Results 61 to 70 of about 2,467 (209)
Applied Sciences, 2022 The nano-scale spatial positioning of nanoparticles in tumor cells can be achieved through the double-helix point spread functions (DH-PSF). Nevertheless, certain issues such as low light intensity concentration of the main lobes, the influence of the ...
Jun Yang +6 more
doaj +1 more source
Phase‐Retrieved High‐Throughput Multi‐Channel Simultaneous Surface Plasmon Resonance Detection
Laser &Photonics Reviews, Volume 20, Issue 4, 19 February 2026.This work presents a new phase‐retrieval high‐throughput multi‐channel simultaneous SPR detection framework. By integrating an objective lens‐based coupling system with a rotation‐based ePIE (r‐ePIE) phase retrieval on the back focal planes, this framework significantly reduces the minimum required detection area to reveal localized information.
Mengqi Shen +3 more
wiley +1 more source
Bound on the radial derivatives of the Zernike circle polynomials (disk polynomials)
, 2020 We sharpen the bound n2k on the maximum modulus of the kth radial derivative of the Zernike circle polynomials (disk polynomials) of degree n to n2(n2−12)⋅…⋅(n2−(k−1)2)∕2k(1∕2)k.
Janssen, A.J.E.M.
core +1 more source
Clusters morphology by Zernike polynomials [PDF]
, 2021 The study of the morphology of multiwavelength images of galaxy clusters is largely used to infer their dynamical state. We presented a novel approach of morphological analysis based on modelling clusters images with Zernike polynomials (ZPs).
De Petris, M. +13 more
core +1 more source
Sensors, 2022 Research has shown that longitudinal chromatic aberration (LCA) of the human eye is generated across all of the eye’s optical surfaces. However, it may not be necessary to measure the LCA from the first surface of the cornea to the retina, as it is known
Uriel Calderon-Uribe +2 more
doaj +1 more source
Resolving capacity of the circular Zernike polynomials
Optics Express, 2015 Circular Zernike polynomials are often used for approximation and analysis of optical surfaces. In this paper, we analyse their lateral resolving capacity, illustrating the effects of a lack of approximation by a finite set of polynomials and answering the following questions: What is the minimum number of polynomials that is necessary to describe a ...
M V, Svechnikov +3 more
openaire +2 more sources
Driving Innovation: The Impact of National Health Policies on Optometry Research in East Asia
The International Journal of Health Planning and Management, Volume 41, Issue 1, Page 37-46, January 2026.ABSTRACT This study examines the optometric research landscape in three East Asian countries—China, Japan, and Korea—analysing how research trends align with each country's national health strategies. By evaluating published articles and reviews from national journals between 2006 March 2025, we identify key areas of focus, including paediatric ...
Jihye Ahn, Moonsung Choi
wiley +1 more source
IET Image Processing, Volume 20, Issue 1, January/December 2026.This paper presents a robust reversible watermarking algorithm based on Chebyshev moments, employing a two‐stage embedding mechanism. The proposed method leverages image block partitioning to embed the copyright watermark and the reversible watermark into non‐overlapping regions located inside and outside the inscribed circle of the image, respectively.
Wenjing Sun, Ling Zhang, Hongjun Zhang
wiley +1 more source
Performance Analysis of the LDPC‐Coded Hybrid LQAM‐MPPM for UWOC Systems
IET Optoelectronics, Volume 20, Issue 1, January/December 2026.The effectiveness of LDPC codes in improving the performance of hybrid modulations is discussed, with coded 128‐QAM‐(12, 2) MPPM offering ~6.5 and 5.8 dB code gains at a BER of in strong and moderate turbulence, respectively. These results demonstrate the promise of hybrid modulation with LDPC as a robust and efficient modulation scheme for UWOC ...
Hongyan Jiang +6 more
wiley +1 more source
Textual Feature Extraction and Machine Learning Classification for Document Forgery Detection
Applied Computational Intelligence and Soft Computing, Volume 2026, Issue 1, 2026.The authentication of scanned administrative documents is a critical challenge in digital forensics due to the accessibility of sophisticated image editing tools. While existing forgery detection methods focus on geometric patterns or hardware signatures, they often struggle with the structural complexity of Arabic cursive script or require original ...
Hiba Benhamza +3 more
wiley +1 more source