A new color quantization (CQ) technique and its VLSI implementation is introduced. It is based on image split into windows and uses Kohonen Self Organized Neural Network Classifier (SONNC). Initially, the dominant colors of each window are extracted through the SONNC and then are used for the quantization of the colors of the entire image. The image split in windows offers reduction of the memo...

In modern wireless communication systems, Doppler frequency reduction is employed for efficient transmission of data in noisy environments. Achieving a very less bit error rate (BER) has been the major task in the orthogonal frequency division multiplexing (OFDM), which is a popular multicarrier modulation technique in IEEE 802.11a wireless systems and is currently being used in the IEEE 802.16...

BACKGROUND The optimal window procedure for drainage of a large pericardial effusion has yet to be established. The purpose of this study was to compare the outcomes associated with the subxiphoid and thoracotomy pericardial window techniques, with a focus on perioperative pain and effusion recurrence rates. METHODS A retrospective single-center observational study of all pericardial window o...

ABSTRACT. The IEEE 802.11 protocol for Wireless Local Area Networks adopts a CSMA/CA protocol with exponential backoff as medium access control technique. As the throughput performance of such a scheme becomes critical when the number of mobile stations increases, in this paper we propose an Adaptive Contention Window mechanism, which dynamically selects the optimal backoff window according to ...

A Biometric system is an automatic identification of an individual based on a unique feature or characteristic. Iris recognition has great advantage such as variability, stability and security. In this paper, use the two methods for iris segmentation -An automatic segmentation method and Window method. Window method is a novel approach which comprises two steps first finds pupils' center and th...

0974-9683/CIIT–IJ-1847/06/$20/$100 © 2011 CiiT Published by the Coimbatore Institute of Information Technology Abstract---Decision on reservoir water release is crucial during both intense and less intense rainfall seasons. Even though reservoir water release is guided by the procedures, decision usually made based on the past experiences. Past experiences are recorded either hourly, daily, or ...

Binocular digital imaging is a rapidly developing branch of digital imaging. Any such system must have some means that allows each eye to see only the image intended for it. We describe a time-division multiplexing technique that we have developed for Silicon Graphics Inc. (SGITM) workstations. We utilize the “double buffering” hardware feature of the SGITM graphics system for binocular image r...

This paper presents a technique for reducing additive noise from audio signals which have nonstationary properties. In the technique, we model a nonstationary signal as a set of tones having various durations. Since it is important to choose an appropriate analysis window size in Spectral Subtraction (SS) for such nonstationary signals, we propose a multi-stage SS technique, in which different ...

BACKGROUND Lower lateral crural deformities are common problems in rhinoplasty. The shape and position of the lower lateral crura directly influence the alar contour and external valve function. This study reviews an extensive experience with the lower lateral crural turnover flap, which represents a versatile and reproducible technique for correction of lower lateral crural deformities and imp...

Introduction: Introduction: Few studies have investigated the distribution of stress around implants. In this study the distribution of stress in bones around implants was investigated in five overdenture (OD) treatment designs including OD-1, OD-2, OD-3, OD-4 and OD-5. Materials and methods: The Catia modeling software was used in order to simulate the tooth/implant model and bone. First, the ...