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1.
Braz. j. oral sci ; 22: e238082, Jan.-Dec. 2023. tab
Artículo en Inglés | LILACS, BBO - Odontología | ID: biblio-1393422

RESUMEN

Aim: To determine if the artificial staining with black tea (BT) influences the enamel microhardness before in-office bleaching and if BT staining is necessary to evaluate the efficacy of bleaching with 35% hydrogen peroxide Methods: Enamel/dentin blocks were randomized into groups according to the staining protocol (n=5/group): (CO) control ­ maintained in artificial saliva solution (AS); (BT4) immersed in black tea solution for 4 h; (BT24) immersed in black tea solution for 24 h. After the staining protocols, all specimens were kept in AS for one week, followed by bleaching (three sessions of HP application for 40 min). Knoop surface microhardness (kgF/mm2) was determined at baseline (T0), after staining (T1), after 7 days of storage in AS (T2), and after bleaching (T3). The color (∆E00) and coordinate changes (∆L, ∆a, ∆b) were measured using a digital spectrophotometer at T0 and T3. Data were submitted to one-way (∆E00, ∆L, ∆a, ∆b) or two-way ANOVA repeated measures (kgF/mm2) and Tukey's test (a=5%). Results: The staining protocols (BT4 and BT24) promoted significantly lower microhardness (T1 and T2, p<0.05) than CO, whereas CO was the only group to maintain microhardness values over time. Bleaching promoted perceptible ∆E00 without a significant difference among the groups regardless of the staining protocol (p=0.122). CO and BT4 showed no differences in terms of ∆L and ∆a (p>0.05), but BT4 displayed a higher ∆b than CO. Conclusion:The artificial staining with BT negatively affected the enamel surface microhardness and was not essential to evaluate the efficacy of 35% hydrogen peroxide bleaching


Asunto(s)
Coloración y Etiquetado , Té/efectos adversos , Blanqueamiento de Dientes , Color , Esmalte Dental , Blanqueadores , Pruebas de Dureza , Peróxido de Hidrógeno
2.
Braz. j. oral sci ; 21: e222812, jan.-dez. 2022. tab
Artículo en Inglés | LILACS, BBO - Odontología | ID: biblio-1348712

RESUMEN

Aim: To evaluate the influence of the parameters L* a* b* on the variation of the color of bovine tooth enamel submitted to artificial darkening, after simulated brushing, with whitening toothpastes containing blue covarine. Methods: To undertake this study in vitro, 60 specimens (SP) were divided into 6 groups (n=10): control group (CGwater) and 5 test groups (GT1-Colgate Total 12, GT2-Oral-B 3D White Perfection, GT3- Colgate Luminous Instant White, GT4-CloseUp White Diamond Attraction, GT5-Sorriso Xtreme White). The specimens were darkened with coffee and submitted to simulated brushing for 6, 12, and 24 months. The alteration in the color was evaluated using CIELAB parameters and the ΔL, Δa, Δb and ΔE were calculated. The data was analyzed through generalized linear models using the R program and considering a level of significance of 5%. Results: The parameters L*, a* and the ΔL, Δa obtained better results in the test group than in the control group. There were no statistical differences between CG and the test groups for the evaluation of the b* parameter. In the evaluation of the Δb, the GT3 differed statistically from the CG. In relation to the ΔE, all the group tests showed a variation in color statistically greater than that of the CG and the GT4 showed the greatest variation, not differing from the GT3 during the periods studied. Conclusion: The mechanical and optical whitening agents positively influenced the values L*a* and b*, as well as in its variations and in the ΔE. It is important to emphasize, however, that to analyze tooth whitening it is necessary to evaluate their parameters together


Asunto(s)
Diente , Pastas de Dientes , Color , Blanqueadores
3.
Braz. j. oral sci ; 21: e224265, jan.-dez. 2022. tab
Artículo en Inglés | LILACS, BBO - Odontología | ID: biblio-1354719

RESUMEN

Aim: This study assessed the color and translucency stability of a polymer infiltrated ceramic network (PICN) and compared it with a resin composite (RC) and a feldspathic ceramic (FEL). Methods: Disc-shaped samples of a PICN (Vita Enamic), a feldspathic ceramic (Vitablocks Mark II), and a resin composite (Brava block) were prepared from CAD/CAM blocks. PICN and RC surfaces were finished with a sequence of polishing discs and diamond paste. FEL samples received a glaze layer. The samples were subjected to 30-min immersions in red wine twice a day for 30 days. CIEL*a*b* coordinates were assessed with a spectrophotometer at baseline and after 15 and 30 days of immersion. Color alteration (ΔE00) and translucency parameter (TP00) were calculated with CIEDE2000. Average roughness was measured before the staining procedures. Color difference and translucency data were analyzed with repeated-measures ANOVA and Tukey's tests. Roughness was analyzed with the Kruskal-Wallis test. Results: Roughness was similar among the experimental groups. All materials had their color alteration significantly increased from 15 to 30 days of staining. PICN reached an intermediate ΔE00 between FEL and RC at 15 days. PICN revealed a color alteration as high as the composite after 30 days. No statistical difference was observed regarding translucency. Conclusion: PICN was not as color stable as the feldspathic ceramic at the end of the study. Its color alteration was comparable to the resin composite when exposed to red wine. However, the translucency of the tested materials was stable throughout the 30-day staining


Asunto(s)
Propiedades de Superficie , Ensayo de Materiales , Cerámica , Diseño Asistido por Computadora , Color , Resinas Compuestas
4.
Braz. j. oral sci ; 21: e225946, jan.-dez. 2022. ilus
Artículo en Inglés | LILACS, BBO - Odontología | ID: biblio-1384159

RESUMEN

Aim This study aims to evaluate and validate the sensibility and the level of agreement between different gingival color measures obtained by a spectrophotometer (SPECTRO) and a photography (PHOTO) method. Methods Among 40 patients, the color was measured 2 mm apical to the gingival margin by CIE L*, a*, b* system using a reflectance spectrophotometer and the photography's plus software. The level of agreement between three different measures (m1, m2, m3) in parameters L*, a*, b*, and ∆E (color variation) was evaluated by random and systematic errors, as well as the limits and coefficient of concordance. A comparison between the methods was performed by the Bland-Altman test and the sensibility level was evaluated accordingly to the ∆E: 3.7 thresholds with p<0.05 as the level of significance for these comparisons. Results The SPECTRO method has not presented the systematic error (p>0.05) and had reproducibly and agreement level in three variable measures L* (r: 0.6), a* (r: 0.3), and b* (r: 0.5) as to the PHOTO method L* (r: 0.6), a* (r: 0.5), and b* (r: 0.5), which presented systematic error in L* values (p<0.05). The means of ∆E between measurements were: 6.5 SPECTRO and 5.9 PHOTO. There was no good level of sensitivity ∆E> 3.7 and agreement between the methods, mainly for the a* values. On the other hand, for the L* and in for the most comparisons of b* values, the level of agreement was higher. Conclusion Both methods could quantify the gingival color from the coordinates L *, a *, and b *, which has shown greater reliability between the measurements acquired by the SPECTRO method.


Asunto(s)
Humanos , Masculino , Femenino , Adulto , Persona de Mediana Edad , Espectrofotómetros , Color , Fotografía Dental , Encía , Incisivo
5.
Sci Rep ; 12(1): 15253, 2022 Sep 09.
Artículo en Inglés | MEDLINE | ID: mdl-36085349

RESUMEN

Basket clam soup, a popular Asian dish, is prepared by boiling clams in hot water. The soup is generally cloudy, and it is considered that increased cloudiness enhances taste. However, the composition of the whitening ingredients and their association with taste enhancement remains unclear. In this study, we aimed to identify the components contributing to the white colour of the boiled soup. The white component upon precipitation with trichloroacetic acid reacted positively with ninhydrin, indicating the presence of proteins. The separation of proteins using sodium dodecyl sulphate-polyacrylamide gel electrophoresis revealed an intense band of size 33 kDa. Peptide mass fingerprinting of the identified protein using matrix-assisted laser desorption/ionisation-time-of-flight tandem mass spectrometry revealed the protein as tropomyosin. To validate the involvement of tropomyosin in the turbidity of the soup, tropomyosin was expressed and extracted from Escherichia coli. As expected, the purified protein suspended in water resulted in turbid appearance. To determine whether lipids have any association with the observed cloudiness of the soup, the amounts of fatty acids were measured. The proportion of estimated fatty acids was very low compared to that of proteins. Overall, we identified the major component contributing to soup cloudiness as tropomyosin forming micelles.


Asunto(s)
Forunculosis , Tropomiosina , Animales , Color , Escherichia coli , Ácidos Grasos , Micelas , Alimentos Marinos , Mariscos , Agua
6.
BMJ Open ; 12(9): e064202, 2022 Sep 21.
Artículo en Inglés | MEDLINE | ID: mdl-36130742

RESUMEN

OBJECTIVES: To explore how cigarette packet branding and colours influence young male smokers' perceptions of tobacco brands in Cambodia. DESIGN: Mixed-methods study. SETTING: Worksites, living accommodations, a university and public locations in Phnom Penh, Cambodia. PARTICIPANTS: 147 male Cambodian smokers (18-24 years). INTERVENTIONS: Participants were shown mock-up pictures of different cigarette packet branding and colour variations and asked to respond to close-ended and short-response questions. OUTCOME MEASURES: Brand recognition, appeal and harm perceptions of cigarette packet branding and colours. RESULTS: When shown three packets with brand names removed, 98.6% of participants recognised packet one as Mevius brand, 21.1% recognised packet two as Marlboro and 38.8% recognised packet three as 555. For the three fully-branded and three matching plain packets, most participants selected a fully-branded packet as the most appealing taste (83.0%) and most appealing to youth (81.7%). Participants described their chosen brand as appealing due to beliefs about its superior taste/quality, reduced harm and symbolic attitudes surrounding tobacco brands and smokers of different brands in a social status hierarchy. When shown six different colours of unbranded packets, participants selected the blue packet (51.0%) as the most appealing for taste, the white packet as the least harmful (25.2%), and the red (15.0%) and black (12.9%) packets as the most harmful to health. They described their associations of packet colours with abstract imagery concerning smoking-related harms and their future well-being. CONCLUSIONS: Findings suggest that packet branding and colours influence young male smokers' recognition, appeal and harm perceptions of tobacco brands in Cambodia and remain an influential marketing tool for tobacco companies where advertising is banned. Consequently, Cambodia and other low and middle-income countries in Southeast Asia should implement plain packaging.


Asunto(s)
Fumadores , Productos de Tabaco , Adolescente , Cambodia , Color , Humanos , Masculino , Embalaje de Productos/métodos , Tabaco
7.
J Environ Public Health ; 2022: 8493528, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36133171

RESUMEN

The naive Bayes classification algorithm is used to determine the plane feature vector, and the color image enhancement algorithm based on the visual characteristics is used to improve the local contrast of the plane visual image. In addition, based on the visual perception intensity of each region of the interactive interface and the importance of visual perception elements in the edge contour, a hierarchical optimization model of graphical HMI is established, which is solved by the genetic algorithm. Finally, it has been proved that this system has high efficiency in image color processing, and the image enhancement effect is better, which meets the requirements of human visual perception. The contribution of this study lies in the design of the human-computer interface plane visual image color enhancement system, so as to improve the visual effect of plane visual image color.


Asunto(s)
Inteligencia Artificial , Aumento de la Imagen , Teorema de Bayes , Color , Humanos , Aumento de la Imagen/métodos , Tecnología
8.
Zootaxa ; 5134(3): 301-354, 2022 May 11.
Artículo en Inglés | MEDLINE | ID: mdl-36101062

RESUMEN

African reed frogs are widespread and highly polymorphic for colour pattern. The Hyperolius viridiflavus complex includes 121 described taxa, including subspecies, which are presently synonymised as 16 species. However, the taxonomy is confused as colour patterns have been used to identify species, despite an inadequate understanding of pattern variation and overlap. This study examined 267 sequences of the 16S rRNA fragment from individuals across the range of the group, from Senegal to Ethiopia, and to the southern tip of Africa. Maximum likelihood analysis showed that there were 14 species that only partially agreed with existing taxonomy. This study recognised the following species: Hyperolius viridiflavus, H. marmoratus, H. marginatus, H. parallelus, H. nitidulus, H. glandicolor, H. tuberculatus, H. mariae, H. noblei, H. goetzei, H. spatzi, H. bangwae, H. dintelmanni and an undescribed species from southern Cameroon. Hyperolius swynnertoni was found to be embedded within H. marmoratus, H. hutsebauti was embedded within H. parallelus, H. rhodesianus and H. pyrrhodictyon were embedded within H. marginatus and H. sheldricki was embedded within H. glandicolor. There was no sequence information to determine the status of Hyperolius nimbae. The ranges of the species are presented, although these are expected to change as more sequences become available. The use of DNA sequences to identify animals is recommended in this group, as the variation in advertisement calls and morphology is not well understood.


Asunto(s)
Anuros , ADN Mitocondrial , Animales , Color , ADN Mitocondrial/genética , ARN Ribosómico 16S/genética
9.
Philos Trans R Soc Lond B Biol Sci ; 377(1862): 20210286, 2022 10 24.
Artículo en Inglés | MEDLINE | ID: mdl-36058239

RESUMEN

Colour constancy is the ability to recognize the colour of objects despite spectral changes in the natural illumination. As such, this phenomenon is important for most organisms with good colour vision, and it has been intensively studied in humans and primates. Colour constancy is also documented for several species of insects, which is not surprising given the ecological importance of colour vision. But how do insects, with their small brains, solve the complex problem of colour vision and colour constancy? In an interspecies approach, this review reports on behavioural studies on colour constancy in bees, butterflies, moths and humans, corresponding computational models and possible neurophysiological correlates. This article is part of the theme issue 'Understanding colour vision: molecular, physiological, neuronal and behavioural studies in arthropods'.


Asunto(s)
Mariposas Diurnas , Visión de Colores , Animales , Abejas , Color , Percepción de Color/fisiología , Humanos , Insectos
10.
Philos Trans R Soc Lond B Biol Sci ; 377(1862): 20210283, 2022 10 24.
Artículo en Inglés | MEDLINE | ID: mdl-36058244

RESUMEN

Aphids are economically and ecologically important herbivorous insects. A critical step in their life cycle is the visually guided host finding behaviour. To elucidate the role of colour in host finding of aphid spring migrants we conducted large colour trap experiments in the field and analysed aphid catch data, using trap spectral reflectance data as input. Based on known and putative photoreceptor sensitivities we developed and optimized a simple empirical colour choice model for spring migrants of different aphid species which confirmed and explained the yellow preference of these insects. In a further step, we applied multivariate statistical methods to behavioural and reflectance data, but without data on photoreceptor sensitivities, to find the wavelengths of greatest importance for the aphids' behavioural responses. This analysis confirmed the position of the green photoreceptor peak previously obtained independently with electrophysiological methods. In a final step, we applied the colour preference model to a dataset of leaf spectra. This showed that aphid visual preference would be dependent on the plants' nutritional status, with lower nitrogen input being associated with stronger preference, despite known benefits of high nitrogen levels for aphid reproduction and fitness. Ecological and evolutionary implications of these results are discussed. This article is part of the theme issue 'Understanding colour vision: molecular, physiological, neuronal and behavioural studies in arthropods'.


Asunto(s)
Áfidos , Animales , Áfidos/fisiología , Color , Herbivoria , Insectos , Nitrógeno , Estaciones del Año
11.
Philos Trans R Soc Lond B Biol Sci ; 377(1862): 20210284, 2022 10 24.
Artículo en Inglés | MEDLINE | ID: mdl-36058248

RESUMEN

Bees discriminate between many different colours of flower petals, but it is not well understood how they perceive and learn patterns frequently found in flowers with colourful structures. We used multi-spectral imaging to explore chromatic cues in concentric flower patterns as they are seen through the low-resolution eyes of the honeybee. We find a diversity of colour combinations, which suggests that plants might exploit the sensory capabilities of pollinators, like bees, that learn colours easily. A consistent feature is that the surround of the pattern has a stronger chromatic contrast to the foliage background than the centre. This can potentially facilitate the fast identification of floral objects within colourful scenes when a foraging bee moves through a flower patch. In behavioural experiments we trained and tested bees with three types of concentric patterns. They recognized and discriminated patterns accurately in most tests, relying flexibly on both chromatic and spatial cues. Only rarely, depending on the training stimulus, chromatic cues determined their choices whilst pattern cues were ignored. The variability of floral designs and the bees' flexibility in recalling colour and spatial information suggest a role for colour vision in pattern processing. Implications for the signalling strategies of flowers are discussed. This article is part of the theme issue 'Understanding colour vision: molecular, physiological, neuronal and behavioural studies in arthropods'.


Asunto(s)
Flores , Polinización , Animales , Abejas , Color , Condicionamiento Clásico , Señales (Psicología) , Flores/fisiología , Polinización/fisiología
12.
Philos Trans R Soc Lond B Biol Sci ; 377(1862): 20210280, 2022 10 24.
Artículo en Inglés | MEDLINE | ID: mdl-36058250

RESUMEN

Colour vision represents a vital aspect of perception that ultimately enables a wide variety of species to thrive in the natural world. However, unified methods for constructing chromatic visual stimuli in a laboratory setting are lacking. Here, we present stimulus design methods and an accompanying programming package to efficiently probe the colour space of any species in which the photoreceptor spectral sensitivities are known. Our hardware-agnostic approach incorporates photoreceptor models within the framework of the principle of univariance. This enables experimenters to identify the most effective way to combine multiple light sources to create desired distributions of light, and thus easily construct relevant stimuli for mapping the colour space of an organism. We include methodology to handle uncertainty of photoreceptor spectral sensitivity as well as to optimally reconstruct hyperspectral images given recent hardware advances. Our methods support broad applications in colour vision science and provide a framework for uniform stimulus designs across experimental systems. This article is part of the theme issue 'Understanding colour vision: molecular, physiological, neuronal and behavioural studies in arthropods'.


Asunto(s)
Percepción de Color , Visión de Colores , Animales , Color , Percepción de Color/fisiología
13.
Artículo en Inglés | MEDLINE | ID: mdl-36078692

RESUMEN

From the perspective of emotional preference, studies have been conducted about landscape healing for subhealth people in the National High-Tech Zone (the study area). Combined with a preliminary practice investigation, Unity 2019 was used to make a digital roaming landscape, and 91 subjects with a history of mental subhealth diseases were randomly invited to participate in the immersive experimentation of the Human-Machine Environment Synchronisation (ErgoLAB) platform. After the experiment, the subjects were invited to fill in a Likert scale as the control group. The interest preference, emotion fluctuation, and healing effect of landscape colour were verified. The results show that: (1) The variation trend of interest reflected the concentration of interest in landscape, and the order of degree of interest, ranging from high to low, went Green > Yellow > Blue > Red > Orange > Purple > Cyan. (2) The subjects' interest in landscape colour was correlated with the arousal of positive emotions. The correlation between interest in landscape colour and positive emotions, from high to low, went Blue > Green > Yellow, while the correlation between red, cyan, orange, and purple was not significant. (3) The mean skin conductance (SC) fluctuation variance of subjects was 5.594%, which confirmed that the healing effect of digital roaming landscape scenes was significant under the state of low arousal. According to the Likert scale data, subjects' scores of the healing effect of landscapes, from high to low, went as follows: Green > Yellow > Red > Blue > Cyan > Orange > Purple. The results provide a new method for demonstrating the logical relationship between the digital landscape interest experience-emotional awakening-healing effect and providing a theoretical method and construction scheme for landscape colour configuration in the implementation of landscape healing projects.


Asunto(s)
Percepción de Color , Emociones , Nivel de Alerta , Color , Humanos
14.
Molecules ; 27(17)2022 Aug 25.
Artículo en Inglés | MEDLINE | ID: mdl-36080201

RESUMEN

Liquidambar formosana Hance has a highly ornamental value as an important urban greening tree species with bright and beautiful leaf color. To gain insights into the physiological and molecular mechanisms of L. formosana leaf color change, the leaves of three different clones were sampled every ten days from October 13, 2019, five times in total, which are S1, S2, S3, S4 and S5. Transcriptome sequencing was performed at S1 and S4. The chlorophyll content of the three clones decreased significantly, while the anthocyanins content of the three clones increased significantly in the coloring stage. The anthocyanins content of clone 2 was far more than that of the other two clones throughout the period of leaf color change. The transcriptome analysis showed that six DEGs related to anthocyanins biosynthesis, including CHS (chalcone synthase), CHI (chalcone isomerase), F3'H (flavonoid 3'-hydroxylase), DFR (dihydroflavonol 4-reductase), ANS (anthocyanidin synthase) and FLS (flavonol synthase), were found in three clones. Clone 2 has another three DEGs related to anthocyanins biosynthesis, including PAL (Phenylalanine ammonia-lyase), F3'5'H (flavonoid 3',5'-hydroxylase) and UFGT (flavonoid 3-O-glucosyltransferase). We lay a foundation for understanding the molecular regulation mechanism of the formation of leaf color by exploring valuable genes, which is helpful for L. formosana breeding.


Asunto(s)
Antocianinas , Liquidambar , Antocianinas/genética , Color , Perfilación de la Expresión Génica , Regulación de la Expresión Génica de las Plantas , Liquidambar/genética , Liquidambar/metabolismo , Fitomejoramiento , Hojas de la Planta/genética , Hojas de la Planta/metabolismo , Proteínas de Plantas/metabolismo , Transcriptoma/genética
15.
Molecules ; 27(17)2022 Aug 26.
Artículo en Inglés | MEDLINE | ID: mdl-36080257

RESUMEN

Intermolecular copigmentation denotes the interaction between colored anthocyanins and the colorless copigment, which is not bound covalently to the anthocyanin molecule. This is the first study to investigate the effect of intermolecular copigmentation on the stability of individual anthocyanins from dried blackcurrant pomace (DBP) using four pure phenolic acids as copigments (ferulic, caffeic, chlorogenic, and rosmarinic acid). Studies were performed at pH 3.0 and pH 6.0, with a copigment/anthocyanin extract molar ratio of 5:1, during storage at 20 °C. At both pH 3.0 and 6.0, rosmarinic acid showed the strongest hyperchromic and bathochromic effects (p < 0.05) on day 0. However, rosmarinic acid showed low stability during storage. At pH 3.0, chlorogenic acid and control samples were capable of maintaining very high levels of total anthocyanin stability during storage (p < 0.05). On the other hand, ferulic acid and control samples had the longest estimated half-life during storage at pH 6.0. Intermolecular copigmentation successfully increased the half-life, color retention, and antioxidant activity of the anthocyanin solution, with cyanidin-3-O-glucoside (C3G) exhibiting the highest stability at both pH values. Overall, anthocyanins from DBP, in combination with chlorogenic or ferulic acid, showed potential for use in commercial food applications.


Asunto(s)
Antocianinas , Ribes , Antocianinas/química , Ácido Clorogénico , Color , Extractos Vegetales/química
16.
Sensors (Basel) ; 22(17)2022 Aug 29.
Artículo en Inglés | MEDLINE | ID: mdl-36080948

RESUMEN

UAVs are sensor platforms increasingly used in precision agriculture, especially for crop and environmental monitoring using photogrammetry. In this work, light drone flights were performed on three consecutive days (with different weather conditions) on an experimental agricultural field to evaluate the photogrammetric performances due to colour calibration. Thirty random reconstructions from the three days and six different areas of the field were performed. The results showed that calibrated orthophotos appeared greener and brighter than the uncalibrated ones, better representing the actual colours of the scene. Parameter reporting errors were always lower in the calibrated reconstructions and the other quantitative parameters were always lower in the non-calibrated ones, in particular, significant differences were observed in the percentage of camera stations on the total number of images and the reprojection error. The results obtained showed that it is possible to obtain better orthophotos, by means of a calibration algorithm, to rectify the atmospheric conditions that affect the image obtained. This proposed colour calibration protocol could be useful when integrated into robotic platforms and sensors for the exploration and monitoring of different environments.


Asunto(s)
Algoritmos , Fotogrametría , Agricultura , Calibración , Color , Fotogrametría/métodos
17.
Sensors (Basel) ; 22(17)2022 Sep 03.
Artículo en Inglés | MEDLINE | ID: mdl-36081120

RESUMEN

Color is an essential feature in histogram-based matching. This can be extracted as statistical data during the comparison process. Although the applicability of color features in histogram-based techniques has been proven, position information is lacking during the matching process. We present a conceptually simple and effective method called multiple-layered absent color indexing (ABC-ML) for template matching. Apparent and absent color histograms are obtained from the original color histogram, where the absent colors belong to low-frequency or vacant bins. To determine the color range of compared images, we propose a total color space (TCS) that can determine the operating range of the histogram bins. Furthermore, we invert the absent colors to obtain the properties of these colors using threshold hT. Then, we compute the similarity using the intersection. A multiple-layered structure is proposed against the shift issue in histogram-based approaches. Each layer is constructed using the isotonic principle. Thus, absent color indexing and multiple-layered structure are combined to solve the precision problem. Our experiments on real-world images and open data demonstrated that they have produced state-of-the-art results. Moreover, they retained the histogram merits of robustness in cases of deformation and scaling.


Asunto(s)
Interpretación de Imagen Asistida por Computador , Reconocimiento de Normas Patrones Automatizadas , Algoritmos , Color , Aumento de la Imagen/métodos , Interpretación de Imagen Asistida por Computador/métodos , Reconocimiento de Normas Patrones Automatizadas/métodos , Reproducibilidad de los Resultados , Sensibilidad y Especificidad
18.
J Environ Public Health ; 2022: 1151676, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36081422

RESUMEN

Since lacquer painting first appeared in the world of art, research into it has grown steadily. People have developed a keen interest in modern lacquer painting as a result of the extensive study of lacquer culture in both domestic and international academic circles. Many artists and art enthusiasts have contributed significantly to the study and research of lacquer painting and have made helpful attempts at modern lacquer painting. But it is challenging to describe the emotion that a lacquer painting's color conveys. This paper presents a decision-making framework for emotional cognitive learning based on the theory of emotional cognitive evaluation because there are relatively few researchers who have specifically studied the relationship between the creation of lacquer paintings and emotions and because there are also few research materials and documents for reference. The assessment of an emotional state is the central component of this framework. The observation module in the model framework is used to gather the emotional data that the lacquer painting expresses. The issue of emotional expression in lacquer painting is resolved by the emotional evaluation system, which combines the preprocessed information with prior knowledge to evaluate. The importance of affective cognitive expression in lacquer painting and the necessity of affective computing in the fields of machine learning and decision control is obtained on the basis of discussing the research status and content of affective cognition and affective computing. The efficiency of expression was increased by 1.3 percent as a result.


Asunto(s)
Laca , Pinturas , Cognición , Color , Humanos
19.
Environ Monit Assess ; 194(10): 726, 2022 Sep 05.
Artículo en Inglés | MEDLINE | ID: mdl-36063235

RESUMEN

A procedure is presented and discussed that highlights the use of the Nix Pro Color Sensor ("Nix") in digitizing soil colors with applications for forested wetland soils. Informed by our soil color investigations using both the Munsell Soil Color Chart (MSCC) and the Nix in forested wetlands of the northern Virginia area, we crafted a standard operating procedure (SOP), adaptable to various locations and/or soil types, that guides users-regardless of knowledge of soil ecology or familiarity with the Nix-to successfully assess and monitor soil colors at various depths. Our SOP outlines steps for digitally collecting, storing, and sharing soil color data. Through the implementation of this procedure, soil color monitoring can enter the digital age, removing barriers of entry to soil color determination and enhancing individuals' interest in monitoring and understanding of the importance of soil color as an environmental and ecological indicator. With continued refinement and adaptation to intended use, the SOP herein presented has the potential to aid wetland/watershed assessment by providing data on soil colors that can be tracked over time while also encouraging public engagement in environmental monitoring of soils.


Asunto(s)
Suelo , Humedales , Color , Monitoreo del Ambiente/métodos , Bosques , Humanos
20.
Food Res Int ; 160: 111704, 2022 10.
Artículo en Inglés | MEDLINE | ID: mdl-36076455

RESUMEN

A similar color change to meat would promote the appetite of consumers for meat analogs. In this study, three-dimensional (3D) printable colorant-containing meat analogs were developed to mimic the red and brown color of meat before and after cooking. These color changes were realized based on the thermal lability of beet red and the Maillard reaction. Moreover, we studied the influence of the addition of xylose on the shear modulus, printing performance, color, texture, chemical structure, and microstructure of colorant-containing meat analogs. Upon increasing the amount of xylose added, the raw colorant-containing meat analogs showed an increase in shear modulus, dimensional stability, and hardness; whereas, cooked colorant-containing meat analogs showed an increase in hardness, and a decrease in lightness, yellowness, hue angle, and chroma. Moreover, adding xylose changed the interactions and microstructure of colorant-containing meat analogs, leading to texture changes. This study would provide guidelines for the color and texture change by adding reducing saccharides to protein-rich gels.


Asunto(s)
Vigna , Xilosa , Color , Carne , Impresión Tridimensional
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