The brain tumor turns into cancer it becomes life threatening. It is necessary to detect the location, type and size of
tumor. It is an uncontrolled growth of tissues in human brain which limits the functioning of brain. Nowadays different types of
techniques are used such as X- ray, CT scan, MRI, PET. It is possible with advancement of machine learning (ML) and image
processing (IP). In this paper the study of different methodology to detect brain tumor by using image processing. By analysing
several research paper that provides gist of technologies which can be used to predict brain tumor.