Abstract: When, in a network computer system, a Web browser on a host computer acquires information about images or the like from a network or the like, it analyzes the data received in a proxy server, and, in case the details of the data are moving images, transmits substitute images with the same screen size to host computer, and transmits the moving image access information toward user computer. In case substitute images have been transmitted by proxy server, host computer transmits, to user computer, the display position and screen size of the moving images and information indicating Web server saving the moving images. In this way, it is possible, even when a host computer is remotely operated from a user computer via a network and moving images are displayed, to play back the moving images smoothly.

Abstract: An imaging device has a frame selector that performs frame removal processing for removing certain image frames from the image data such that groups of successive image frames remain at predetermined intervals. A monitoring center has a high resolution processor that uses received multiple image frames to perform high resolution processing. The frame selector has a motionless frame generator for generating motionless image frames indicating no motion compared with an image frame to be referenced. The frame selector inserts the motionless image frames into positions in the image data at which image frames have been removed by the frame removal processing to form image data to be transmitted. It is therefore possible to reduce the amount of data to be transmitted and display an acquired image at a high resolution.