Virtual media (Vmedia) access protocol and its application in interactive image browsing

Jin Li; Hong-Hui Sun

doi:10.1117/12.410901

22 December 2000 Virtual media (Vmedia) access protocol and its application in interactive image browsing

Jin Li, Hong-Hui Sun

Proceedings Volume 4312, Multimedia Computing and Networking 2001; (2000) https://doi.org/10.1117/12.410901
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

In this work, we propose a virtual media (Vmedia) access protocol for interactive image browsing over the Internet. Vmedia is a multimedia communication protocol in a server- client environment. It enables the access and delivery of segments of media, and manages the delivered media segments with a local Vmedia cache. An interactive JPEG 2000 image browser is implemented with Vmedia. The image is compressed with JPEG 2000 into one single bitstream and put on the server. In the interactive browsing process, the user specifies a region of interest (ROI) with a certain spatial and resolution constraint. The Vmedia browser only downloads the media segments covering the current ROI, and the download is performed in a progressive fashion so that a coarse view of the ROI can be rendered very quickly and then gradually refined as more and more bits arrive. In the case of switch of ROI, e.g, zooming in/out or panning around, the Vmedia browser will use existing media segments in cache to quickly render a coarse view of the new ROI, and in the same time, request a new set of media segments corresponding to the updated ROI. Vmedia greatly improves the browsing experience of large images over slow networks.

Citation Download Citation

Jin Li and Hong-Hui Sun "Virtual media (Vmedia) access protocol and its application in interactive image browsing", Proc. SPIE 4312, Multimedia Computing and Networking 2001, (22 December 2000); https://doi.org/10.1117/12.410901

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