A Java-centric Distributed Object-based Paradigm for Surveillance Services and Visual Message Exchange

PDA Watch for mobile surveillance services

“…However K-Java does not support JPEG format but GIF and BMP, Snapshot Capturer needs performing format conversion to GIF. Furthermore, the converted snapshot is a Java image object which cannot be transmitted over TCP/IP and thus needs further processing [7]. In Java, a color pixel of an image is represented by four bytes: one byte for the color's alpha (opacity), and one byte each for the actual colors red, green, and blue.…”

“…The popularity of powerful personal computers and the advancement in signal processing and multimedia technologies have culminated in applications such as media-on-demand, video conferencing, and visual query methodology, fundamentally changing how we function. In the previous work, we had developed an interesting multimedia application, Internet-based surveillance service, which allows users to watch real-time snapshots on the spot, from anywhere and at anytime, to retrieve suspicious historical scenarios, to access heterogeneous media, and to send urgent e-mails, or paging signals [7]. However, such service can only apply to wired-connection desktops and could not accommodate with the increasingly pervasive requirements from mobile users who carry handheld devices including personal digital assistants (PDAs).…”

“…Two autonomous communication utilities (Fax Agent and Pager Agent) are wrapped as components residing in independent servers and expose their services through Java interfaces by registering themselves to RMI (Remote Method Invocation) registries. It indicates that empowered by object-orientation of Java technology, more autonomous communication components can join in order to improve the service availability and load balance without many efforts[7].…”