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Further developments on `HeadCam': joint estimation of camera rotation+gain group of transformations for wearable bi-foveated cameras

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1 Author(s)
Mann, S. ; MIT, Cambridge, MA, USA

An eyeglass-mounted camera system with wearable multimedia computer (`WearCam') was previously proposed. In particular, `WearCam' contains two miniature cameras: one (wide-angle in landscape orientation) provides the overall contextual information from the wearer's perspective, while the other (telephoto, in portrait orientation) provides close-up details, such as faces. This `bi-foveated' scheme was found to work well within the context of a proposed model of image motion characterized by a projective (homographic) coordinate transformation together with a gain transformation. Applications of `WearCam' include personal safety (crime prevention and personal documentary), perceptual intelligence/situational awareness (in the context of personal wearable multimedia), and homographic modeling (wearable, tetherless computer-mediated reality). A pencigraphic image representation is presented where the photometric response function of the camera is determined to within a constant, and the registered images are assembled into a photometric environment map, yielding an estimate, to within a constant scale factor, of the number of photons of light coming from each angle, toward the wearer

Published in:

Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on  (Volume:4 )

Date of Conference:

21-24 Apr 1997

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