Interactive Transmission of JPEG2000 Images Using Web Proxy Caching

This paper describes and analyzes JPIP-W, an innovative proposal for the interactive transmission of JPEG2000 images on the Internet. JPIP-W is an extension of JPIP, the current JPEG protocol proposed for interactive JPEG2000 image browsing. One of the JPIP characteristics of greatest interest is its ability to use the Web for retrieving images. However, JPIP is unable to exploit the large infrastructure of today´s Web caching systems (proxies), used to reduce response time and network traffic. To overcome this drawback, JPIP-W defines a new server-client interaction consisting of splitting JPEG2000 images into data blocks that can be cached by the proxies. These blocks can be shared among several clients, allowing fast recovery of some portions of the images. Experimental results demonstrate that JPIP-W significantly reduces JPIP retrieving times.