Electronic equipment having viewpoint detection apparatus with d

Details Electronic equipment having viewpoint detection apparatus with d Electronic equipment having viewpoint detection apparatus with d

1995-06-14

1998-05-26

Garber, Wendy

Television

Camera, system and detail

With electronic viewfinder or display monitor

396 51, H04N 5225

Patent

active

057574286

ABSTRACT:
Abnormality determination of eyeball illumination is performed by a computer on the basis of the output level, i.e., lightness of a cornea reflection image. When an abnormality is determined, a display indicating it is made and a warning is given. At the same time, power supply for eyeball illumination is stopped. The abnormality determination of eyeball illumination is performed by comparing the output level of a cornea reflection image with a predetermined reference value or comparing the output level ratio or difference of the cornea reflection image with a predetermined reference value.

REFERENCES:
patent: 4486080 (1984-12-01), Itoh et al.
patent: 5436679 (1995-07-01), Ohtsuka et al.
patent: 5436690 (1995-07-01), Watanabe
patent: 5491532 (1996-02-01), Suzuki et al.
patent: 5570156 (1996-10-01), Arai et al.
patent: 5579079 (1996-11-01), Yamada et al.

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