1. A method for collision avoidance for a machine, comprising: detecting an obstacle with an obstacle detection system and generating a corresponding signal, the obstacle detection system including an operator input device; providing an obstacle detection warning in response to the signal, wherein providing the obstacle detection warning includes displaying a graphic on a first portion of a display; capturing images of the obstacle with a camera and displaying the images on a second portion of the display; and determining with a controller whether the operator input device has been activated in response to the obstacle detection warning.