Direct image resampling using block transform coefficients

1993 ◽  
Vol 5 (3) ◽  
pp. 259-272 ◽  
Author(s):  
S.P Kim ◽  
Wen-yu Su
Keyword(s):  
Direct Image ◽  
Block Transform ◽  
Transform Coefficients

scholarly journals Abelianisation of logarithmic $$\mathfrak {sl}_2$$-connections

2021 ◽  
Vol 27 (5) ◽  
Author(s):  
Nikita Nikolaev
Keyword(s):  
Double Cover ◽  
Direct Image

AbstractWe prove a functorial correspondence between a category of logarithmic $$\mathfrak {sl}_2$$ sl 2 -connections on a curve $${\mathsf {X}}$$ X with fixed generic residues and a category of abelian logarithmic connections on an appropriate spectral double cover "Equation missing". The proof is by constructing a pair of inverse functors $$\pi ^\text {ab}, \pi _\text {ab}$$ π ab , π ab , and the key is the construction of a certain canonical cocycle valued in the automorphisms of the direct image functor $$\pi _*$$ π ∗ .

Image Digest using Color Vector Angle and Dominant Walsh-Hadamard Transform Coefficients

2021 ◽  
Author(s):  
Naveena Budda ◽  
K. Meenakshi ◽  
Padmavathi Kora ◽  
G.V. Subba Reddy ◽  
K. Swaraja
Keyword(s):  
Hadamard Transform ◽  
Color Vector ◽  
Transform Coefficients ◽  
Walsh Hadamard Transform ◽  
Vector Angle

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.

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