Image Processing or Neural Networks
Hi Praveen, I do not know about these topics, but I do know about research. With any kind of research you need to READ enough articles to know what is going on in the field. Which of these topics NEEDS questions answered. You have to do some research that will improve people's practice of CS, save money, improve performance, etc.
So, what kinds of research studies have you read? Are you required to conduct original research?
You should go to "google scholar" and search for these 2 terms, one at a time. Read the most recent articles about them, and write a sentence every time you find an interesting piece of information.
This will take a lot of time, but it can be enjoyable if you really are interested.
Please read 5 studies that are interesting to you! That is the way to start.
You can use Google Scholar or your school library database.