The Wavelet transform gives a 2D-space time-frequency presentation for responses in the 1Dspace time domain. This paper presents the results of investigating the application of wavelet transform to characterize the nonlinear and chaotic response of a clearance-coupled-impact system. The behavior of impacting systems is highly nonlinear exhibiting a myriad of harmonic, low order and high order s...

ABSTRACT 2D DWT can be extended to 3D an thus applied to video coding [1, 2, 3, 4, 5]. Such video codecs take advantage of both coding efficiency and scalability of the wavelet transform. Some promising new video coding methods are based on 3D subband coding with motion compensation [6, 7, 8, 9, 10]. These methods provide encouraging results comparatively to MPEG. However 3D subband coding of v...

As the world advances with technology and research, images are being widely used in many fields such as biometrics, remote sensing, reconstruction etc. This tremendous growth in image processing applications, demands majorly for low power consumption, low cost and small chip area. In this paper we analyzed 2D biorthogonal wavelet transform based on Fixed point approximation. Filter coefficients...

Denoising of real world images that are degraded by Gaussian noise is a long established problem in statistical signal processing. The existing models in time-frequency domain typically model the wavelet coefficients as either independent or jointly Gaussian. However, in the compression arena, techniques like denoising and detection, states the need for models to be nonGaussian in nature. Proba...

In this paper, we present an object-based coding scheme using three-dimensional shape-adaptive discrete wavelet transforms (SA-DWT). Rather than straightforward extension of 2D SA-DWT, a novel way to handle the temporal wavelet transform using a motion model is proposed to achieve higher coding efficiency. Corresponding to this transform scheme, we use a 3D entropy coding algorithm called Motio...

Introduction: A major problem facing the patients with chronic liver diseases is the diagnostic procedure.  The conventional diagnostic method depends mainly on needle biopsy which is an invasive method. There  are  some  approaches  to  develop  a  reliable  noninvasive  method  of  evaluating  histological  changes  in  sonograms. The main characteristic used to distinguish between the normal...

In this paper, a novel 3D face recognition scheme by Sliding Complex Wavelet Structural SIMilarity (SCW-SSIM) index carried out on detailed geometry images is proposed. First, the preprocessed 3D faces are mapped into geometry images on 2D plane. Then, a multi-scale wavelet transform is designed to decompose geometry image into a set of sub-images and denotes high-pass sub-images of wavelet tra...