Visual cues
Visual cues are sensory cues received by the eye and processed by the visual system during visual perception. Since the visual system is dominant in many species, especially humans, visual cues are a large source of information in how the world is perceived. [1]
Types of cues
Depth
The ability to perceive the world in three dimensions and estimate the size and distance to an object depends heavily on depth cues. The two major depth cues, Stereopsis and motion parallax, both rely on parallax which is the difference between the perceived position of an object given two different viewpoints. In stereopsis the distance between the eyes is the source of the two different viewpoints, resulting in a Binocular disparity. Motion parallax relies head and body movement to produce the necessary viewpoints. [2]
Motion
The visual system can detect motion both using a simple mechanism based on information from multiple clusters of neurons as well as by aggregate through by integrating multiple cues including contrast, form, and texture.
Biological Motion
Humans in particular have evolved a particularly keen ability to detect if motion is being generated by biological source, even with point light displays where dots representing the joints of an animal. [3] Recent research suggests that this mechanism can also reveal the gender, emotional state, and action of a given human light point model.[4]
Color
The ability to distinguish between colors allows an organism quickly and easily recognize danger since many brightly colored plants and animals pose some kind of threat, usually harboring some kind of toxin. Color also serves as an inferential cue that can prime both motor action[5] and interpretation of a persuasive message.[6]
Contrast
Contrast, or the difference in luminance and/or color that helps make an object distinguishable, is important inedge detection and serves as a cue.
References
- ^ Posner, Michael I. (March 1976). "Visual dominance: An information-processing account of its origins and significance". Psychological Review. 83 (2): 157–171. doi:10.1037/0033-295X.83.2.157.
{{cite journal}}:|access-date=requires|url=(help); Unknown parameter|coauthors=ignored (|author=suggested) (help)CS1 maint: date and year (link) - ^ Steinman, Scott B.; Garzia, Ralph Philip (2000). Foundations of Binocular Vision: A Clinical perspective. McGraw-Hill Professional. pp. 2–5. ISBN 0-8385-2670-5.
{{cite book}}: Invalid|ref=harv(help) - ^ G. Johansson (1973). "Visual perception of biological motion and a model for its analysis". Percept. Psychophys. 14 (2): 201–211. doi:10.3758/BF03212378.
- ^ Alaerts, Kaat (June 9, 2011). "Action and Emotion Recognition from Point Light Displays: An Investigation of Gender Differences". PLoS ONE. 6 (6): e20989. doi:10.1371/journal.pone.0020989.
{{cite journal}}:|access-date=requires|url=(help); Unknown parameter|coauthors=ignored (|author=suggested) (help)CS1 maint: unflagged free DOI (link) - ^ Schmidt, T.: The finger in flight: Real-time motor control by visually masked color stimuli. In: Psychological Science, Nr. 13, 2002, S. 112-118.
- ^ Gerend, Mary A. (July 2009). "Message framing and color priming: How subtle threat cues affect persuasion". Journal of Experimental Social Psychology. 45 (4): 999–1002. doi:doi:10.1016/j.jesp.2009.04.002.
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