In the Thesis, we propose a mechanism to dynamically adjust video parameters in an intelligent video surveillance network. Whenever there is an alarm or network encounters congestion, we could adjust video parameters including Frames per Second (FPS), Quality, and Picture Size to adapt to network bandwidth. For examples, we can adjust FPS when an alarm exists in the surveillance system; we can adjust the Quality or Picture Size by counting the total number of video packets received per second to obtain a smooth video when network is congested To demonstrate the proposed schemes, we implement these three adjustable parameters, Quality, Picture size, and FPS on a Linux platform. To do this, we establish a new HTTP connection from a client to a camera and then we develop the corresponding control messages issued by the client in order to change the video parameters. In addition, we implement a video recovery mechanism by measuring the differences in arrival time between every packet (referred to as diff). Finally, we observe with our proposed scheme whether the video quality can be smoother under different background traffics. In the video recovery mechanism, we utilize diff to decide whether a higher quality picture should be persisted or downgraded to a lower quality picture to avoid packet loss under network congestion.

This thesis follows up a cognitive psychological phenomenon, called boundary extension. This effect describes a situation, when we remember parts of a scene during scene perception, which could be located outside of the frame, but we actually did not see it. The literary review part offers up summary of fundamental findings of approximately thirty years of research of this phenomenon. The research part submits an experiment examining a boundary extension in panoramic photographs with respect to an effect of multiple factors, a sequence length (nine and thirteen frames), a type of sequence (indoor and outdoor), a target picture size (normal, close-up, wide-angle). This experiment is the first larger study of boundary extension in Czech population and the examined effect of factors was not experimentally verified in previous studies. Keywords Boundary extension, panoramic photographs, sequence length, type of sequence, target picture size