High-Resolution Photographic VR Objects Delivered over Limited Bandwidth using Streaming Image Technology

Gary L. Nieder, Frank Nagy and Lynn A. Wagner, Wright State University School of Medicine, Dayton, OH, USA

The usefulness of high-resolution photo-realistic virtual objects, such as those made with QTVR technology has been limited by the very large file sizes involved and hence lengthy downloads over typical Internet connections. Several "streaming" image formats have been developed that facilitate high-resolution image distribution by using an image pyramid system. In these systems, a low-resolution image is initially downloaded. Zooming in on this image brings in additional image data to create a higher resolution image in the zoomed region. Zooming further, or panning the image brings in additional data as needed. This dialog between client and server means that only the image data that is needed is downloaded, speeding download times while permitting high-resolution viewing. We have used one of these commercially available systems, "Zoomify" to produce high-resolution anatomical VR objects which can be effectively viewed over limited bandwidth connections. The advantages of this system are its simple PhotoShop plug-in interface, ability to process static 2D images as well as VR objects and panoramas, and versatile deployment via QuickTime, Zoomify Plug-in/ActiveX, Java, or a "clientless" Perl CGI. Examples of high resolution streaming objects are being distributed on our QuickTime VR Anatomical Resources web site <>.


Attendees will be able to view high resolution streaming VR object movies and 2D static images over the Internet and experience the potential of this technology. Computer resources will also be available at the demo for attendees to make their own streaming high-resolution images and movies.

Gary L. Nieder
Department of Anatomy
Wright State University School of Medicine Dayton, OH 45435
Phone: 937-775-2547
Fax: 937-775-3391

Frank Nagy
Lynn A. Wagner
Department of Anatomy
Wright State University School of Medicine Dayton, OH 45435
Phone: 937-775-2253
Fax: 937 775-3391
Website: www.anatomy,