Television – Image falsification to improve viewer perception of... – Contour generator
Patent
1995-06-21
1998-09-01
Woo, Stella
Television
Image falsification to improve viewer perception of...
Contour generator
348 14, H04N 714
Patent
active
058017585
ABSTRACT:
A video conferencing system includes a display screen, a switching device, a rear-projection projector and a camera. The switching device regulates use of a single optical path by alternating between use by the projector and the camera. In the image projection mode, projected light from the projector passes onto the screen uninterrupted. In the image capture mode, the light from the projector is blocked by the switching device, and the ambient room lighting is allowed to pass through the screen and is reflected by the switching device toward the camera. The problem of loss of eye contact between system users is eliminated by time sharing a single optical path. Part of the time, the projector is allowed to use the optical path and an image is projected onto the screen for a first user to view. The other part of the time the camera uses the optical path to receive an incoming image of the first user transmitted to the camera to be captured. When the optical path is used by the camera (the capture cycle), no image is projected on the screen since the the projected light remains blocked by the switching device. However, the duration of the capture cycle is such that the user's perception seamlessly integrates the absence of the projected image during image capture with the projected image at other times to present what appears to be full, uninterrupted projection of an image in real time.
REFERENCES:
patent: 4928301 (1990-05-01), Smoot
patent: 5079627 (1992-01-01), Filo
patent: 5612734 (1997-03-01), Nelson et al.
Apple Computer Inc.
Woo Stella
LandOfFree
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