Evaluation. Evaluation of Machine Translation (MT) has historically proven to be a very difficult exercise. Traditionally, MT evaluation has been performed by human judges. In recent times, automatic evaluation methods have become popular. A lot of research is still going on in the same field. In this paper, we are discussing some of the algorithms developed by various researchers that are used for the automatic evaluation of Machine Translation.