The Ibar: a Perspective-based Camera Widget Wucse-2004-32 the Ibar: a Perspective-based Camera Widget

We present a new widget, the IBar, for controlling all aspects of a perspective camera. This widget provides an intuitive interface for controlling the perspective distortion in the scene by providing single handles that manipulate one or more projection parameters simultaneously (e.g., distance-to-object and lens aperture) in order to create a single perceived projection change (increasing the perspective distortion without changing the scene size). We demonstrate that novice users more easily learn how to manipulate the camera using the IBar.