Camera As An Interaction Device
The cameras of smartphones are used as input devices in numerous research projects and commercial applications. A commercially successful example is the use of QR Codes attached to physical objects. QR Codes can be sensed by the phone using its camera and provide an according link to related digital content, usually a URL. Another approach is using camera images to recognize objects. Content based image analysis is used to recognize physical objects such as advertisement posters to provide information about the object. Hybrid approaches use a combination of unobstrusive visual markers and image analysis. An example is to estimate the pose of the camera phone to create a real-time overlay for a 3D paper globe. On recent camera phones it is even feasible to provide an augmented reality overlay for 2D objects and to recognize multiple objects on the phone using a stripped down object recognition algorithm as well as using GPS and compass. Auto-geotagging can show where a picture is taken, promoting interactions and allowing a photo to be mapped with others for comparison.
Besides the usual back camera, some phones have a front camera facing the user for purposes including videoconferencing and self-portraiture.
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Famous quotes containing the words camera, interaction and/or device:
“The camera introduces us to unconscious optics as does psychoanalysis to unconscious impulses.”
—Walter Benjamin (1892–1940)
“Those thoughts are truth which guide us to beneficial interaction with sensible particulars as they occur, whether they copy these in advance or not.”
—William James (1842–1910)
“Syntax is the study of the principles and processes by which sentences are constructed in particular languages. Syntactic investigation of a given language has as its goal the construction of a grammar that can be viewed as a device of some sort for producing the sentences of the language under analysis.”
—Noam Chomsky (b. 1928)