We present a self-stabilizing leader election algorithm for arbitrary networks, with spacecomplexity Opmaxtlog∆, log lognuq bits per node in n-node networks with maximum degree ∆. This space complexity is sub-logarithmic in n as long as ∆ “ n. The best space-complexity known so far for arbitrary networks was Oplog nq bits per node, and algorithms with sublogarithmic space-complexities were know...

Image steganography is the best aspect of information hiding. In this, the information is hidden within an image and the image travels openly on the Internet. The Least Significant Bit (LSB) is one of the most popular methods of image steganography. In this method, the information bit is hidden at the LSB of the image pixel. In one bit LSB steganography method, the total numbers of the pixels a...

We describe the three-dimensional holographic optical disc system for application as read-only memory. Several systems design issues are discussed including imaging optics, storage density, readout rate, and the alignment servo system. We demonstrate 40 bits=lm surface density and pixel-matched holographic data readout from a 12 cm disc spinning at 600 RPM.

A 640×512 CMOS image sensor with an 8b bit-serial Nyquist rate ADC per 4 pixels achieves 10.5 × 10.5 μm pixel size at 29% fill factor in 0.35 μm CMOS technology. Binary floating point output with measured dynamic range of of 65536 : 1 is achieved by multiple sampling at exponentially increasing exposure times. D. Yang, A. El Gamal, B. Fowler, and H. Tian 1 Dynamic range, defined as the ratio of...

Heung-Kyu Lee Korea Advanced Institute of Science and Technology Department of Computer Science 373-1 Kusong-dong, Yousong-gu Taejon, 305-701, Korea Abstract. An adaptive bit-reduced mean absolute difference (ABRMAD) is presented as a criterion for the block-matching algorithm (BMA) to reduce the complexity of the very large scale integration (VLSI) implementation and to improve the processing ...

In this paper, a fragile watermarking technique using Legendre transform (LT) has been proposed for color image authentication (LTCIA). An initial pixel adjustment is used to ensure that it never exceeds the range of a valid pixel component. The Legendre transform (LT) is applied on each pair of pixel components of the carrier image in row major order. The transformed components of each transfo...

In prediction-based reversible watermarking schemes, watermark bits are embedded in the prediction errors. An accurate prediction results in smaller prediction errors, more efficient embedding, and less distortion for the watermarked image. In this paper, an accurate prediction is made using artificial neural networks. Before the embedding operation, 2 neural networks are trained by the pixel v...

In recent times, research on image encryption using chaotic systems has emerged. However, some of the proposed schemes still hinder the system performance and security. In this study, we introduce an efficient image encryption scheme based on pixel bit and combination of polynomial chaotic maps with variable initial parameters. The algorithm takes advantage of the best features of chaotic maps ...

The dramatic increase in the computational speed provided by state-of-the-art high-end DSP’s offers the possibilities of processing large high-resolution images in real time. The authors have experience in high-fidelity lossy compression of high-resolution color medical images (up to 2048x4096 pixels, eight bits per pixel) using TI’s TMS320C6201 DSP’s. The amount of on-chip memory in C’6000 DSP...

Image compression is necessary in various applications, especially for efficient transmission over a band-limited channel. It is thus desirable to be able to segment an image in the compressed domain directly such that the burden of decompressing computation can be avoided. Motivated by the adaptive binary arithmetic coder MQ coder of JPEG2000, we propose an efficient scheme to segment the feat...