Image and Video Processing - From Mars to Hollywood with a Stop at the Hospital is the course offered by Guillermo Sapiro at Coursera. After a long time, I voluntarily took a course and finished it. I didn't pay for the course and so, I won't get a certificate. But I have this, and the course completion recorded in my accomplishments in coursera.
It was wonderful course, I learnt about digital signal processing, and image transformations.