Hi Sanjay,

If you are looking for a relatively simple method, you may use the phase correlation method. That method gives fairly good results for global motion estimation. See https://en.wikipedia.org/wiki/Phase_correlation or a video processing book such as Video Processing and Communications by Y.Wang et al. 

If you are looking for a more accurate and robust method, see, for example, the IEEE TIP paper "Efficient, robust, and fast global motion estimation for video coding".

Thanks Edussooriya for your support. 

Hello Sanjay,

You can visit my paper,

https://www.researchgate.net/publication/281445770_Edge_detection_based_motion_tracking_in_video_surveillance

may be it is useful to you.

Conference Paper Edge detection based motion tracking in video surveillance

Thnaks Anupam....

This could help you:

http://iopscience.iop.org/article/10.1088/1741-2552/aacf45/pdf

http://www.open-ephys.org/bonsai/