You can take a look at research groups of varios universities. 

Also check out the proceedings of International Conf. on Image Processing(ICIP)

Dear Raza, I would suggest that you visit websites of journals that focus on Image processing and download recent publications. This publications could provide you with information on the state-of-the-heart topics in Image processing.

For instance:

1. IEEE Transactions on Image Processing

2. Computer Vision, IET

3.IEEE Transactions on Multimedial

4. Journal of Real-Time Image Processing, and

5. Journal of Graphics, Vision and Image Processing

Good luck

I'm seeing around a lot of combination deep learning and image processing techniques.