Existing sinogram restoration methods cannot handle noises and nonstationary artifacts simultaneously. Although bilateral filter provides an efficient way to preserve image details while denoising, its performance in sinogram restoration for low-dosed X-ray computed tomography LDCT is unsatisfied. The main reason for this situation is that the range filter of the bilateral filter measures simil...

In most previously reported studies on pseudonoise (PN) code acquisition, independent additive noises have been assumed in various noise environments. The use of an independent observation model may cause considerable performance degradation in modern high datarate communication systems. In these studies, only additive noise model is considered. In this paper, a new detector for PN code acquisi...

This paper focuses on the JPEG noises, which include the quantization noise and the rounding noise, during a JPEG compression cycle. The JPEG noises in the first compression cycle have been well studied; however, so far less attention has been paid on the JPEG noises in higher compression cycles. In this work, we present a statistical analysis on JPEG noises beyond the first compression cycle. ...

This paper proposes a new methodology to improve robustness of recognition performance to aggregate of noises by two-dimensional visualization technique. At first, an aggregate of noises existing in adverse environments are collected as much as possible. Then, hidden Markov model (HMM) for each collected noise is trained. Aggregate of the trained HMMs are visualized into two-dimensional map by ...

Micro electromechanical sensors (MEMS) play a vital role along with global positioning devices in navigation of autonomous vehicles .These sensors are low cost ,easily available but depict colored noises and unpredictable discontinuities .Conventional filters like Kalman filters and Sigma point filters are not able to cope with nonwhite noises. This research has utilized H∞ filter in nonlinear ...

PERFORMANCE COMPARISON BETWEEN FILTERS AND WAVELET TRANSFORM IN IMAGE DENOISING FOR DIFFERENT NOISES Bobby1 and Manish Mahajan2 Research Scholar (M. Tech.), Information Technology Department, Chandigarh Engineering College Landran, Mohali, Punjab, India. E-mail: [email protected] 2Assistant Professor Supervisor, Information Technology Department, Chandigarh Engineering College Landran, Moh...