Over the years I have found that many students who propose their own projects using computer vision have been very successful – probably because they are strongly motivated by the subject matter. So if you have an idea for a project in a field which interests you please contact me. The biggest issues are usually makes sure that the scope is appropriate as well as checking what work has already been done in the area.
Details of how I run projects are available at https://www.scss.tcd.ie/Kenneth.Dawson-Howe/Projects/project_details.php