A new method for restoration of still images in the presence of Gaussian and impulse noise

2002 ◽  
Author(s):  
V.S. Milosevic ◽  
V. Crnojevic ◽  
V. Radenkovic ◽  
V. Senk
Keyword(s):  
Impulse Noise ◽  
New Method ◽  
Still Images

scholarly journals Spectrogram Image Analysis of Error Signals for Minimizing Impulse Noise

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Jeakwan Kim ◽  
Yunseon Choi ◽  
Young-Sup Lee
Keyword(s):  
Image Analysis ◽  
Impulse Noise ◽  
Active Noise Control ◽  
Convergence Speed ◽  
New Method ◽  
Least Mean Square ◽  
Real Time Control ◽  
Step Size ◽  
Time Control ◽  
Analysis Of Error

This paper presents the theoretical and experimental study on the spectrogram image analysis of error signals for minimizing the impulse input noises in the active suppression of noise. Impulse inputs of some specific wave patterns as primary noises to a one-dimensional duct with the length of 1800 mm are shown. The convergence speed of the adaptive feedforward algorithm based on the least mean square approach was controlled by a normalized step size which was incorporated into the algorithm. The variations of the step size govern the stability as well as the convergence speed. Because of this reason, a normalized step size is introduced as a new method for the control of impulse noise. The spectrogram images which indicate the degree of the attenuation of the impulse input noises are considered to represent the attenuation with the new method. The algorithm is extensively investigated in both simulation and real-time control experiment. It is demonstrated that the suggested algorithm worked with a nice stability and performance against impulse noises. The results in this study can be used for practical active noise control systems.

Impulse Noise Suppression Method by Median Filtering with Parity Extraction

2013 ◽  
Vol 846-847 ◽  
pp. 991-994
Author(s):  
Zhen Xing Li
Keyword(s):  
Impulse Noise ◽  
Noise Suppression ◽  
Median Filter ◽  
Window Size ◽  
New Method ◽  
Median Filtering ◽  
Experiment Data ◽  
Simulation And Experiment ◽  
Suppression Method

A new impulse noise suppression method by median filtering with parity extraction was proposed in this paper. The window size of the median filter has important effect on the performance of the filtering result, larger window size can suppress impulse noise effectively but often at cost of loss of the detail information of the signal, while smaller window size can protect the detail information better but results in degrading of the noise suppression. Parity extraction is done to the signal at first and median filtering carries on the odd and even part respectively, and then a new method of median filtering with short window size to suppress the impulse noise is obtained. Simulation and experiment data of telemetry process results show the effectiveness of the proposed method.

A New Method of Cleaning Video from Impulse Noise

2019 ◽  
Author(s):  
N.I. Chervyakov ◽  
P.A. Lyakhov ◽  
A.R. Orazaev ◽  
M.V. Valueva
Keyword(s):  
Impulse Noise ◽  
New Method

A new method for removing impulse noise based on noise space characteristic

Optik ◽  
2013 ◽  
Vol 124 (18) ◽  
pp. 3503-3509 ◽  
Author(s):  
Zhiyong Zuo ◽  
Tianxu Zhang ◽  
Jing Hu ◽  
Gang Zhou
Keyword(s):  
Impulse Noise ◽  
New Method ◽  
Space Characteristic
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