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1. 2D Waveguided Bessel Beam Generated Using Integrated Metasurface-Based Plasmonic Axicon

Author:
Fan, Yulong; Cluzel, Benoît; Petit, Marlène; Le Roux, Xavier; Lupu, Anatole; de Lustrac, Andre
Source:
ACS applied materials & interfaces 2020 v.12 no.18 pp. 21114-21119
ISSN:
1944-8252
Subject:
image analysis,   etc   ; engineering; silicon;     Show all 3 Subjects
Abstract:
... Near-field imaging of the propagation of a diffraction-free Bessel-type beam in a guided wave configuration generated by means of a metasurface-based axicon lens integrated on a silicon waveguide is reported. The operation of the axicon lens with a footprint as small as 11 μm² is based on local engineering of the effective index of the silicon waveguide with plasmonic nanoresonators. This generic ...
DOI:
10.1021/acsami.0c03420

2. Single-Virus Tracking: From Imaging Methodologies to Virological Applications

Author:
Liu, Shu-Lin; Wang, Zhi-Gang; Xie, Hai-Yan; Liu, An-An; Lamb, Don C.; Pang, Dai-Wen
Source:
Chemical reviews 2020 v.120 no.3 pp. 1936-1979
ISSN:
1520-6890
Subject:
image analysis,   etc   ; fluorescence; viruses;     Show all 3 Subjects
Abstract:
... Uncovering the mechanisms of virus infection and assembly is crucial for preventing the spread of viruses and treating viral disease. The technique of single-virus tracking (SVT), also known as single-virus tracing, allows one to follow individual viruses at different parts of their life cycle and thereby provides dynamic insights into fundamental processes of viruses occurring in live cells. SVT ...
DOI:
10.1021/acs.chemrev.9b00692
PubMed:
31951121
PubMed Central:
PMC7075663

3. Graphs based methods for simultaneous smoothing and sharpening

Author:
Pérez-Benito, Cristina; Jordán, Cristina; Conejero, J. Alberto; Morillas, Samuel
Source:
MethodsX 2020 v.7 pp. 100819
ISSN:
2215-0161
Subject:
image analysis,   etc   ; color; graphs;     Show all 3 Subjects
Abstract:
... We present two new methods for simultaneous smoothing and sharpening of color images: the GMS³ (Graph Method for Simultaneous Smoothing and Sharpening) and the NGMS³(Normalized Graph-Method for Simultaneous Smoothing and Sharpening). They are based on analyzing the structure of local graphs computed at every pixel using their respective neighbors. On the one hand, we define a kernel-based filter f ...
DOI:
10.1016/j.mex.2020.100819
PubMed:
32195137
PubMed Central:
PMC7078387

4. Spectral responsivity calibration of a polarization remote sensor based on a supercontinuum laser and monochromator

Author:
Xie, Chenyu; Zhai, Wenchao; Li, Jianjun; Yin, Lin; Wu, Haoyu; Zheng, Xiaobing
Source:
International journal of remote sensing 2020 v.41 no.13 pp. 4981-4994
ISSN:
1366-5901
Subject:
image analysis,   etc   ; calibration; remote sensing;     Show all 3 Subjects
Abstract:
... Relative spectral responsivity is a basic parameter for detecting and evaluating the in-band response non-consistency of the channel polarization remote sensor (CPRS) in laboratory calibration. In this paper, a spectrally resolved calibration facility was assembled for the calibration of relative spectral responsivity by using novel supercontinuum laser and monochromator (SLM). Taking three polari ...
DOI:
10.1080/01431161.2020.1717670

5. Novel fusion method for SAR and optical images based on non-subsampled shearlet transform

Author:
Chu, Tianyong; Tan, Yumin; Liu, Qiang; Bai, Bingxin
Source:
International journal of remote sensing 2020 v.41 no.12 pp. 4590-4604
ISSN:
1366-5901
Subject:
image analysis,   etc   ; algorithms; remote sensing;     Show all 3 Subjects
Abstract:
... Due to the different imaging modes of SAR images and optical images, traditional image fusion methods are no longer suitable for the fusion of the two types of images. Fused images often have problems of spectral distortion and excessive introduction of noise. This study proposes an improved SAR-optical images fusion algorithm based on non-subsampled shearlet transform (NSST). NSST decomposition i ...
DOI:
10.1080/01431161.2020.1723175

6. Food object recognition using a mobile device: Evaluation of currently implemented systems

Author:
Knez, Simon; Šajn, Luka
Source:
Trends in food science & technology 2020 v.99 pp. 460-471
ISSN:
0924-2244
Subject:
image analysis,   etc   ; dieting; portable equipment;     Show all 3 Subjects
Abstract:
... Food object recognition systems present an attractive and useful research field since they enable objective measurements of eating activity. This feature is helpful and welcome in many dieting related instances, especially for managing health conditions or for analyzing eating patterns of research subjects.We evaluate current food object recognition systems that were implemented on a mobile device ...
DOI:
10.1016/j.tifs.2020.03.017

7. Bioinspired Zoom Compound Eyes Enable Variable-Focus Imaging

Author:
Cao, Jia-Ji; Hou, Zhi-Shan; Tian, Zhen-Nan; Hua, Jian-Guan; Zhang, Yong-Lai; Chen, Qi-Dai
Source:
ACS applied materials & interfaces 2020 v.12 no.9 pp. 10107-10117
ISSN:
1944-8252
Subject:
image analysis,   etc   ; biomimetic materials; ommatidia;     Show all 3 Subjects
Abstract:
... Natural compound eyes provide the inspiration for developing artificial optical devices that feature a large field of view (FOV). However, the imaging ability of artificial compound eyes is generally based on the large number of ommatidia. The lack of a tunable imaging mechanism significantly limits the practical applications of artificial compound eyes, for instance, distinguishing targets at dif ...
DOI:
10.1021/acsami.9b21008

8. Object-based feature selection using class-pair separability for high-resolution image classification

Author:
Su, Tengfei
Source:
International journal of remote sensing 2020 v.41 no.1 pp. 238-271
ISSN:
1366-5901
Subject:
image analysis,   etc   ; mathematics; remote sensing;     Show all 3 Subjects
Abstract:
... With the increasing popularity of object-based image analysis (OBIA) since 2006, numerous classification and mapping tasks were reported to benefit from this evolving paradigm. In these studies, segments are firstly created, followed by classification based on segment-level information. However, the feature space formed by segment-level feature variables can be very large and complex, posing chall ...
DOI:
10.1080/01431161.2019.1641242

9. Graphene-enabled tunable multifunctional metamaterial for dynamical polarization manipulation of broadband terahertz wave

Author:
Zhang, Yin; Feng, Yijun; Zhao, Junming
Source:
Carbon 2020 v.163 pp. 244-252
ISSN:
0008-6223
Subject:
image analysis,   etc   ; electromagnetic radiation; graphene; polymers;     Show all 4 Subjects
Abstract:
... Graphene-enabled metamaterials have emerged as promising photoelectric devices for dynamically controlling the polarization of electromagnetic waves. However, it is still a key technological challenge to design a tunable metamaterial possessing more sufficient freedom for polarization manipulation. Here, we propose a graphene-enabled tunable multifunctional metamaterial consisting of metallic stri ...
DOI:
10.1016/j.carbon.2020.03.001

10. Metal-graphene hybrid active chiral metasurfaces for dynamic terahertz wavefront modulation and near field imaging

Author:
Li, Jie; Li, Jitao; Yang, Yue; Li, Jining; Zhang, Yating; Wu, Liang; Zhang, Zhang; Yang, Maosheng; Zheng, Chenglong; Li, Jiahui; Huang, Jin; Li, Fuyu; Tang, Tingting; Dai, Haitao; Yao, Jianquan
Source:
Carbon 2020 v.163 pp. 34-42
ISSN:
0008-6223
Subject:
image analysis,   etc   ; circular dichroism spectroscopy; graphene;     Show all 3 Subjects
Abstract:
... Chiral metasurfaces can achieve giant chiral optical responses and have been expanded from the optical band to other electromagnetic bands. Here, we propose a new method for dynamic terahertz circular dichroism (CD) manipulation in metasurfaces. By introducing a patterned and electrically doped graphene into the metamirror consists of double layer C-shaped split ring resonators (SRRs), efficient t ...
DOI:
10.1016/j.carbon.2020.03.019

11. Photolysis dynamics of m- and o-fluorophenol: Substitution effects on tunneling mechanism

Author:
Deng, Xulan; Tang, Ying; Song, Xinli; Liu, Kai; Gu, Zhenfei; Zhang, Bing
Source:
Chemosphere 2020 v.253 pp. 126747
ISSN:
0045-6535
Subject:
image analysis,   etc   ; hydrogen bonding; kinetic energy; photolysis;     Show all 4 Subjects
Abstract:
... The photolysis dynamics of m-fluorophenol (m-FPhOH) and o-fluorophenol (o-FPhOH) have been investigated with time-resolved velocity map imaging (TR-VMI) and time-resolved ion-yield (TR-IY) techniques. Following excitation to the origin of S₁ (ππ∗) state of m- and o-FPhOH, H atoms elimination mediated by tunneling through the potential barrier under the S₁ (ππ∗)/S₂ (πσ∗) conical intersection (CI) h ...
DOI:
10.1016/j.chemosphere.2020.126747

12. General review of optical polarization remote sensing

Author:
Yan, Lei; Li, Yanfei; Chandrasekar, V.; Mortimer, Hugh; Peltoniemi, Jouni; Lin, Yi
Source:
International journal of remote sensing 2020 v.41 no.13 pp. 4853-4864
ISSN:
1366-5901
Subject:
image analysis,   etc   ; global change; remote sensing;     Show all 3 Subjects
Abstract:
... Polarization remote sensing can be used to obtain polarization data for a given target. It can be acquire not only radiation data, as also measured by conventional remote sensing, but also to quantify the polarization of the target according to its intrinsic characteristics. Polarization remote sensing allows for more accurate quantification of ground objects. The polarization pattern of the whole ...
DOI:
10.1080/01431161.2020.1724350

13. Permittivity estimation of a shallow-layered medium using high-resolution ground-penetrating radar

Author:
Bannawat, Lakkhana; Boonpoonga, Akkarat; Akkaraekthalin, Prayoot
Source:
International journal of remote sensing 2020 v.41 no.12 pp. 4626-4643
ISSN:
1366-5901
Subject:
image analysis,   etc   ; ground-penetrating radar; remote sensing;     Show all 3 Subjects
Abstract:
... This paper proposes a method of permittivity estimation using ground penetrating radar (GPR). The proposed method can estimate the permittivity of a shallow-layered medium. In the proposed method, antenna calibration is introduced to improve the vertical resolution of the GPR. The conventional surface reflection method is slightly modified to be suitable for operation at a shallow depth since the ...
DOI:
10.1080/01431161.2020.1723177

14. On the use of the SOS metaheuristic algorithm in hybrid image fusion methods to achieve optimum spectral fidelity

Author:
Serifoglu Yilmaz, Cigdem; Yilmaz, Volkan; Güngör, Oguz
Source:
International journal of remote sensing 2020 v.41 no.10 pp. 3993-4021
ISSN:
1366-5901
Subject:
image analysis,   etc   ; algorithms; color; remote sensing; wavelet;     Show all 5 Subjects
Abstract:
... Image fusion aims to spatially enhance a low-resolution multispectral (MS) image by utilizing a high-resolution panchromatic (Pan) band. Various image fusion methodologies have been proposed with the aim to improve the spatial detail quality without deteriorating the colour content of the input MS image. Previous studies revealed the fact that there is no such thing as ‘the best image fusion metho ...
DOI:
10.1080/01431161.2019.1711244

15. Impression formation via #foodporn: Effects of posting gender-stereotyped food pictures on instagram profiles

Author:
Cavazza, Nicoletta; Graziani, Anna Rita; Guidetti, Margherita
Source:
Appetite 2020 v.147 pp. 104565
ISSN:
0195-6663
Subject:
image analysis,   etc   ; cooking; gender; social networks; women;     Show all 5 Subjects
Abstract:
... Previous studies suggested that food may have gender connotations and plays an important role in impression formation. Since sharing food images through social networks is becoming more and more common, the aim of the present study was to examine whether such images influence observers' judgements of a target. Specifically, we hypothesised that posting images of gender-stereotyped dishes would aff ...
DOI:
10.1016/j.appet.2019.104565

16. Photoactivatable fluorescent probes for spatiotemporal-controlled biosensing and imaging

Author:
Zou, Zhen; Luo, Ziling; Xu, Xuan; Yang, Sheng; Qing, Zhihe; Liu, Juewen; Yang, Ronghua
Source:
Trends in analytical chemistry 2020 v.125 pp. 115811
ISSN:
0165-9936
Subject:
image analysis,   etc   ; enzyme activity; fluorescent dyes; medicine;     Show all 4 Subjects
Abstract:
... Designing fluorescent probes for accurately analyzing target molecules of interest become fascinating and vital in the view of biology and biomedicine. Conventional fluorescent probes are often obscured by the interference from biological autofluorescence, off-target effects, and a lack of spatiotemporal control. As a newly developed paradigm, photoactivatable fluorescent probes (PFPs), whose sens ...
DOI:
10.1016/j.trac.2020.115811

17. A systematic approach to quantitative Western blot analysis

Author:
Pillai-Kastoori, Lakshmi; Schutz-Geschwender, Amy R.; Harford, Jeff A.
Source:
Analytical biochemistry 2020 v.593 pp. 113608
ISSN:
0003-2697
Subject:
image analysis,   etc   ; Western blotting; antibodies; electrophoresis; proteins;     Show all 5 Subjects
Abstract:
... Attaining true quantitative data from WB requires that all the players involved in the procedure are quality controlled including the user. Appropriate protein extraction method, electrophoresis, and transfer of proteins, immunodetection of blotted protein by antibodies, and the ultimate step of imaging and analyzing the data is nothing short of a symphony. Like with any other technology in life-s ...
DOI:
10.1016/j.ab.2020.113608

18. Explaining the unsuitability of the kappa coefficient in the assessment and comparison of the accuracy of thematic maps obtained by image classification

Author:
Foody, Giles M.
Source:
Remote sensing of environment 2020 v.239 pp. 111630
ISSN:
0034-4257
Subject:
image analysis,   etc   ; mathematics; remote sensing; thematic maps;     Show all 4 Subjects
Abstract:
... The kappa coefficient is not an index of accuracy, indeed it is not an index of overall agreement but one of agreement beyond chance. Chance agreement is, however, irrelevant in an accuracy assessment and is anyway inappropriately modelled in the calculation of a kappa coefficient for typical remote sensing applications. The magnitude of a kappa coefficient is also difficult to interpret. Values t ...
DOI:
10.1016/j.rse.2019.111630

19. What is a remote sensing change detection technique? Towards a conceptual framework

Author:
Si Salah, Hayet; Goldin, Sally E.; Rezgui, Abdelmounaam; Nour El Islam, Bachari; Ait-Aoudia, Samy
Source:
International journal of remote sensing 2020 v.41 no.5 pp. 1788-1812
ISSN:
1366-5901
Subject:
image analysis,   etc   ; artificial intelligence; remote sensing;     Show all 3 Subjects
Abstract:
... Remote sensing change detection (RSCD) is the process of identifying changes between scenes of the same location acquired at different times. This is an active research area with a broad range of applications. Many change detection methods have been described in the literature, ranging from simple differencing to machine learning techniques. Faced with this large number of suggested techniques, re ...
DOI:
10.1080/01431161.2019.1674463

20. Rapid high resolution 3D imaging of expanded biological specimens with lattice light sheet microscopy

Author:
Tsai, Yun-Chi; Tang, Wei-Chun; Low, Christine Siok Lan; Liu, Yen-Ting; Wu, Jyun-Sian; Lee, Po-Yi; Chen, Lindsay Quinn; Lin, Yi-Ling; Kanchanawong, Pakorn; Gao, Liang; Chen, Bi-Chang
Source:
Methods 2020 v.174 pp. 11-19
ISSN:
1046-2023
Subject:
image analysis,   etc   ; isotropy; lighting; microscopes; microscopy; polymers;     Show all 6 Subjects
Abstract:
... Expansion microscopy was invented to surpass the optical diffraction limit by physically expanding biological specimens with swellable polymers. Due to the large sizes of expanded specimens, 3D imaging techniques that are capable to acquire large volumetric data rapidly at high spatial resolution are therefore required for expansion microscopy. Lattice light sheet microscopy (LLSM) was developed t ...
DOI:
10.1016/j.ymeth.2019.04.006