Abstract: An object of the invention is to provide an image display device and a control method thereof which can reduce an image retrieving time and suppress an amount of data to be transmitted for retrieval. An image display device (4) is connected via communication lines to an NW cameral (1) for delivering picked-up images and a recorder (3) for storing the delivered images and displays the delivered images on an image display portion (43).

Abstract: Distributed modules in a network dynamically select communication protocols to communicate in a secure or firewall-protected network. Applications register with a lookup service. The lookup service maintains a lookup table including registration information for multiple applications. Registration information may include, but is not limited to, IP address, firewall restrictions, tunnel protocol, port information, and proxy queue capabilities. An application seeking to communicate acquires the registration information for a desired recipient from the lookup table. The application uses the registration information to select communication protocols necessary to communicate with the recipient.

Abstract: A camera control apparatus and method, in that angles required for cameras to train on a position designated by an operator, are calculated from the designated position and directions in which the cameras are currently oriented. On the basis of the thus-calculated angles, a camera requiring the minimum angle from among the plurality of cameras is determined as the camera capable of being trained on the designated position most quickly.

Abstract: Distributed modules in a network dynamically select communication protocols to communicate in a secure or firewall-protected network. Applications register with a lookup service. The lookup service maintains a lookup table including registration information for multiple applications. Registration information may include, but is not limited to, IP address, firewall restrictions, tunnel protocol, port information, and proxy queue capabilities. An application seeking to communicate acquires the registration information for a desired recipient from the lookup table. The application uses the registration information to select communication protocols necessary to communicate with the recipient.