Interactive Video and Camera Position for Virtual Environment

In this work we address the extended interaction with video in virtual walkthrough. We present an algorithm for automatic extraction of camera positions during the video recording. The algorithm creates a b-spline curve, which represents the camera movement. We propose using this curve as an interactive element. The user can with help of this element change his position in video file according to his position in the virtual walkthrough and not only according to time. With this element we extend the standard interaction with video and also the user has additional information about his position during the presentation. We also present an algorithm for object tracking inside video and creation of object representative. We are using this representatives as an information for the users about additional information for selected object. We extended the interaction within the video and the user can view other information on demand.