Image sizes have increased exponentially in recent years. The resulting high-resolution images are often viewed via remote image browsing. Zooming and panning are desirable features in this context, which result in disparate spatial regions of an image being displayed at a variety of (spatial) resolutions. When an image is displayed at a reduced resolution, the quantization step sizes needed fo...

JPEG2000 is a family of technologies based on the image compression system defined in IS 15444-1. Presently, the ISO/IEC Joint Technical Committee of Photographic Experts (JPEG) is developing an international standard for interactivity with JPEG2000 files, called JPIP; it will become Part 9 of the standard. One of the main goals of JPIP is to exploit the multi-resolution and spatially random ac...

This paper is concerned with remote browsing of JPEG2000 compressed imagery. A potentially interactive client identifies a region and maximum resolution of interest. The server responds by sending information from the JPEG2000 code-stream which is relevant to this region and resolution. We propose an algorithm for sequencing data from the original code-stream in such a way as to maximize the re...

We describe and compare three probabilistic ways to perform Content Based Image Retrieval (CBIR) in compressed domain using images in JPEG2000 format. Our main focus are arbitrary non-uniformly textured color images, as can be found, e.g., in home user image collections. JPEG2000 offers data that can be easily transferred into features for image retrieval. Thus, when converting images to JPEG20...

We address the issue of JPEG2000 transmission over wireless channels using Unequal Power Allocation (UPA). First, an algorithm for multicasting JPEG2000 images over MIMO systems is proposed. According to antenna selection orders requested by receivers, the channel assignment unit transmits the substreams with different powers from antennas. The decoder is modified such that when two copies of a...

In this paper, we discuss how the two reference implementations of the upcoming JPEG2000 image coding standard can be parallelized for the execution on sharedmemory multiprocessors. By runtime analysis, we identify two major stages in the coding process of JPEG2000 where parallelism can be exploited. We present techniques to exploit the parallelism within these two stages, and speedup results o...

Abstract : This paper presents a lossless image coding approach that produces an embedded bit−stream optimized for L−infinity−constrained decoding. The decoder is implementable using only integer arithmetic and is able to deduce from the bit−stream the L−infinity error that affects the reconstructed image at an arbitrary point of decoding. The lossless coding performance is compared with JPEG−L...

We compare the new still-image compression standard, JPEG2000, with two competing algorithms based on the Wavelet Difference Reduction (WDR) technique of encoding. Our comparison shows that these WDR methods provide far simpler encoding while also providing essentially the same performance as JPEG2000 at moderately high to very high compression ratios. They provide useful alternative algorithms...

A litling based I-D Discrete Wavelet Transform (DWT) core is proposed. It is re-configurable for Y 3 and 9/7 filters in JPEG2000. Folded architecture is adopted to reduce the hardware cost and achieve the higher hardware utilization. Multiplication is realized in hard\+ ired multiplier with coefficients represented in canonic signcd-digit (CSD) form. I t is a compact and efficient DWT core for ...

This paper presents results of an analysis of different implementations of the JPEG2000 standard, specifically part 1: JP2, an image format that is currently popular within the digital preservation community. In particular we are interested in the effect different JPEG2000 codecs (encoders and decoders) have on image quality in response to lossy compression. We focus on three main codec librari...