Method and apparatus for taking distance images

Details Method and apparatus for taking distance images Method and apparatus for taking distance images

1994-02-03

1996-06-11

Chin, Tommy P.

Television

Image falsification to improve viewer perception of...

False color

348 31, H04N 912

Patent

active

055260381

ABSTRACT:
A method for producing distance images according to the principle of emitting a light signal and the time-delayed reception of the reflected light signal by a receiving device wherein at least two reflection images of the same distance range are taken, and the emitted light signal is intensity-modulated by a modulation frequency. When at least one of the two reflection images is taken, the sensitivity of the receiving device is modulated by the same modulation frequency and is fixed in-phase with respect to it. Subsequently, by a comparison of the light intensity values in the first and second reflection images, the reflectivity and the distance of the objects are determined.

REFERENCES:
patent: 3649124 (1972-03-01), Takaoka et al.
patent: 4811093 (1989-03-01), Giacometti
patent: 5157451 (1992-10-01), Taboada et al.
patent: 5274430 (1993-12-01), Lux

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