scholarly journals Canvas and cosmos: Visual art techniques applied to astronomy data

2017 ◽  
Vol 26 (04) ◽  
pp. 1730010 ◽  
Author(s):  
Jayanne English
Keyword(s):  
Visual Art ◽  
Human Perception ◽  
Physical Reality ◽  
Color Images ◽  
Color Theory ◽  
Electromagnetic Spectrum ◽  
Public Outreach ◽  
Black And White ◽  
Scientific Results ◽  
Technical Construction

Bold color images from telescopes act as extraordinary ambassadors for research astronomers because they pique the public’s curiosity. But are they snapshots documenting physical reality? Or are we looking at artistic spacescapes created by digitally manipulating astronomy images? This paper provides a tour of how original black and white data, from all regimes of the electromagnetic spectrum, are converted into the color images gracing popular magazines, numerous websites, and even clothing. The history and method of the technical construction of these images is outlined. However, the paper focuses on introducing the scientific reader to visual literacy (e.g. human perception) and techniques from art (e.g. composition, color theory) since these techniques can produce not only striking but politically powerful public outreach images. When created by research astronomers, the cultures of science and visual art can be balanced and the image can illuminate scientific results sufficiently strongly that the images are also used in research publications. Included are reflections on how they could feedback into astronomy research endeavors and future forms of visualization as well as on the relevance of outreach images to visual art. (See the color online PDF version at http://dx.doi.org/10.1142/S0218271817300105 ; the figures can be enlarged in PDF viewers.)

scholarly journals Color Metallography

2005 ◽  
Vol 13 (6) ◽  
pp. 22-27 ◽  
Author(s):  
George F. Vander Voort
Keyword(s):  
Digital Imaging ◽  
Color Images ◽  
Vast Number ◽  
Human Eye ◽  
Black And White ◽  
Color Metallography ◽  
The Cost

Color has historically seen limited use in metallography, mainly due to the cost of film and prints and the difficulty and cost of reproducing images in publications. However, with the growth of digital imaging, capturing color images is much simpler and cheaper. Also, printing images in color is inexpensive for in-house reports, and can be distributed cheaply on CDs, although reproduction in journals is still expensive. Color does have many advantages over black and white. First, the human eye is sensitive to only about forty shades of gray from white to black, but is sensitive to a vast number of colors. Tint etchants reveal features in the microstructure that often cannot be revealed using standard black and white etchants.

“He” Had Me at Blue: Color Theory and Visual Art

Leonardo ◽  
2014 ◽  
Vol 47 (5) ◽  
pp. 460-465
Author(s):  
Barbara L. Miller
Keyword(s):  
Visual Art ◽  
Turning Points ◽  
Combustible Mixture ◽  
Color Theory ◽  
Blue Color ◽  
History Of ◽  
Bodily Activity

Schopenhauer and Goethe argued that colors are dangerous: When philosophers speak of colors, they often begin to rant and rave. This essay addresses the confusing and treacherous history of color theory and perception. An overview of philosophers and scientists associated with developing theories leads into a discussion of contemporary perspectives: Taussig’s notion of a “combustible mixture” and “total bodily activity” and Massumi’s idea of an “ingressive activity” are used as turning points in a discussion of Roger Hiorns’s Seizure—an excruciatingly intoxicating installation.

Transgenic expression of a GFP-rhodopsin COOH-terminal fusion protein in zebrafish rod photoreceptors

2002 ◽  
Vol 19 (4) ◽  
pp. 547-547
Author(s):  
BRIAN D. PERKINS ◽  
PAMELA M. KAINZ ◽  
DONALD M. O'MALLEY ◽  
JOHN E. DOWLING
Keyword(s):  
Fusion Protein ◽  
Color Images ◽  
Rod Photoreceptors ◽  
Transgenic Expression ◽  
Visual Neuroscience ◽  
Black And White ◽  
Production Error

(Article appeared in Visual Neuroscience (2002), 19, 257–264.)Due to a production error, we are reprinting the following article because the color images were printed in black and white. The color images are so very important to the understanding of this article, we are reprinting it here with the color images in place.

scholarly journals Visualizing Belief and Piety in Iranian Shi‘ism

2011 ◽  
Vol 28 (4) ◽  
pp. 137-140
Author(s):  
Edith Szanto
Keyword(s):  
Visual Culture ◽  
Visual Art ◽  
Roland Barthes ◽  
Thick Description ◽  
Black And White ◽  
Ritual Spaces ◽  
Visual Piety ◽  
Semiotic Theory

In her book, Ingvild Flaskerud once and for all dispels the idea that Islamlacks and opposes all forms of visual art. Hers is a pioneering work, whichguides her readers through Twelver Shi‘i visual culture in Iran. She framesher discussion by drawing on semiotic theory, particularly Charles SandersPeirce and Roland Barthes, in order to show both the interpretive possibilitiesinherent in visual piety and the ways in which meaning is fixed.Flaskerud is uniquely positioned for writing about visual piety, as she hasalready produced an artistic visual film (“Standard Bearers of Hussein:Women Commemorating Karbala,” 2003) on Shi‘i women’s practices inIran. Visualizing Belief and Piety in Iranian Shi‘ism is a Geertzian “thick description”(Geertz, The Interpretation of Cultures) composed of three parts,each of which is followed by black-and-white pictures analyzed in thatpart. The first two parts address two iconographic themes respectively. Thethird discusses the usage of pious art in votive practices and ritual spaces ...

Analysis of SSIM Based Quality Assessment across Color Channels of Images

2015 ◽  
pp. 1233-1245
Author(s):  
T. Chandrakanth ◽  
B. Sandhya
Keyword(s):  
Image Processing ◽  
Quality Assessment ◽  
Color Space ◽  
Similarity Index ◽  
Human Perception ◽  
Structural Similarity ◽  
Subjective Assessment ◽  
Color Images ◽  
Color Spaces ◽  
Cie Lab

Advances in imaging and computing hardware have led to an explosion in the use of color images in image processing, graphics and computer vision applications across various domains such as medical imaging, satellite imagery, document analysis and biometrics to name a few. However, these images are subjected to a wide variety of distortions during its acquisition, subsequent compression, transmission, processing and then reproduction, which degrade their visual quality. Hence objective quality assessment of color images has emerged as one of the essential operations in image processing. During the last two decades, efforts have been put to design such an image quality metric which can be calculated simply but can accurately reflect subjective quality of human perception. In this paper, the authors evaluated the quality assessment of color images using SSIM (structural similarity index) metric across various color spaces. They experimented to study the effect of color spaces in metric based and distance based quality assessment. The authors proposed a metric using CIE Lab color space and SSIM, which has better correlation to the subjective assessment in a benchmark dataset.

scholarly journals A New Human Perception-Based Over-Exposure Detection Method for Color Images

Sensors ◽  
2014 ◽  
Vol 14 (9) ◽  
pp. 17159-17173 ◽  
Author(s):  
Yeo-Jin Yoon ◽  
Keun-Yung Byun ◽  
Dae-Hong Lee ◽  
Seung-Won Jung ◽  
Sung-Jea Ko
Keyword(s):  
Detection Method ◽  
Human Perception ◽  
Color Images

scholarly journals The Café Wall Illusion: Local and Global Perception from Multiple Scales to Multiscale

2017 ◽  
Vol 2017 ◽  
pp. 1-22 ◽  
Author(s):  
Nasim Nematzadeh ◽  
David M. W. Powers
Keyword(s):  
Peripheral Vision ◽  
Multiple Scales ◽  
Human Perception ◽  
Optical Illusions ◽  
Black And White ◽  
Difference Of Gaussians ◽  
Aspect Ratios ◽  
Geometrical Illusions ◽  
Model Variant ◽  
High Level

Geometrical illusions are a subclass of optical illusions in which the geometrical characteristics of patterns in particular orientations and angles are distorted and misperceived as a result of low-to-high-level retinal/cortical processing. Modelling the detection of tilt in these illusions, and its strength, is a challenging task and leads to the development of techniques that explain important features of human perception. We present here a predictive and quantitative approach for modelling foveal and peripheral vision for the induced tilt in the Café Wall illusion, in which parallel mortar lines between shifted rows of black and white tiles appear to converge and diverge. Difference of Gaussians is used to define a bioderived filtering model for the responses of retinal simple cells to the stimulus, while an analytical processing pipeline is developed to quantify the angle of tilt in the model and develop confidence intervals around them. Several sampling sizes and aspect ratios are explored to model variant foveal views, and a variety of pattern configurations are tested to model variant Gestalt views. The analysis of our model across this range of test configurations presents a precisely quantified comparison contrasting local tilt detection in the foveal sample sets with pattern-wide Gestalt tilt.

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