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EyeTap
Wearable computer worn in front of the eye / From Wikipedia, the free encyclopedia
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An EyeTap[1][2][3] is a concept for a wearable computing device that is worn in front of the eye that acts as a camera to record the scene available to the eye as well as a display to superimpose computer-generated imagery on the original scene available to the eye.[3][4] This structure allows the user's eye to operate as both a monitor and a camera as the EyeTap intakes the world around it and augments the image the user sees allowing it to overlay computer-generated data over top of the normal world the user would perceive.
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In order to capture what the eye is seeing as accurately as possible, an EyeTap uses a beam splitter[5] to send the same scene (with reduced intensity) to both the eye and a camera. The camera then digitizes the reflected image of the scene and sends it to a computer. The computer processes the image and then sends it to a projector. The projector sends the image to the other side of the beam splitter so that this computer-generated image is reflected into the eye to be superimposed on the original scene. Stereo EyeTaps modify light passing through both eyes, but many research prototypes (mainly for reasons of ease of construction) only tap one eye.
EyeTap is also the name of an organization founded by inventor Steve Mann[6][7][8][9] to develop and promote EyeTap-related technologies such as wearable computers.[4][10]