Hi Ruhallah Ahmadian

Image segmentation is a step of image processing. And clustering is a approach you can use for segmentation. So, clustering based segmentation can be a topic for your research.

Best regards.

For imaging processing, there are several topics, like image segmentation, feature extraction, classification. Clustering may work as a classification or visualization. You may think the image related project, image preprocessing and clustering

data stream clustering is the most important topic in big data mining.

Data stream clustering by divide and conquer approach based on vector model

I agree with prof. Madjid

Computer vision research on autonomous vehicle (Self-driving car) is recent trend and probably a door of new revolution. It essentially depends on segmentation, object recognition, object tracking, etc. My suggestion is to choose object recognition and object tracking as your Thesis topic.