Interactive Transmission of JPEG2000 Images Using Web Proxy Caching

Ortiz, Juan Pablo Garcia; Ruiz, Vicente González; López, Manuel F.; Garcı́a, Inmaculada

doi:10.1109/tmm.2008.921738

Cited by 11 publications

(9 citation statements)

References 12 publications

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“…The reason that for is because petitions carried out by JPIP clients are understood by proxies as URLs, thus, only exactly the same requests are matched. This issue is studied in [10], where a modification to JPIP to take advantage of HTTP proxy servers is proposed.…”

Section: A Preliminariesmentioning

confidence: 99%

“…Third, prefetching strategies at the client side enhance the browsing experience due to a faster visualization of the requested areas [9]. Last but not least, the deployment of proxy servers at different points of a local network, or distributed over the Internet, reduces both the load of the server and the client's response time [10], [11].…”

Section: Introductionmentioning

confidence: 99%

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Smart JPIP Proxy Server with Prefetching Strategies

Monteagudo-Pereira

Aulí-Llinàs

Serra-Sagristà

et al. 2010

2010 Data Compression Conference

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Remote browsing of images is receiving much attention lately, mostly in niche applications like geographical information systems or in the telemedicine scenery. Interactive transmission of compressed images has been identified as the most competitive approach, being JPIP, JPEG2000 Interactive Protocol, a key-enabler for these situations. Also, it has been reported that JPIP Proxy Servers help to increase the transmission performance, and that prefetching strategies help to lower responsiveness time. In this paper we contribute a smart JPIP Proxy Server that, thanks to a prefetching strategy undertaken during idle transmission times, largely improves the viewing experience of the final user because of its anticipation of future navigation requests. Experimental results are reported for a remote sensing and a medical environment, respectively performing panning and zoom in, showing enhanced performance in both cases.

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Section: A Preliminariesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Smart JPIP Proxy Server with Prefetching Strategies

Monteagudo-Pereira

Aulí-Llinàs

Serra-Sagristà

et al. 2010

2010 Data Compression Conference

View full text Add to dashboard Cite

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“…Oritz et al [8] exploited the large infrastructure of today's web proxy caching systems to interactively transmit JPEG2000 images, while Liu et al [9] used them for media streaming. Luo et al [10] focused on making proxy caching work for database-backed Web sites.…”

Section: Introductionmentioning

confidence: 99%

A neural network proxy cache replacement strategy and its implementation in the Squid proxy server

Romano

ElAarag

2010

Neural Comput & Applic

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As the Internet has become a more central aspect for information technology, so have concerns with supplying enough bandwidth and serving web requests to end users in an appropriate time frame. Web caching was introduced in the 1990s to help decrease network traffic, lessen user perceived lag, and reduce loads on origin servers by storing copies of web objects on servers closer to end users as opposed to forwarding all requests to the origin servers. Since web caches have limited space, web caches must effectively decide which objects are worth caching or replacing for other objects. This problem is known as cache replacement. We used neural networks to solve this problem and proposed the Neural Network Proxy Cache Replacement (NNPCR) method. The goal of this research is to implement NNPCR in a real environment like Squid proxy server. In order to do so, we propose an improved strategy of NNPCR referred to as NNPCR-2. We show how the improved model can be trained with up to twelve times more data and gain a 5-10% increase in Correct Classification Ratio (CCR) than NNPCR. We implemented NNPCR-2 in Squid proxy server and compared it with four other cache replacement strategies. In this paper, we use 84 times more data than NNPCR was tested against and present exhaustive test results for NNPCR-2 with different trace files and neural network structures. Our results demonstrate that NNPCR-2 made important, balanced decisions in relation to the hit rate and byte hit rate; the two performance metrics most commonly used to measure the performance of web proxy caches.

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“…Furthermore, processing times have improved up to a 30% using a naive cache strategy (Iregui et al, 2007). Nevertheless, the success of these strategies is highly dependent on the computational architecture used for exploration (Iregui et al, 2007; Ortíz et al, 2008; Wienert et al, 2009) and on the degree of knowledgement one may have about how a user runs over the VS (Descampe et al, 2007). This article presents a prediction strategy which is adapted to navigating pathological images, permitting to prefetch pieces of images while also stores blocks which very likely will be used in the future.…”

Section: Introductionmentioning

confidence: 99%

A soft‐cache strategy for pathologist's navigation in virtual microscopy

Gómez

Marín

Romero

2010

Microscopy Res & Technique

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Navigation through large microscopical images demands special characteristics like flexibility to access image data and progressive recovery or relevant information, i.e., several qualities, magnifications, and random accesses to any desired Window of Interest in the Virtual Slide (VS). Nowadays there exist systems that allow such interaction, but with a certain delay, which is dependent on the application. It has been shown that caching or prefetching policies can speed up interaction with these systems. This article presents an optimal soft-cache strategy, which improves the navigation times in virtual microscopy. The entire method includes an optimal soft-cache strategy and a dynamical probabilistic model of a pathologist's navigation. This strategy was implemented as a Client-Server application, using the JPEG2000-JPIP standard and evaluated using different navigation patterns, namely, four different pathologists exploring 10 VS, stained with different dyes. The present approach was compared with a conventional soft-cache method and the cache performance improved, in average, in about a 10%.

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Interactive Transmission of JPEG2000 Images Using Web Proxy Caching

Cited by 11 publications

References 12 publications

Smart JPIP Proxy Server with Prefetching Strategies

Smart JPIP Proxy Server with Prefetching Strategies

A neural network proxy cache replacement strategy and its implementation in the Squid proxy server

A soft‐cache strategy for pathologist's navigation in virtual microscopy

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