Results 51 to 60 of about 89,376 (355)

Efficient and Robust Medical Image Watermarking Based on Optimal Subband Tree Structuring and Discrete Fractional Fourier Transform

Computer Assisted Methods in Engineering and Science, 2023
In order to solve the security problems associated with medical information and improve the robustness of watermarking algorithms for medical images, a unique approach to watermarking based on block operations is presented.
Anusha Chacko, Shanty Chacko
doaj   +1 more source

Fractional-order diffusion for image reconstruction [PDF]

, 2012
International audienceIn this paper, a general framework based on fractional-order partial differential equations allows to solve image reconstruction problems.
Larnier, Stanislas, Mecca, Roberto
core   +3 more sources

Design of fractional order differentiator using type-III and type-IV discrete cosine transform

Engineering Science and Technology, an International Journal, 2017
In this paper, an interpolation method based on discrete cosine transform (DCT) is employed for digital finite impulse response-fractional order differentiator (FIR-FOD) design. Here, a fractional order digital differentiator is modeled as finite impulse
Manjeet Kumar, Tarun Kumar Rawat
doaj   +1 more source

Discrete Transforms and Matrix Rotation Based Cancelable Face and Fingerprint Recognition for Biometric Security Applications

Entropy, 2020
The security of information is necessary for the success of any system. So, there is a need to have a robust mechanism to ensure the verification of any person before allowing him to access the stored data.
Abeer D. Algarni, Ghada El Banby, Sahar Ismail, Walid El-Shafai, Fathi E. Abd El-Samie, Naglaa F. Soliman   +5 more
doaj   +1 more source

A Fractional-Order Telegraph Diffusion Model for Restoring Texture Images with Multiplicative Noise

Fractal and Fractional, 2023
Multiplicative noise removal from texture images poses a significant challenge. Different from the diffusion equation-based filter, we consider the telegraph diffusion equation-based model, which can effectively preserve fine structures and edges for ...
Xiangyu Bai, Dazhi Zhang, Shengzhu Shi, Wenjuan Yao, Zhichang Guo, Jiebao Sun   +5 more
doaj   +1 more source

Iterative Time-Varying Filter Algorithm Based on Discrete Linear Chirp Transform

, 2018
Denoising of broadband non--stationary signals is a challenging problem in communication systems. In this paper, we introduce a time-varying filter algorithm based on the discrete linear chirp transform (DLCT), which provides local signal decomposition ...
Akan, Aydin, Alkishriwo, Osama A. S., Elghariani, Ali A.   +2 more
core   +1 more source

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

Kinetic Insights into Precursor‐Assisted Soft Sphere Close Packing Revealed by In Situ GISAXS with Implications for Gas Sensing

Advanced Functional Materials, EarlyView.
The versatile precursor‐assisted soft sphere close packing during slot‐die coating is investigated with in situ X‐ray scattering. The soft crystallization pathways towards a close packing involve multistep structural transitions such as surface nucleation, in‐plane, and out‐of‐plane crystallization.
Guangjiu Pan, Wenhe Xie, Suzhe Liang, Ting Tian, Shanshan Yin, Lixing Li, Altantulga Buyan‐Arivjikh, Jinsheng Zhang, Thomas Baier, Zhuijun Xu, Matthias Schwartzkopf, Sarathlal Koyiloth Vayalil, Stephan V. Roth, Yonghui Deng, Peter Müller‐Buschbaum   +14 more
wiley   +1 more source

SAR-Based Vibration Estimation Using the Discrete Fractional Fourier Transform [PDF]

, 2012
A vibration estimation method for synthetic aperture radar (SAR) is presented based on a novel application of the discrete fractional Fourier transform (DFRFT).
Atwood, Tom, Beach, Ryan J., Doerry, Armin W., Dunkel, Ralf, Gerstle, Walter, Hayat, Majeed M., Pepin, Matthew, Santhanam, Balu, Wang, Qi   +8 more
core   +1 more source

Log-correlated Gaussian fields: an overview [PDF]

, 2014
We survey the properties of the log-correlated Gaussian field (LGF), which is a centered Gaussian random distribution (generalized function) $h$ on $\mathbb R^d$, defined up to a global additive constant. Its law is determined by the covariance formula $$
Duplantier, Bertrand, Rhodes, Rémi, Sheffield, Scott, Vargas, Vincent   +3 more
core   +4 more sources