On the balcony of the Farmgate Restaurant, we ate rich fish soup and got a bird’s-eye view of butchers preparing joints at a stall below.

In the application of mini-micro-robot visual perception, there is a need for fish-eye lenses for capturing wide field of view for navigation.

Novel techniques, such as a fish-eye lens used to obtain a 360-degree field of view without the need of focus adjustment, have recently been investigated and proved very useful in mobile robots.