Variational Bayesian image restoration with multi-structured model of wavelet transform coefficients

2019 ◽  
Vol 72 ◽  
pp. 1-8
Author(s):  
Le Qin ◽  
Zhen Wang ◽  
Qiuju Guan ◽  
Xuemei Guo ◽  
Guoli Wang
Keyword(s):  
Wavelet Transform ◽  
Image Restoration ◽  
Structured Model ◽  
Variational Bayesian ◽  
Transform Coefficients

Study on Damage Detection of Bridge Based on Wavelet Multi-Scale Analysis

2013 ◽  
Vol 639-640 ◽  
pp. 1010-1014 ◽  
Author(s):  
Ke Ding ◽  
Ting Peng Chen
Keyword(s):  
Wavelet Transform ◽  
Damage Detection ◽  
Detection Method ◽  
Mode Shapes ◽  
Scale Analysis ◽  
Multi Scale ◽  
Damage Location ◽  
Transform Coefficients ◽  
Beam Bridge ◽  
Multi Scale Analysis

The damage detection method based on wavelet multi-scale analysis is presented in the paper. The damage location can be identified by analyzing the multi-scale wavelet transform coefficients of curvatures of mode shapes. The extreme value of wavelet transform coefficients indicates the damage location. But it is difficult to detect the location of defect if the defect is near to the equilibrium position of vibration. In order to solve this problem, we put forward a method which is to add the wavelet transform coefficients of multi modals together. The method can effectively overcome the above problem. Three damage situations of simply supported beam bridge are discussed in the paper. The results show that the peaks of wavelet transform coefficients indicate the damage location of structural. It is possible to pinpoint the damage location based on wavelet multi-scale analysis on curvatures of mode shapes.

RL turbulence degraded image restoration algorithm based on wavelet transform

2017 ◽  
Vol 32 (10) ◽  
pp. 822-827
Author(s):  
徐晓睿 XU Xiao-rui ◽  
戴 明 DAI Ming ◽  
尹传历 YIN Chuan-li
Keyword(s):  
Wavelet Transform ◽  
Image Restoration ◽  
Restoration Algorithm ◽  
Degraded Image
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