Sensitivity of early human vision to 3-D orientation in line drawings.

1992 ◽  
Vol 46 (2) ◽  
pp. 143-169 ◽  
Author(s):  
James T. Enns
Keyword(s):  
Human Vision ◽  
Line Drawings ◽  
Early Human

scholarly journals ISETBIO: Computational tools for modeling early human vision

2015 ◽  
Author(s):  
David Brainard ◽  
Haomiao Jiang ◽  
Nicolas P. Cottaris ◽  
Fred Rieke ◽  
E.J. Chichilnisky ◽  
...  
Keyword(s):  
Human Vision ◽  
Computational Tools ◽  
Early Human

Smallest channel in early human vision

1980 ◽  
Vol 70 (7) ◽  
pp. 868 ◽  
Author(s):  
D. Marr ◽  
T. Poggio ◽  
E. Hildreth
Keyword(s):  
Human Vision ◽  
Early Human

Identification of Two-Tone Images; Some Implications for High- and Low-Spatial-Frequency Processes in Human Vision

Perception ◽  
1988 ◽  
Vol 17 (4) ◽  
pp. 429-436 ◽  
Author(s):  
Anthony Hayes
Keyword(s):  
Spatial Frequency ◽  
Human Vision ◽  
Positive Form ◽  
Line Drawings ◽  
Geometric Figures ◽  
Spatial Frequencies ◽  
Negative Images ◽  
Frequency Components

Unlike most multitone images, two-tone images such as print, geometric figures, and line drawings are as easy to interpret in photographic negative as in positive form. However, images derived from a multitone original in which intensity values are quantised to two levels are not. Bi-level quantised images, distinct from most other two-tone images, are shown to contain picture related components in their low spatial frequencies. Since it is the low-spatial-frequency components alone of negative images that present difficulties for vision, it is proposed that images which are as easy to interpret in negative as in positive form are those which are readily identified using only their high spatial frequencies.

The Effect of Symbol Background Color on the Speed of Locating Targets by Adults Without Disabilities: Implications for Augmentative and Alternative Communication Display Design

2019 ◽  
Vol 4 (6) ◽  
pp. 1482-1488
Author(s):  
Jennifer J. Thistle
Keyword(s):  
Augmentative And Alternative Communication ◽  
Reaction Times ◽  
The Other ◽  
Background Color ◽  
Alternative Communication ◽  
Display Design ◽  
Line Drawings ◽  
Research With Children ◽  
Study Participants ◽  
Perceptual Factors

Purpose Previous research with children with and without disabilities has demonstrated that visual–perceptual factors can influence the speech of locating a target on an array. Adults without disabilities often facilitate the learning and use of a child's augmentative and alternative communication system. The current research examined how the presence of symbol background color influenced the speed with which adults without disabilities located target line drawings in 2 studies. Method Both studies used a between-subjects design. In the 1st study, 30 adults (ages 18–29 years) located targets in a 16-symbol array. In the 2nd study, 30 adults (ages 18–34 years) located targets in a 60-symbol array. There were 3 conditions in each study: symbol background color, symbol background white with a black border, and symbol background white with a color border. Results In the 1st study, reaction times across groups were not significantly different. In the 2nd study, participants in the symbol background color condition were significantly faster than participants in the other conditions, and participants in the symbol background white with black border were significantly slower than participants in the other conditions. Conclusion Communication partners may benefit from the presence of background color, especially when supporting children using displays with many symbols.

Sign in / Sign up

Export Citation Format

Share Document