Camera Motions

Abstract

SynonymsImage device movementsDefinitionCamera motions are defined as set of camera movements generated by users in both fixed and mobile situations.Estimating camera motion parameters from a video sequence constitutes one of the central themes in computer vision and multimedia. These parameters are widely used to efficiently store and manage large volumes of video data as references to particular video segments, and to track objects in digital video. Figure 1 depicts typical types of camera motions. Translations of the camera along the horizontal and vertical axes of the imaging plane are called track and boom, respectively. Translation in the direction of the optical camera axis is called dolly. Pan refers to the turning around the vertical axis, whereas tilt refers to the turning around the horizontal axis. The camera rotation around the optical axis is called roll. In addition to the above motion types, many cameras can also change the focal length or zoom.