Tennis ball picking robot

http://people.ece.cornell.edu/....land/courses/ece4760
Our project aims to devise an easy-to-use, low-cost autonomous ball-picking device that helps pick up tennis balls, or perhaps any other balls of similar weight and shape, over an enclosed tennis court area. The general idea is that this device will sweep through a tennis court in a smart fashion within a reasonable amount of time. A complex ball-search algorithm will be implemented to eventually pick up all tennis balls within an enclosed area with fairly high walls. The picker implements a rotary blade technology that pushes a tennis ball up half-cylinder structure and over to the basket where it is stored.