Many challenges hinder the historical study of early modern color. These essays offer a way forward through the category of 'color worlds'--constituted by practices, concepts and objects--and examine ...the emergence of the languages and objects used to communicate between them.
Cinema and Colour: The Saturated Image is a major new critical study of the use of colour in cinema. Using the dialectic of colour and monochrome as a starting point, Paul Coates explores the ...symbolic meanings that colour bears in different cultures, and engages with a range of critical approaches to filmic colour, building on the work of such theorists as Sergei Eisenstein, Rudolf Arnheim and Stanley Cavell. Coates also provides close analyses of films by directors such as Antonioni, Bergman, Godard, Hitchcock, Hou Hsiao-Hsien, Sirk, Kieslowski, Tarkovsky, Von Trier and Zhang Yimou. Coates' focus is on films that deliberately exploit the rich multiplicity of cultural meanings and associations ascribed to colour, including All That Heaven Allows, Deux ou trois choses que je sais d'elle, The Double Life of Véronique, The Flight of the Red Balloon, Red Desert, Schindler's List, Silent Light, Solaris, The Three Colours Trilogy and The Wizard of Oz.
A tunable Fabry–Pérot resonator is realized using metal–insulator–metal structure, in which the insulator is chitosan hydrogel. The chitosan swells in response to changes in relative humidity; this ...change affects transmissive structural color of the multilayer structure. This tunable resonator is utilized for a humidity sensor combined with a photovoltaic cell. The change in current through the photovoltaic cell provides rapid precise measurement of relative humidity, and the change in color of the multilayer provides an approximate, remotely‐readable estimate. The response requires no power, so the device has numerous sensing applications.
Tunable interferometric colors are realized by silver–chitosan–silver Fabry–Pérot resonators. The chitosan is stimuli‐responsive to external vapor, so it is swollen and deswollen in response to humidity condition. Therefore, the peak of transmission shifts as humidity changes. As proof of concept, a real‐time colorimetric humidity sensor combined with a photovoltaic cell is demonstrated.
This study aims to research the effect of the interface background color choice on the emotion of university students. The study group consisted of 929 Turkish students studying at the vocational ...colleges of technical and social sciences in Çanakkale Onsekiz Mart University, Turkey. In this study, the descriptive method was used. A color effect form developed by the researcher was used. The validity of the tool was controlled by the faculty members in the Guidance and Psychological Counseling Department of Canakkale Onsekiz Mart University. The analysis of the findings showed that primary, secondary, and tertiary colors had positive impacts on the participants' perceptions except for gray color. In this negative perception, the boredom perception of the gray was affective. The colors having the most positive perceptions of the participants were white, blue, and red. In the positive perception of these colors, their perception of relaxing and encouraging was effective. In the colors' effect, there were significant differences according to the gender and academic education department. Red, black, white, gray, and purple colors' effect changed according to gender, while red, blue, and purple colors' effect changed according to the education department. As a result, this study, which is conducted with the participation of a large number and the usage of software, is expected to be a good reference on color perception and color design for software interface designers.
What makes a colored image, e.g. an abstract painting or a landscape, look pleasing? We hypothesized that a preference for complex color compositions, such as paintings and images of natural scenes, ...might be related to how natural the colors are perceived. We tested this possibility with two experiments in which the degree of naturalness of images was manipulated by rotating their color gamut rigidly in the color space CIELAB. This changed just the hue composition, but preserved saturation and lightness. In the first experiment we obtained individual scaling curves for perceived naturalness and for preference as a function of the angle of gamut rotation for a small set of images. The naturalness and preference scaling curves were found to be largely similar and their maxima were close to the original image. In the second experiment, we tested whether this effect generalized to a larger set of images. We used a simultaneous 5AFC procedure where in each trial participants had to select the most natural or the most preferred image from five different rotations of the color gamut. The results confirmed the first experiment and showed that, in general, the images perceived as the more natural tend to be the ones that are preferred. Together these results show that perceived naturalness and preference are indeed perceptually closely related and may be driven by related mechanisms.
Progress in Colour Studies Biggam, Carole P; Paramei, Galina V; MacDonald, Lindsay W
2018, 2018-11-26
eBook
This volume presents authoritative and up-to-date research in colour studies by specialists across a wide range of academic disciplines, including vision science, psychology, psycholinguistics, ...linguistics, anthropology, onomastics, philosophy, archaeology and design.
•Discrimination loss of dichromats is influenced by the orientation of gamut.•The loss was lower around a yellow-green axis.•The orientation of the gamut impacts response times similarly.
In natural ...scenes, visual discrimination of colored surfaces by individuals with X-linked dichromacy is known to be only a little poorer than in normal trichromacy. This surprising result may be related to the properties of the colors of these scenes, like the shape and orientation of the color gamut, uneven frequency, and a considerable variation in lightness. It is unclear, however, how much each of these factors contributes to the small impairment in discrimination, in particular, what is the contribution of the orientation of the gamut. We measured the discrimination of colors from natural scenes by six normal trichromats and six dichromats. Colors were drawn either from the original color gamut of the scenes or from gamut-rotated versions of the scenes. Pairs of colors were randomly drawn from hyperspectral images of one rural and one urban environment and presented on a screen. As expected, dichromats were only a little poorer than normal trichromats at discrimination but the disadvantage varied systematically with the orientation of the color gamut by a factor of about three with a minimum around a yellow-green axis. Dichromats also took longer to respond, and the response times were modulated with the orientation of the color gamut in a similar way as the loss in discrimination. For the scenes tested here, these results imply an important impact of the orientation of the gamut on discrimination. They also indicate that the predominantly yellow-blue orientation of the gamut of natural scene might not be optimal for discrimination in dichromacy.
Dichromacy impairs color vision and impoverishes the discrimination of surface colors in natural scenes. Computational estimates based on hyperspectral imaging data from natural scenes suggest that ...dichromats can discriminate only about 10% of the colors discriminated by normal trichromats. These estimates, however, assume that the colors are equally frequent. Yet, pairs of colors confused by dichromats may be rare and thus have small impact on overall perceived chromatic diversity. This study estimated, empirically, how much dichromats are disadvantaged in discriminating surface colors drawn from natural scenes. The stimulus for the experiment was a scene made of real three-dimensional objects painted with matte white paint and illuminated by a spectrally tunable light source. In each trial the observers saw the scene illuminated by two spectra in two successive time intervals and had to indicate whether the colors perceived in the objects in the two intervals were the same or different. The spectra were drawn randomly from hyperspectral data of natural scenes and therefore represented natural spectral statistics. Four normal trichromats and four dichromats carried out the experiment. It was found that the number of pairs that could be discriminated by dichromats was almost 70% of those discriminated by normal trichromats, a proportion much higher than anticipated from estimates of discernible colors. Moreover, data from model simulations show that normal trichromats and dichromats use lightness differences for discrimination in about 40% and 50% of the discriminable pairs, respectively. Together these results suggest that the color distributions of natural scenes benefit the color vision of dichromats.
Winner of College Art Association's Wyeth Foundation for American Art Publication Grant Epic Landscapes is the first study devoted to architect Benjamin Henry Latrobe's substantial artistic oeuvre ...from 1795, when he set sail from Britain to Virginia, to late 1798, when he relocated to Pennsylvania. Thus, this book offers the only extended consideration of Latrobe's Virginian watercolors, including a series of complex trompe l'oeil studies and three significant illustrated manuscripts. Though Latrobe's architecture is well known, his watercolors have received little critical attention. Epic Landscapes rediscovers Latrobe's watercolors as an ambitious body of work and reconsiders the close relationship between the visual and spatial sensibility of these images and his architectural designs. It also offers a fresh analysis of Latrobe within the context of creative practice in the Atlantic world at the end of the eighteenth century as he explored contemporary ideas concerning the form of art for Republican society and the social impacts of revolution.
Algorithmic Principles of Remote PPG Wang, Wenjin; den Brinker, Albertus C.; Stuijk, Sander ...
IEEE transactions on biomedical engineering,
07/2017, Letnik:
64, Številka:
7
Journal Article
Recenzirano
Odprti dostop
This paper introduces a mathematical model that incorporates the pertinent optical and physiological properties of skin reflections with the objective to increase our understanding of the algorithmic ...principles behind remote photoplethysmography (rPPG). The model is used to explain the different choices that were made in existing rPPG methods for pulse extraction. The understanding that comes from the model can be used to design robust or application-specific rPPG solutions. We illustrate this by designing an alternative rPPG method, where a projection plane orthogonal to the skin tone is used for pulse extraction. A large benchmark on the various discussed rPPG methods shows that their relative merits can indeed be understood from the proposed model.
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