scholarly journals Angle-tolerant polarization controlled continuous color palette from all-dielectric nanograting in reflective mode

2021 ◽  
Author(s):  
Xufeng Gao ◽  
Qi Wang ◽  
Na Luo ◽  
Banglian Xu ◽  
Ruijin Hong ◽  
...  
Keyword(s):  
Color Palette

Fluorescent proteins for in vivo imaging, where's the biliverdin?

2020 ◽  
Vol 48 (6) ◽  
pp. 2657-2667
Author(s):  
Felipe Montecinos-Franjola ◽  
John Y. Lin ◽  
Erik A. Rodriguez
Keyword(s):  
Hydrogen Peroxide ◽  
In Vivo Imaging ◽  
Near Infrared ◽  
Fluorescent Protein ◽  
Fluorescent Proteins ◽  
Fluorescent Imaging ◽  
Infrared Light ◽  
Red Fluorescent Protein ◽  
Color Palette

Noninvasive fluorescent imaging requires far-red and near-infrared fluorescent proteins for deeper imaging. Near-infrared light penetrates biological tissue with blood vessels due to low absorbance, scattering, and reflection of light and has a greater signal-to-noise due to less autofluorescence. Far-red and near-infrared fluorescent proteins absorb light >600 nm to expand the color palette for imaging multiple biosensors and noninvasive in vivo imaging. The ideal fluorescent proteins are bright, photobleach minimally, express well in the desired cells, do not oligomerize, and generate or incorporate exogenous fluorophores efficiently. Coral-derived red fluorescent proteins require oxygen for fluorophore formation and release two hydrogen peroxide molecules. New fluorescent proteins based on phytochrome and phycobiliproteins use biliverdin IXα as fluorophores, do not require oxygen for maturation to image anaerobic organisms and tumor core, and do not generate hydrogen peroxide. The small Ultra-Red Fluorescent Protein (smURFP) was evolved from a cyanobacterial phycobiliprotein to covalently attach biliverdin as an exogenous fluorophore. The small Ultra-Red Fluorescent Protein is biophysically as bright as the enhanced green fluorescent protein, is exceptionally photostable, used for biosensor development, and visible in living mice. Novel applications of smURFP include in vitro protein diagnostics with attomolar (10−18 M) sensitivity, encapsulation in viral particles, and fluorescent protein nanoparticles. However, the availability of biliverdin limits the fluorescence of biliverdin-attaching fluorescent proteins; hence, extra biliverdin is needed to enhance brightness. New methods for improved biliverdin bioavailability are necessary to develop improved bright far-red and near-infrared fluorescent proteins for noninvasive imaging in vivo.

Color image approximation based on clustering a color palette and smoothing borders with splines and arcs

2018 ◽  
pp. 3-11
Author(s):  
D. Kasimov ◽  
◽  
A. Kuchuganov ◽  
V. Kuchuganov ◽  
P. Oskolkov ◽  
...  
Keyword(s):  
Color Image ◽  
Color Palette ◽  
Image Approximation

Color Trend Analysis using Machine Learning with Fashion Collection Images

2021 ◽  
pp. 0887302X2199594
Author(s):  
Ahyoung Han ◽  
Jihoon Kim ◽  
Jaehong Ahn
Keyword(s):  
Machine Learning ◽  
Trend Analysis ◽  
Image Data ◽  
Fashion Industry ◽  
Color Palette ◽  
Web Scraping ◽  
Design Variables ◽  
Sales Organizations ◽  
Fashion Designers ◽  
Selection Of

Fashion color trends are an essential marketing element that directly affect brand sales. Organizations such as Pantone have global authority over professional color standards by annually forecasting color palettes. However, the question remains whether fashion designers apply these colors in fashion shows that guide seasonal fashion trends. This study analyzed image data from fashion collections through machine learning to obtain measurable results by web-scraping catwalk images, separating body and clothing elements via machine learning, defining a selection of color chips using k-means algorithms, and analyzing the similarity between the Pantone color palette (16 colors) and the analysis color chips. The gap between the Pantone trends and the colors used in fashion collections were quantitatively analyzed and found to be significant. This study indicates the potential of machine learning within the fashion industry to guide production and suggests further research expand on other design variables.

scholarly journals Optimized Method for Mapping Inorganic Pigments by Means of Multispectral Imaging Combined with Hyperspectral Spectroscopy for the Study of Vincenzo Pasqualoni’s Wall Painting at the Basilica of S. Nicola in Carcere in Rome

Minerals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 839
Author(s):  
Lucilla Pronti ◽  
Giuseppe Capobianco ◽  
Margherita Vendittelli ◽  
Anna Candida Felici ◽  
Silvia Serranti ◽  
...  
Keyword(s):  
Multispectral Imaging ◽  
Imaging System ◽  
Principal Component ◽  
Reflectance Spectroscopy ◽  
Wall Painting ◽  
High Spectral Resolution ◽  
Spectral Difference ◽  
Color Palette ◽  
A Minor ◽  
Nir Reflectance Spectroscopy

Multispectral imaging is a preliminary screening technique for the study of paintings. Although it permits the identification of several mineral pigments by their spectral behavior, it is considered less performing concerning hyperspectral imaging, since a limited number of wavelengths are selected. In this work, we propose an optimized method to map the distribution of the mineral pigments used by Vincenzo Pasqualoni for his wall painting placed at the Basilica of S. Nicola in Carcere in Rome, combining UV/VIS/NIR reflectance spectroscopy and multispectral imaging. The first method (UV/VIS/NIR reflectance spectroscopy) allowed us to characterize pigment layers with a high spectral resolution; the second method (UV/VIS/NIR multispectral imaging) permitted the evaluation of the pigment distribution by utilizing a restricted number of wavelengths. Combining the results obtained from both devices was possible to obtain a distribution map of a pictorial layer with a high accuracy level of pigment recognition. The method involved the joint use of point-by-point hyperspectral spectroscopy and Principal Component Analysis (PCA) to identify the pigments in the color palette and evaluate the possibility to discriminate all the pigments recognized, using a minor number of wavelengths acquired through the multispectral imaging system. Finally, the distribution and the spectral difference of the different pigments recognized in the multispectral images, (in this case: red ochre, yellow ochre, orpiment, cobalt blue-based pigments, ultramarine and chrome green) were shown through PCA false-color images.

scholarly journals Lagrange Inversion and Combinatorial Species with Uncountable Color Palette

2021 ◽  
Author(s):  
Sabine Jansen ◽  
Tobias Kuna ◽  
Dimitrios Tsagkarogiannis
Keyword(s):  
Lagrange Inversion ◽  
Inversion Formulas ◽  
Color Palette

AbstractWe prove a multivariate Lagrange-Good formula for functionals of uncountably many variables and investigate its relation with inversion formulas using trees. We clarify the cancellations that take place between the two aforementioned formulas and draw connections with similar approaches in a range of applications.

Color and Coloristic Tasks in the Organization of the Methodology of Educational Projects in the Training of Architects and Designers at the University

2021 ◽  
pp. 57-61
Author(s):  
N. Ul'yanova
Keyword(s):  
Educational Activity ◽  
Project Work ◽  
Educational Work ◽  
Educational Design ◽  
Color Palette ◽  
Advantages And Disadvantages ◽  
Space Organization ◽  
Design Solutions ◽  
Architecture And Design ◽  
The University

The article is devoted to the meaning and use of the possibilities of color and pictorial combinations in architecture and design, when performing educational project tasks. The study examines the emerging problems in the organization of educational work. The purpose of the study is to create a comprehensive design methodology with the inclusion of a module of coloristic and color aspects. Possible methods of organizing project educational work are proposed. The advantages and disadvantages of performing these tasks are analyzed. The methods of project work are aimed at creating convenient and at the same time aesthetic architectural objects. The methods under consideration are based on practical work, which is the basis of any educational activity in the training of higher school specialists. When forming the educational methodology, the nature and technological possibilities of using color in the design of architectural and design solutions were taken into account. The presented project proposals are based on a practical experiment and demonstrate the possibilities of planning coloristic tasks. The study determines the problem based on the analysis of modern buildings and its architectural solutions. The analysis of this topic highlights the insufficient training of future specialists in the field of using the possibilities of color in architecture and design of residential and public buildings. The research suggests and analyzes artistic and aesthetic technologies of space organization. The results of the study put forward new tasks in the planning of educational design solutions, using color, harmony of the color palette, subordinate to the color and coloristic unity of the environment.

History of Azerbaijani carpets with classical composition

2021 ◽  
Vol 66 (05) ◽  
pp. 149-153
Author(s):  
Nigar Səfxan qızı Məhərrəmova ◽  
Keyword(s):  
Key Words ◽  
Golden Age ◽  
Historical Review ◽  
16Th Century ◽  
Color Palette ◽  
Miniature Painting ◽  
History Of

The article provides information about the historical review of Azerbaijani carpets and examines its stages. The 16th century is characterized as the Golden Age of Azerbaijani history and culture. The carpet weaving of that time combined the subtlety and wonder of miniature painting, the decorative-plan solution of traditional motifs, a magnificent color palette reflecting all the colors and diversity of nature. Key words: carpet, pattern, color, Islam, miniature painting, sufism, seljuk, component

Modeling of wave processes in closed water areas of shallow water areas

2021 ◽  
pp. 30-35
Author(s):  
Eugene Istomin ◽  
Valerii Mikheev ◽  
Yaroslav Petrov ◽  
Irma Martyn
Keyword(s):  
Water Area ◽  
Navier Stokes ◽  
Coastal Protection ◽  
Wave Processes ◽  
Color Palette ◽  
Continuity Equations ◽  
Port Area ◽  
Wave Heights ◽  
Closed Water ◽  
Hydrostatic Model

The article presents the developed non-stationary two-dimensional hydrostatic model of wave propagation in the water area of the port of the Bay of Five Hunters, protected by a coastal protection structure in the form of a jetty. The tasks of the work included the development of a model based on the Navier-Stokes and continuity equations and a long-range assessment of the possible impact of the wave situation on marine objects in the port area. At present, the provision of hydrometeorological predictive information is one of the most important factors in the effective operation of port waters. The results are presented graphically using a geographic information system, where different wave heights and maximum wave amplitudes are displayed using a color palette. The consistency of the obtained results is shown, and refraction, diffraction, and interference are noted for the incoming wavefront.

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