Reversible Date Hiding using Multi Level Integer Wavelet Decomposition and Intelligent Coefficient Selection

2007 ◽  
Author(s):  
S. Yousefi ◽  
H. R. Rabiee ◽  
E. Yousefi ◽  
M. Ghanbari
Keyword(s):  
Wavelet Decomposition ◽  
Multi Level ◽  
Integer Wavelet

Single Image De-Hazing via Multiscale Wavelet Decomposition and Estimation with Fractional Gradient-Anisotropic Diffusion Fusion

2021 ◽  
pp. 2150032
Author(s):  
Uche A. Nnolim
Keyword(s):  
High Frequency ◽  
Anisotropic Diffusion ◽  
Wavelet Decomposition ◽  
Single Image ◽  
Nonlocal Means ◽  
Gradient Domain ◽  
Multi Level ◽  
Bilateral Filters ◽  
Approximation Coefficients ◽  
Experimental Comparisons

This paper presents algorithms based on fractional multiscale gradient fusion and multilevel wavelet decomposition for underwater and hazy image enhancement. The algorithms utilize partial differential equation (PDE)-generated low- and high-frequency images fused via gradient domain and anisotropic diffusion. Furthermore, wavelet multi-level decomposition, estimation and adjustment of detail and approximation coefficients are employed in improving local and global enhancement. Solutions to halo effect are also developed using compressive bilateral filters or other nonlinear/nonlocal means filter. Ultimately, experimental comparisons indicate that the proposed methods surpass or are comparable to several algorithms from the literature.

Intrusion signal recognition in OFPS under multi-level wavelet decomposition based on RVFL neural network

Optik ◽  
2017 ◽  
Vol 146 ◽  
pp. 38-50 ◽  
Author(s):  
Qing Tian ◽  
Chao Zhao ◽  
Yuan Zhang ◽  
Hongquan Qu
Keyword(s):  
Neural Network ◽  
Wavelet Decomposition ◽  
Signal Recognition ◽  
Multi Level

Integer wavelet decomposition for lossy image compression

1999 ◽  
Author(s):  
Julien Reichel ◽  
Gloria Menegaz ◽  
Marcus J. Nadenau
Keyword(s):  
Image Compression ◽  
Wavelet Decomposition ◽  
Integer Wavelet

Algorithm of Digital Watermark Based on Wavelet

2013 ◽  
Vol 756-759 ◽  
pp. 3298-3302
Author(s):  
Si Yu Lai ◽  
Juan Wang
Keyword(s):  
Wavelet Decomposition ◽  
Digital Watermark ◽  
Source Image ◽  
Wavelet Domain ◽  
Visual Model ◽  
Multi Level ◽  
Embedded Image ◽  
Watermark Algorithm ◽  
Human Visual Model ◽  
Traditional Image

Analyze a human visual model based wavelet domain digital watermark algorithm and improved it. First conduct multi-level wavelet decomposition on original image and modify medium frequency coefficient, and then adapt the algorithm to embed the watermark into the source image. The experiment shows that the watermark embedded image enjoys better imperceptibility and robustness to JPEG compression, add gaussian noise, contrast enhancement e.t. traditional image processing operations.

scholarly journals RVFL-Based Optical Fiber Intrusion Signal Recognition With Multi-Level Wavelet Decomposition as Feature

2018 ◽  
Vol 8 (3) ◽  
pp. 234-241 ◽  
Author(s):  
Yanping Wang ◽  
Dianjun Gong ◽  
Liping Pang ◽  
Dan Yang
Keyword(s):  
Optical Fiber ◽  
Wavelet Decomposition ◽  
Signal Recognition ◽  
Multi Level
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