B. Therapeutic classroom
To undergo therapeutic scenarios appropriate classroom preparation with necessary multimedia equipment is needed. There are four types of equipment used in the proposed system: processing units, cameras, presentation tools, lighting, and elements of the production. Cameras are connected to the processing units responsible for visual data analysis. Processing units could also handle display management tasks and speaker service in scenarios requiring the use of sounds. During the session with the child virtual reality could be displayed in various ways (e.g. LCD screens, virtual reality helmets) but to assure low cost back projection screens and multimedia projectors seem to be promising solution. Back projection eliminates glaring the camera by the projector light as well as screening the projector light by the child.