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Topic: Depth perception

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	Perception (psychology) - MSN Encarta
		Depth perception also plays a major role in size constancy, the tendency to perceive objects as staying the same size despite changes in our distance from them.
		Depth perception is the ability to see the world in three dimensions and to perceive distance.
		The problem of encoding depth on the two-dimensional retina is quite similar to the problem faced by an artist who wishes to realistically portray depth on a two-dimensional canvas.
	encarta.msn.com /encyclopedia_761571997_4/Perception_(psychology).html (1260 words)

	Depth perception - Wikipedia, the free encyclopedia
		Depth perception combines several types of depth cues grouped into two categories: monocular cues (cues available from the input of just one eye) and binocular cues (cues that require input from both eyes).
		Accommodation - This is an oculomotor cue for depth perception.
		Depth perception is (along with sexual reproduction), a convincing real-life example of the "thesis+antithesis>synthesis" model of progress developed by Hegel, Fichte, and Engels.
	en.wikipedia.org /wiki/Depth_perception (2377 words)

	Depth Perception (Site not responding. Last check: 2007-10-14)
		Objectives You should be able to describe pictorial, binocular and dynamic cues for depth perception and understand the issues involved in the combination of depth cues.
		Blur on the other hand varies with depth and could in principle be used as a depth cue.
		Uncrossed retinal disparity is inversely proportional the square of the distance of the object thus disparity is not an effective cue for small depth differences at large distances.
	www.psychol.ucl.ac.uk /alan.johnston/Depth.html (1193 words)

	Visual Distance Perception and Depth Perception
		The purpose of this paper is to help people who have "Reduced" Distance and/or Depth Perception to understand and to improve their distance and depth perception skills with lenses and/or training in order to drive or to perform other types of tasks more safely and more efficiently.
		This topic is of interest because the visual scenes which require precise distance- and depth- perception (without stereopsis) are electronically rotated by computers, in any of three dimensions, so that the surgeon can view, compare and measure any or all elements in his flat views.
		DEPTH PERCEPTION or viewing directly ahead in a tube and estimating distances ahead, is very difficult to achieve, with or without stereopsis.
	www.abledata.com /abledata_docs/Distance_Perception.htm (4587 words)

	Depth Perception (Site not responding. Last check: 2007-10-14)
		Showing depths ranging from 2.5 to 300-feet (0-100m), other features include a shallow and deep water alarm, varying display rate and depth averaging rate, an automatic and manual adjustable gain, and depth trend.
		As a depth sounder, it has the same high-contrast LCD with bold, fl digits that are 1-5/8" but reads to a maximum of 400-feet (150m).
		Depth can be calibrated to read from either the transducer or set to display depth from the water's surface or the bottom of the keel.
	www.si-tex.com /html/depth_perception.html (1387 words)

	Project LITE -- Depth
		Depth appears when shading gradients vary in figure and background.
		Induced perception of depth from a rotating 3D object in two dimensions.
		Apparent depth induced by the motion of a shadow.
	lite.bu.edu /vision/applets/Depth/Depth/Depth.html (140 words)

	Psych 200 Unit 6 Module 6 - Depth Perception
		This means that depth perception is achieved with cues pertaining to the visualpattem, rather than muscle adjustments of the eye or head movements.
		Depth perception based on retinal disparity can be demonstrated in children as young as one year (Johnson and Beck, 1941).
		This diagramillustrates the depth perception cue of ____________________________4
	online.sfsu.edu /~psych200/unit6/66.htm (2728 words)

	Perception (psychology) - MSN Encarta
		Perception (psychology), process by which organisms interpret and organize sensation to produce a meaningful experience of the world.
		Perception, on the other hand, better describes one’s ultimate experience of the world and typically involves further processing of sensory input.
		In practice, sensation and perception are virtually impossible to separate, because they are part of one continuous process.
	encarta.msn.com /encyclopedia_761571997/Perception_(psychology).html (783 words)

	Webvision: The Perception of Depth
		Stereopsis refers to our ability to appreciate depth, that is the ability to distinguish the relative distance of objects with an apparent physical displacement between the objects.
		Stereopsis is the perception of depth produced by binocular retinal disparity.
		Retinal disparity is essential for stereoscopic depth perception as stereoscopic depth perception results from fusion of slightly dissimilar images.
	webvision.med.utah.edu /KallDepth.html (1219 words)

	Human Depth Perception (Site not responding. Last check: 2007-10-14)
		It is probably the most important cue for depth perception, the amount of the displacement depends on the relative distance of the objects from the eye.
		These kinds of depth perception are also found in pictures (speaking of "ordinary" photography or pictures produced by artists, but not stereograms).
		As a final remark it is to be pointed out that under normal perception conditions all of these different cues to depth perception lead to a single, coherent, three dimensional interpretation of our environment.
	www2.iicm.tugraz.at /0x811bc833_0x000dacca (1063 words)

	Free Essay Is Depth Perception Inherited or Learned?
		Depth perception is what keeps humans from colliding with other objects in their path; without the proper development of depth perceptio...
		From this experiment, Gibson and Walk concluded that depth perception was inborn to all animals and humans by the time they achieve independent movement.
		This study not only proves that facial recognition is an inborn quality of humans but it shows that infants learn depth perception from trial and error through their inborn reliance on their caretaker.
	www.echeat.com /essay.php?t=28779 (644 words)

	Aliasing and Depth Perception Project (Site not responding. Last check: 2007-10-14)
		The perception of 3D layout is accomplished via the non-linear combination of many sources of information about depth or "cues."
		Depth cues are sampled by the pixel matrix of a display surface.
		We are conducting experiments to quantify the limits of human perception of depth in computer-generated 3D imagery.
	www.cl.cam.ac.uk /Research/Rainbow/projects/perception.html (209 words)

	Virtual Reality and Perception Lab
		We study how the brain, or a machine, can reconstruct a three-dimensional percept of the world around us from the two-dimensional images on the retinas and how we use this information to move about and interact with our environment.
		We are particularly interested in the role of vertical disparities in stereopsis, the integration and relation between depth cues and the role of eye movements in depth perception.
		We also use virtual-reality technology as a tool to study depth perception and the perception of motion through a three-dimensional environment.
	www.cse.yorku.ca /~percept (234 words)

	Depth Perception Information on Healthline
		The ability to perceive depth seems to exist early in life.
		Prior to that, they may be unable to do so in part because of weak eye muscles that do not let them use binocular depth cues.
		Children's Viewmasters produce a three-dimensional image that has depth because of a slightly different picture that is delivered to each eye.
	www.healthline.com /galecontent/depth-perception (341 words)

	PHYS1330 Depth Perception
		Image sharpness/fuzziness is an ambiguous depth cue, as we have already seen in the discussion of depth of field in cameras.
		We have already seen that the sharpness of an image is an ambiguous depth cue; the object might have naturally fuzzy edges.
		They are ambiguous in that they do not literally indicate depth, but are so often related to depth in our natural environment that they are pretty reliable.
	www.physics.utoledo.edu /~lsa/_color/19_depth.htm (2426 words)

	BBC NEWS \| Health \| Alcohol hampers depth perception
		It is well known that binocular vision is important for depth perception.
		The researchers asked 15 volunteers to perform tasks that measured perception of depth from motion parallax before and after drinking alcohol.
		As expected, when the volunteers were intoxicated their ability to judge depth from motion parallax was impaired.
	news.bbc.co.uk /1/hi/health/4135233.stm (464 words)

	[No title]
		Depth perception is an important advantage for humans and other binocular animals.
		There are many monocular clues for depth perception, all of which give the brain clues as to where an object is in relation to another.
		Using our perception of visual height there is nothing wrong with this, the aqueduct is simply receding into the distance.
	members.lycos.co.uk /brisray/optill/vision1.htm (1395 words)

	Depth Perception
		Accommodation is considered a monocular depth cue since it is available even when we see with a single eye.
		Accommodation and convergence are considered to be minor cues in depth perception.
		In remote sensing, several cues are used to represent depths of terrain.
	www.ccrs.nrcan.gc.ca /resource/tutor/stereo/chap2/chapter2_5_e.php (551 words)

	Perception (Site not responding. Last check: 2007-10-14)
		The perception continually shifts from rows to columns as the viewer tries to determine what is the figure and what is the ground.
		This may be an interesting example to use in a discussion of depth cues, shadowing, ambiguous figures, or perception in general.
		Change the object's shadow to change the apparent depth of the object (although the motion of the object is not altered in any way).
	psych.la.psu.edu /clip/Perception.htm (9173 words)

	parenting: pediatric eye care, children's vision, lazy eye, esotropia, exotropia, exophoria, esophoria, convergence ...
		Non-medical vision therapy, as related to visual perception, prepares children for a lifelong learning, and fills in gaps for many adults who have lost visual skills and abilities.
		DEPTH PERCEPTION: an important aspect of normal, healthy vision; a result of good stereoscopic vision; the ability to visually perceive depth and three dimensional space; the ability to visually judge relative distances between objects; a perceptual skill that aids accurate movement in three-dimensional space.
		The loss of binocular depth perception robs a person of more than just the possibility of being a professional baseball player or dentist children-special-needs.org asserts that the lack of binocular vision is a serious vision impairment that deserves more attention.
	www.children-special-needs.org /questions.html (2835 words)

	Healthline - Search Results For depth
		A brief discussion of anesthetic depth may be helpful in understanding people's interest in monitoring the brain's responses to anesthesia.
		Curing light intensity and depth of cure of resin based composites tested according to internatio...
		A vaccine has existed since the early 1940s, but problems including lack of awareness of the disease, a limited and unstable vaccine supply, the expense of vaccine, and lack of guidance and programmatic support for immunization means vaccination...
	www.healthline.com /search?q1=depth (516 words)

	Improving Depth Perception - Success with Visual Disabilities through Vision Therapy
		I have enhanced my depth perception, which has been a goal of mine from the beginning of the Vision Therapy sessions.
		Prior to therapy, Weston had depth perception problems, which affected his ability to play basketball and read.
		More importantly, I have enhanced my depth perception, which has been a goal of mine from the beginning of the Vision Therapy sessions.
	www.visiontherapystories.org /depth_perception.html (1937 words)

	HeadWize - Article: Depth Perception In Headphones by Ron Soh
		The alternative to hear the effect of reveberation on the perception of distances is to listen to binaural CDs, which also capture a lot of hall reverb, as a secondary by-product of the recording method.
		The sense of depth or movement to and from the mikes is likewise the same as Index 1, but due to the center mike, images far-left do not seem as far-left and the images far-right do not seem as far-right, compared to Index 1.
		The sense of depth or movement to and from the mikes is likewise the same as Index 1 and 2, but due to the ORTFs picking up less hall reverb, the image of Mr.
	headwize.com /articles/soh_art.htm (4515 words)

	Shadows
		The moving shadow cue is also simple: the farther a shadow moves from the object casting it, the farther the object is from the background.
		One reason may be the presumption that cast shadow information is not strong, because the cue is indirect--vision has to figure out which is the object and which is the shadow in order to use the cue.
		The apparent motion in depth of the ball is strikingly different in the two cases.
	gandalf.psych.umn.edu /~kersten/kersten-lab/shadows.html (653 words)

	Neuroscience for Kids - Perceiving Motion, Form and Depth
		Along with information on motion, shape, and color, our brains receive input that indicates both depth, the perception that different objects are different distances from us, and the related concept of stereopsis, the solidity of objects.
		Even though these monocular cues provide some depth vision so that the world does not look "flat" to us when we use just one eye, viewing a scene with two eyes-binocular vision-gives most people a more vivid sense of depth and of stereopsis.
		Experiments have shown that depth perception occurs at the level of the primary visual cortex or perhaps higher in the association cortex where individual neurons receiving input from the two retinas fire specifically when retinal disparity exists.
	faculty.washington.edu /chudler/eyeper.html (2609 words)

	Methods of Depth Perception
		Other than binocular disparity, there are three major methods the brain uses for depth perception: accommodation, convergence, and parallax.
		measures depth by measuring the direction your eyes are pointing.
		The brain compensates for this by making the picture appear to rotate as you move so that the finger and eyes are always pointed directly towards you.
	library.thinkquest.org /27066/depth/nlotherdepth.html (564 words)

	"Glossary: depth perception, amblyopia, lazy eye, strabismus, pediatric ophthalmologists, pediatric optometrists, ...
		The result is often a loss of stereoscopic vision (3D) and depth perception.
		Research has also demonstrated that patients with amblyopia are more likely to sustain injuries resulting in the loss of their good eye than individuals with two good eyes.
		BINOCULAR DEPTH PERCEPTION: a result of successful eye teaming and stereoscopic vision; the ability to visually perceive three dimensional space; the ability to visually judge relative distances between objects; a visual-motor skill that aids accurate movement in three-dimensional space.
	www.children-special-needs.org /vocvis.html (1192 words)

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