Ringing artifacts arise near edges in highly compressed JPEG2000 images. This paper is devoted to the study of the optimal bilateral filter parameter selection in image deringing. We propose modification of the bilateral filter: adaptive bilateral filter, where parameters of bilateral filter are changing according to the corresponding pixel. On the first stage calculation of the filter paramete...

We present the design and rationale of a practical system for passing confidential messages. The mechanism is an adaptation of Rivest’s “chaffing and winnowing”, which has the legal advantage of using authentication keys to provide privacy. We identify a weakness in Rivest’s particular choice of his “package transform” as an “all-or-nothing” element within his scheme. We extend the basic system...

To accomodate standards changes and algorithmic improvements, functional reconfigurability is increasingly desired for media processing. Such adaptability, however, generally comes at significant power cost. This work suggests that another dimension of adaptation can be beneficial – power adaptation. Through a unique compiler–hardware approach, we (1) demonstrate an extension to the state-of-th...

We discuss the possibilities and limitations of a scalable video codec based on JPEG2000. We give a review of wavelet-based motion-compensated temporal filtering (MCTF) and discuss how JPEG2000 components can be used for coding temporal subbands and motion data. At the example of a simple implementation that uses as many ingredients from JPEG2000 as possible, we discuss some issues in coding tr...

In this paper, a method for measuring the perceptual image quality of JPEG-2000 coded images has been proposed. The image quality is characterized by the average edgespread in the image, or more specifically the average extent of the slope’s spread of an edge in the opposing gradients’ directions. The proposed method is, in effect, a way of measuring the amount of blurring in the image. The eff...

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