10 ENGLISH BOOKS RELATING TO «VISUAL ANGLE»
Discover the use of
visual angle in the following bibliographical selection. Books relating to
visual angle and brief extracts from same to provide context of its use in English literature.
1
The Perception of
Visual Information
Spatial frequency is the number of cycles of the grating per unit length,
sometimes described as the number of cycles per degree of visual angle (cpd). A
fingernail at arm's length subtends about one degree of visual angle. The ligth
and dark ...
William R. Hendee, Peter N.T. Wells, 1997
2
Sensation and Perception
What IS Visual Angle? Visual angle is the angle ofan object relative to the
observer's eye. Figure 10.27a shows how we determine the visual angle ofa
stimulus (a person, in this example) by extending lines from the person to the
lens ofthe ...
3
Textbook of Ophthalmology
Athiya Agarwal HISTORY Herman Snellen was the first to measure visual acuity.
VISUAL ANGLE Definition Visual angle is defined as the angle subtended by an
object at the nodal point (Fig. 19.1). In Figure 19.1 angle ANB is the visual angle.
Sunita Agarwal, Athiya Agarwal, Lucio Buratto, 2002
4
Biology: A Functional Approach. Students' Manual
visual angle Figure 19.1 The theoretical basis of visual acuity of the eye.
Requirements White card Felt pen Ruler Tape measure Snellen chart The visual
acuity of the eye, i.e. its efficiency at seeing things clearly, depends on its
resolving ...
M. B. V. Roberts, T. J. King, 1987
5
Theory And Practice Of Optics And Refraction
In terms of visual angle, the visual acuity is defined as the reciprocal of the
minimum resolvable visual angle measured in minutes of arc for a standard test
pattern. Therefore, to understand visual acuity, the knowledge about visual angle
is ...
6
Visual Selective Attention: A Special Issue of
Visual Cognition
Three of the main effects were significant: attention condition, F(1, 21) = 18.64, p
< 0.003; congruity, F(1, 21) = 139.90, p < 0.001; and visual angle, F(2, 42) =
23.24, p< 0.001. The effect of exposure duration was not significant, nor did it
interact ...
Glyn W. Humphreys, H. Bundesen, Claus Bundesen, 1998
7
Train Accident Reconstruction and FELA and Railroad Litigation
The denominator tells the distance which the letter must be from the eye in order
to produce a visual angle of five minutes. If the letter produces a visual angle of
five minutes when it is twenty feet from the eye then it is the “20 letter.” If the letter
...
James R. Loumiet, William G. Jungbauer, Bernard S. Abrams, 2005
8
Visual Space Perception: A Primer
McCready (1965, 1985, 1986) noted that perceived visual angle a' is usually
assumed to be equal to the actual visual angle: a' = a. In this view, linear and
angular size responses are treated as two ways of measuring the same
perceptual ...
9
Foundations of Perception
The most frequently used measure is visual angle: the angle subtended by the
object at the centre (nodal point) of the lens. Visual angle depends jointly on the
size of the object and its viewing distance. If visual angle is relatively small ( 10°
or ...
10
Visual Perception: An Introduction, 3rd Edition
Figure 8.3 The relationship between perceived size, perceived distance and
visual angle, as expressed by size-distance invariance. An object ofa given
physical size (S), at a given physical distance (D), subtends an angle of θ deg at
the eye.
Nicholas Wade, Mike Swanston, 2013
5 NEWS ITEMS WHICH INCLUDE THE TERM «VISUAL ANGLE»
Find out what the national and international press are talking about and how the term
visual angle is used in the context of the following news items.
Excite Audiences by Finding the Visual Angle of Your Brand
Today's visual social platforms are more popular than ever. Pinterest and Instagram flood the Internet with images, which are twice as likely to be shared as text. «Entrepreneur, Jul 14»
Slavery on Screen: Scholars' Impressions and Interpretations
But there was something about witnessing the whipping from a visual angle that I had not imagined. You're watching from an angle where the whip is almost ... «University of Texas at Austin News, Feb 14»
Falconcam reveals the secrets of mid-air raptor pursuit
“Raptors have incredibly fast visual processing abilities, measured at about 90 ... in which the predator keeps its prey at a fixed visual angle chosen to match the ... «Scientific American, Jan 14»
Image Extend Your Ads : Google Introduces New Image Extensions
Obviously any company with a visual angle will benefit from this – however, for e-commerce websites this feature will not work as well as product listing ads, ... «WordStream, Jun 13»
Visual illusion may explain the allure of pointillist paintings
Visual illusion may explain the allure of pointillist paintings ... the same width as the rings in Monnier and Shevell's study: about 0.15 degrees of visual angle. «ScienceBlogs, Feb 09»
